US 8,191,091 Signal processing apparatus and methods

3 defendants · 3 suits · updated October 6, 2026

Also cited as U.S. Patent No. 8,191,091 · US8191091B1 · US 8,191,091 B1 · 8191091 · the '091 patent

ContentNexus LLC has filed 3 patent-infringement suits on US 8,191,091, "Signal processing apparatus and methods" since August 18, 2026, all in the E.D. Tex., against 3 distinct defendants including Amagi Media Labs Limited, G-Core Labs S.A. and OvenMedia Labs Inc.. The patent was granted May 29, 2012 on a priority date of November 3, 1981. Its abstract opens: "A unified system of programming communication." The examiner cited 69 references during prosecution.

Assignee: Contentnexus LLC
Priority date: November 3, 1981
Granted: May 29, 2012
Expires: November 3, 2001
Status: Active
Claims: 31 (4 independent)
Inventors: John Christopher Harvey, James William Cuddihy
Full text: Google Patents

The suits

3 cases · E.D. Tex. (3)

Filed	Defendant	Plaintiff	Court	Docket
2026-08-18	Amagi Media Labs Limited	ContentNexus LLC	E.D. Tex.	2:26-cv-00700
2026-08-18	G-Core Labs S.A.	ContentNexus LLC	E.D. Tex.	2:26-cv-00702
2026-08-18	OvenMedia Labs Inc.	ContentNexus LLC	E.D. Tex.	2:26-cv-00703

Docket links open the public record on CourtListener. Filing dates are the complaint's.

Independent claims

What is actually asserted, verbatim.

Claim 1

1. A method of inhibiting piracy of information or enabling a presentation of programming at a subscriber station, said method comprising the steps of: receiving an information transmission from a first remote station; detecting instruct-to-sample instructions in the information transmission; processing, under control of said instruct-to-sample instructions, a datum at said subscriber station; comparing, under control of said instruct-to-sample instructions, selected comparison information of said instruct-to-sample instructions to a selected sample of preprogrammed operating information at said subscriber station, said selected comparison information and said selected sample of preprogrammed operating information being selected based on said step of processing, whereby a successful match indicates that said subscriber station is properly programmed and a failed match suggests that said preprogrammed operating information at said subscriber station has been tampered with; and performing, under control of said instruct-to-sample instructions, at said subscriber station at least one of the steps of: (1) disabling the functionality of some portion of said subscriber station (i) when said step of comparing results in a determination that said subscriber station has been tampered with or (ii) when an instruction is executed based on said step of comparing and said subscriber station fails to respond in a predetermined fashion or within a predetermined period of time; (2) communicating appearance-of-tampering information to a second remote station when said step of comparing results in a determination that said subscriber station has been tampered with; and (3) enabling at least some of a programming presentation when said step of comparing results in a determination that said subscriber station is properly programmed.

Claim 13

13. A method of decrypting programming at a receiver station, said method comprising the steps of: receiving an encrypted digital information transmission including encrypted information; detecting in said encrypted digital information transmission the presence of an instruct-to-enable signal; passing said instruct-to-enable signal to a processor; determining a fashion in which said receiver station locates a first decryption key by processing said instruct-to-enable signal; locating said first decryption key based on said step of determining; decrypting said encrypted information using said first decryption key; and outputting said programming based on said step of decrypting.

Claim 20

20. A method of decrypting programming at a receiver station, said method comprising the steps of: receiving an encrypted digital information transmission including encrypted information; detecting in said encrypted digital information transmission the presence of a first instruct-to-enable signal including first processor instructions; executing said first processor instructions of said first instruct-to-enable signal to provide a first decryption key; detecting in said encrypted digital information transmission the presence of a second instruct-to-enable signal including second processor instructions; executing said second processor instructions to provide a second decryption key; decrypting said encrypted information using said first and second decryption keys; and outputting said programming based on said step of decrypting.

Claim 26

26. A method of decrypting programming at a receiver station, said method comprising the steps of: receiving an information transmission including encrypted information; detecting the presence of an instruct-to-enable signal; passing said instruct-to-enable signal to a processor; automatically tuning said receiver station to a channel designated by said instruct-to-enable signal; receiving enabling information from a remote source based on said step of tuning; decrypting said encrypted information by processing said enabling information; and outputting said programming based on said step of decrypting.

Art before the examiner

1178 references of record, 69 cited by the examiner.

Everything listed here was before the Office and is what a challenge must go beyond. Art the examiner never saw is where an invalidity search starts.

Examiner-cited

US3531583A — Subscription television receiver (Zenith Radio Corp)
US3668307A — Two-way community antenna television system (Kms Ind Inc)
US3684823A — Television communications system (Coaxial Scient Corp)
US3696297A — Broadcast communication system including a plurality of subscriber stations for selectively receiving and reproducing one or more of a plurality of transmitted programs each having a unique identifying cone associated therewith (Richard J Otero)
US3733430A — Channel monitoring system (Rca Corp)
US3755624A — Pcm-tv system using a unique word for horizontal time synchronization (Communications Satellite Corp)
US3790700A — Catv program control system (Hughes Aircraft Co)
GB1370535A — Transmission of alphanumeric data by television (British Broadcasting Corp)
US3848082A — System for transmitting and utilizing supplemental data via television systems (Atlantic Res Corp)
US3859458A — Receiver for receiving a still picture broadcasting signal (Hitachi Ltd)
US3886302A — Closed circuit television modem sharing system (Hughes Aircraft Co)
US3936595A — Signal transmission system for transmitting programed information such as programed instruction (Nippon Hoso Kyokai)
US3975583A — Emergency civil defense alarm and communications systems (First National Bank Of Decatur, Alabama)
US4025851A — Automatic monitor for programs broadcast (A.C. Nielsen Company)
US4052737A — Method and apparatus utilizing baudot code for categorizing and selectively distributing information to a plurality of utilization units (Com Tel, Inc.)
US4054911A — Information retrieval system for providing downstream loading of remote data and processing control thereof (Idr, Inc.)
US4064490A — Information retrieval system having selected purpose variable function terminal (Nagel Robert H)
US4107735A — Television audience survey system providing feedback of cumulative survey results to individual television viewers (R. D. Percy & Company)
US4135156A — Satellite communications system incorporating ground relay station through which messages between terminal stations are routed (Sanders Associates, Inc.)
US4218698A — TV Graphics and mixing control (Rca Corporation)
US4225884A — Method and system for subscription television billing and access (Telease, Inc.)
WO1980002093A1 — Method of transmitting from a radio transmitter remote control signals for recording information on the receiver side (A Vikene)
US4230990A — Broadcast program identification method and system (Lert John G Jr)
US4245245A — Interactive CATV system (Pioneer Electronic Corporation)
US4250521A — Video signal dropout compensator (Rca Corporation)
US4251691A — Picture/audio signal transmission system (Nippon Telegraph And Telephone Public Corporation)
US4305101A — Method and apparatus for selectively recording a broadcast (Codart, Inc.)
US4317215A — Tuning system for CATV terminal (Pioneer Electronic Corporation)
US4331974A — Cable television with controlled signal substitution (Iri, Inc.)
US4367488A — Data encoding for television (Sterling Television Presentations Inc. Video Data Systems Division)
US4368483A — Video signal defect replacement circuitry (Rca Corporation)
US4380027A — Data encoding for television (William Leventer)
US4381522A — Selective viewing (Adams-Russell Co., Inc.)
US4388645A — Teletext communication system with timed multipage local memory (Zenith Radio Corporation)
US4402009A — Method and apparatus for enhancing an incomplete, limited bandwidth picture generated by an image sensor (Licentia Patent-Verwaltungs-Gmbh)
US4415771A — Public alert and advisory systems (Louis Martinez)
US4422093A — Television burst service (Eeco Incorporated)
US4430669A — Transmitting and receiving apparatus for permitting the transmission and reception of multi-tier subscription programs (Payview Limited)
US4430731A — Video and data distribution module with subscriber terminal (The Manitoba Telephone System)
US4439761A — Terminal generation of dynamically redefinable character sets (Bell Telephone Laboratories, Incorporated)
US4450477A — Television information system (Lovett Bruce E)
US4455570A — CATV System (Pioneer Electronic Corporation)
US4464679A — Method and apparatus for operating a microprocessor in synchronism with a video signal (Rca Corporation)
USRE31735E — Subscriber-limited reception television broadcast security encoder-decoder system (Feature Film Services)
US4484025A — System for enciphering and deciphering data (Licentia Patent-Verwaltungs-Gmbh)
US4492820A — Telephone alarm system (Salt Lake Communications, Inc.)
US4506387A — Programming-on-demand cable system and method (Walter Howard F)
US4518989A — Buffer memory dispersion type video/audio transmission system with spatially and timewise divided inter-office junction lines (Hitachi, Ltd.)
US4536791A — Addressable cable television control system with video format data transmission (Tocom, Inc.)
US4538176A — Buffer memory dispersion type video/audio transmission system (Hitachi, Ltd.)
US4599647A — Receiver with interface for interaction with controller-decoder (General Instrument Corporation)
US4599644A — Method of and apparatus for monitoring video-channel reception (Peter Fischer)
US4631585A — Apparatus for synchronizing the operation of a microprocessor with a television synchronization signal useful in generating an on-screen character display (Rca Corporation)
USRE32326E — Row grabbing system (IRD, Inc.)
US4684980A — System for controlling communications on a cable television network (American Television & Communications Corporation)
US4706121A — TV schedule system and process (Patrick Young)
US4710955A — Cable television system with two-way telephone communication path (General Instrument Corporation)
US4734764A — Cable television system selectively distributing pre-recorded video and audio messages (Cableshare, Inc.)
US4736422A — Encrypted broadcast television system (Independent Broadcasting Authority)
US4745468A — System for evaluation and recording of responses to broadcast transmissions (Kohorn H Von)
US4782387A — Two-channel coding of digital signals (Northern Telecom Limited)
JPS6446587A — Heat exchanger (Matsushita Refrigeration)
US4829569A — Communication of individual messages to subscribers in a subscription television system (Scientific-Atlanta, Inc.)
US4860379A — Data communications system (General Instrument Corporation)
US4862268A — Addressable cable television control system with video format data transmission (General Instrument Corporation)
US4868866A — Broadcast data distribution system (Mcgraw-Hill Inc.)
US4890322A — Method and apparatus for subscription broadcast (American Telephone And Telegraph Company)
US4890321A — Communications format for a subscription television system permitting transmission of individual text messages to subscribers (Scientific Atlanta, Inc.)
US4893248A — Monitoring and reporting system for remote terminals (Access Corporation)

Applicant-cited and other (1109)

US27810A — Mathatjs kabfbr
US33189A — Improvement in bee-hives
US422068A — Joseph cab us
US1927702A — Average price computer
US1992271A — Automatic stock quotation system
US2046381A — Bid and asked quotation system
US2117638A — Receiver control system
US2192217A — Stock quotation system
US2217881A — Aid to price estimation
US2236077A — Automatic stock quotation board
US2264563A — System for remote control of quotation boards
US2418127A — Filter system
US2510046A — Radio-wire signaling system
US2511085A — Cuing control for audio circuits
US2563448A — Subscription type signaling system
US2570209A — Television program metering system
US2573349A — Subscriber signaling system
US2619530A — Control system for subscription type television receivers
US2731197A — Pin box control mechanism
US2769023A — Prepaid entertainment distribution system
US2788387A — Subscription television system
US2855993A — System and apparatus for determining the listening or viewing habits of wave signal receiver users
US2864865A — Preparation of aromatic aldehydes and alcohols
US2864885A — Subscriber television system
US2866962A — Subscription television code determining arrangement
US2875270A — Subscription-television system
US2892882A — Television secrecy system with width modulated synchronizing pulses
GB857862A — Improvements relating to signal processing systems
US2969427A — Automatic broadcast programming system
US2972008A — Coding methods and system
US2995624A — Secrecy communication system
US3008000A — Action-reaction television system
US3011153A — Compatible ticker and automatic quotation board system
US3016091A — Vacuum control for pulp molding machines
US3029308A — Subscription television system
US3071649A — Cipher system for pulse code modulation communication system
US3071642A — Remote control system for televsion program distribution
US3107274A — Subscription television
US3133986A — Communication receiver
GB959274A — Cueing system for television
US3213201A — Multiplex transmission systems
US3238297A — Subscription television system
US3251051A — Serial binary transmitter of datamodulated reference potential crossing signals
US3304416A — Business order control system and apparatus
GB1066931A — Audience reaction system
US3336437A — Colour signal switching system of colour television receivers
USRE26331E — Automated sequential interrogation meter reading system oveb telephone lines
US3363250A — Monitoring system for remote radio control
US3366731A — Television distribution system permitting program substitution for selected viewers
US3368031A — Subscription television system having program use recording
US3371071A — Pressure sensitive adhesive compositions
US3387083A — Pay television system with billing transponder
US3387082A — Pay television audience survey and billing system
US3387268A — Quotation monitoring unit
US3390234A — Combination telephone fire alarm and meter reading system
US3430004A — Tone signal repertory dialer
US3440427A — Remote control system with a unitary cell bridge circuit
US3470309A — Billing and decoding box
US3472962A — Synchronization system for television signals with auxiliary information transmitted during the vertical blanking interval
US3475547A — Subscription television receiver with program use recording
US3478166A — Cryptographic subscription television system with grey sync and dual mode augmenting signals
US3478342A — Meter reading means and method
US3478164A — Scan converter and television scan converter system
US3485946A — Method for transmitting and receiving educational television programs
US3493674A — Television message system for transmitting auxiliary information during the vertical blanking interval of each television field
US3500327A — Data handling apparatus
US3526843A — Pulse width discriminator and shift pulse generator
GB1204190A — Multiplex communication system
US3531586A — Subscription program system with debit and credit signalling
US3536833A — Process for concealing communications signals
GB1213357A — Improvements relating to television systems
US3546684A — Programmable telemetry system
US3560936A — Message buffering communication system
US3564509A — Data processing apparatus
US3569937A — Tone signal communications apparatus
US3573747A — Instinet communication system for effectuating the sale or exchange of fungible properties between subscribers
US3576391A — Television system for transmitting auxiliary information during the vertical blanking interval
US3584142A — Interactive computer graphics using video telephone
US3586771A — Subscription television and the like systems
US3586767A — Reconstructable television transmission system
US3588357A — Automatic remote meter reading over telephone line
US3601528A — Television communications system with coding and decoding
US3606688A — Method and apparatus for teaching a multiplicity of students
US3609697A — Program security device
US3612752A — Subscription television system which receives either free broadcast signal or pay wired signals
US3624516A — Selective blanking of video display
US3627914A — Automatic television program control system
US3639686A — Television receiver cut-in device
US3648270A — Graphic display system
US3649749A — Apparatus permitting reliable selection of transmitted television message information
US3651261A — Message scrambling apparatus for use in pulsed signal transmission
US3657699A — Multipath encoder-decoder arrangement
US3659046A — Message scrambler for pcm communication system
US3666888A — Pcm-tv system using a unique word for horizontal time synchronization
US3676580A — Interrogated transponder system
US3683111A — Television bandwidth compression and expansion system
US3693090A — Wired broadcasting systems
US3703684A — Channel monitoring system for audience survey purposes
US3712956A — Information system
US3716835A — Personal stock quotation system
US3723637A — Color television system including additional information signals in pulse code on a special color burst
US3725672A — Method and circuit arrangement for displaying or recording a sequence of binary bits
US3726992A — Multiplex communication system for transmitting television and facsimile signals
US3728480A — Television gaming and training apparatus
US3729581A — Computer assisted dial access video retrieval for an instructional television system
US3731197A — Secrecy communication system
US3736369A — Technique for encoding and decoding scrambled t.v. transmissions by the simultaneous transmission of the encoding and decoding signals
US3737858A — Versatile telemetering system
US3743767A — Transmitter and receiver for the transmission of digital data over standard television channels
US3744043A — Environmental data system
US3746780A — Video display system
US3746799A — Method and apparatus for encoding and decoding analog signals
US3749845A — Digital data communication system
US3752908A — Catv audio interaction system
US3754211A — Fast error recovery communication controller
US3757225A — Communication system
US3761888A — Broadcast station logger and printout system
US3764983A — Calibration method in a data transmission system
US3769579A — Cable television monitoring system
US3773979A — Multiplexed video and subcarrier microwave communications system
US3773977A — Method of enciphered information transmission by time-interchange of information elements
USRE27810E — Output
US3777053A — Converter for catv
US3778721A — Automatic television programmer
US3778715A — Tdma satellite communications system with rapid automatic re-entry following brief outages of earth station equipment
US3789137A — Time compression of audio signals
US3789131A — Selective coding system for subscription television
US3794922A — Data sampling communication system
US3795763A — Digital television transmission system
US3798359A — Block cipher cryptographic system
US3798610A — Multiplexed intelligence communications
US3803491A — Communications system
DE2058681C3 — Device operating in television mode for sending, receiving and displaying coded information
US3806814A — Phantom subscriber
US3813482A — Method of and apparatus for scramble-encoded transmission and decoded reception for over the air and cable subscription television and the like
US3819852A — Method of reducing the interference signals during the transmission of af signals in time-compressed form
US3824467A — Privacy transmission system
US3824332A — Pay television system
US3825893A — Modular distributed error detection and correction apparatus and method
US3826863A — Subscription television system using audio and video carrier reversal
US3833757A — Electronic bilateral communication system for commercial and supplementary video and digital signaling
US3835387A — Control circuitry for information transmission system
US3836888A — Variable message length data acquisition and retrieval system and method using two-way coaxial cable
US3842196A — System for transmission of auxiliary information in a video spectrum
US3842206A — Transponder for meter reading telemetering system
US3845391A — Communication including submerged identification signal
US3848193A — Nationwide system for selectively distributing information
US3858240A — Reduced rate sampling process in pulse code modulation of analog signals
US3859596A — Cable television two-way communication system
DE2338380A1 — Wireless remote control for radio and TV receivers - has decoder and processor as separate unit for plugging into receiver
US3875329A — Frame grabbing system
US3882392A — Hotel-motel pay TV system
US3882289A — Binary coded rotary wafer type switch assembly
US3885089A — Television scrambling system
US3886454A — Control apparatus for a two-way cable television system
US3889054A — Row grabbing system
GB1396981A — Radio-frequency receiver with means for switching form a transmitter to a tape playback means
US3890461A — Ticket operated subscription television receiver
US3891792A — Television character crawl display method and apparatus
US3893031A — Synchronization system for voice privacy unit
US3894177A — Signal distribution system
US3894176A — Premium video distribution system
US3896262A — Subscription television jamming system
US3896266A — Credit and other security cards and card utilization systems therefore
US3898378A — Video signal transmission system
US3899639A — System and method for reading remotely located meters
US3899633A — Subscription television system
US3909512A — Sound information reproducing apparatus for use in a still picture broadcasting system
US3911419A — Controller for cursor positioning on a display medium
US3911216A — Nonlinear code generator and decoder for transmitting data securely
US3914534A — Methods and apparatus for scrambling and unscrambling premium television channels
US3916091A — Electronic communications system for supplementary video program distribution
US3919462A — Method and apparatus for scrambling and unscrambling communication signals
US3921151A — Apparatus for enciphering transmitted data by interchanging signal elements of the transmitted data without overlapping or omitting any elements within the transmitted signal train
US3922482A — Wired broadcasting systems
US3922492A — Remote meter reading transponder
US3924058A — Deionizing device for aerial electric lines
US3924059A — Pay television systems
US3924187A — Two-way cable television system with enhanced signal-to-noise ratio for upstream signals
US3927250A — Television system with transmission of auxiliary information
US3934079A — Bilateral communications system for distributing commerical and premium video signaling on an accountable basis
US3936594A — Secure television system
US3936868A — Television studio control apparatus
US3936593A — Scrambler and decoder for a television signal
US3943447A — Method and apparatus for bi-directional communication via existing CATV system
US3944931A — Multi-channel frequency converter having automatic control
US3947882A — Vending system for remotely accessible stored information
US3949313A — Demodulation system for digital information
US3950618A — System for public opinion research
US3950607A — Bandwidth compression system and method
AU481565B1 — Broadcast network signaling system and method
US3956615A — Transaction execution system with secure data storage and communications
US3958081A — Block cipher system for data security
US3958088A — Communications systems having a selective facsimile output
US3961137A — Biphase digital television systems
US3962535A — Conditional replenishment video encoder with sample grouping and more efficient line synchronization
US3970790A — Method and device for the coded transmission of messages
US3971888A — Synchronization system for variable length encoded signals
US3974451A — TV remote controller
US3975585A — Electronic communications system for supplementary video program distribution
US3978449A — Method and apparatus for in-band signalling in data transmission
US3982065A — Combined television/data receivers
US3982062A — Video encription system
US3982064A — Combined television/data transmission system
US3984637A — Computer terminal security system
US3987398A — Remote disconnect-reconnect tap for cable television systems
US3988528A — Signal transmission system for transmitting a plurality of information signals through a plurality of transmission channels
US3988550A — Telephone repertory dialer
US3990012A — Remote transceiver for a multiple site location in a two-way cable television system
US3993955A — Method of and apparatus for establishing emergency communications in a two-way cable television system
US3996583A — System for processing data signals for insertion in television signals
US3996586A — Magnetic tape pulse width to digital convertor
US3997718A — Premium interactive communication system
DE2453441B2 — METHOD FOR PERFORMING A DIGITAL BROADBAND SIGNAL TRANSMISSION
US4004085A — Receiving program-presetting system for a television receiver
US4006297A — Television signal coding system
US4008369A — Telephone interfaced subscription cable television system especially useful in hotels and motels
US4011414A — Automatic dial system for a subscriber telephone
US4013875A — Vehicle operation control system
US4015286A — Digital color television system
US4016361A — Apparatus for storing data broadcast in digital form for generating a character display or for recording such data for later playback
US4017697A — Keyboard membrane switch having threshold force structure
US4019201A — Method and apparatus for scrambling and unscrambling communication signals
US4020419A — Electronic system for automatically tuning to a selected television channel
US4024575A — Catv sine wave coding system
US4024574A — Validation method and apparatus for pay television systems
US4025947A — Video assignment systems
US4025948A — Coding system for pay television apparatus
US4026555A — Television display control apparatus
US4027331A — Digital television system
US4027100A — Code transmission system having buffers of approximately equal capacities on both transmitting and receiving sides
US4027267A — Method of decoding data content of F2F and phase shift encoded data streams
US4031543A — Communication system
US4031548A — Plural receiving and recording television system
US4032972A — Piggy back row grabbing system
US4035838A — Cable distribution system for wide-band message signals
US4042958A — Row grabbing system
US4044376A — TV monitor
US4045811A — Semiconductor integrated circuit device including an array of insulated gate field effect transistors
US4045814A — Method and apparatus for scrambling and unscrambling communication signals
US4047221A — Interframe coding apparatus
US4048619A — Secure two channel sca broadcasting system
US4049906A — Message network for the transmission of digital telegrams with an address consisting of routing words
US4052719A — Television receiver system having facility for storage and display of character information selected from digitally encoded broadcast transmissions
US4055848A — Signal processing for off-air video recorder
US4056684A — Surveillance system
US4057829A — Communications TV monitoring and control system
US4058830A — One way data transmission system
US4059729A — Method and system for selectively accessing multiplexed data transmission network for monitoring and testing of the network
US4060832A — Digit rate reducing method in video signal transmission
US4061879A — Method and apparatus for transmitting digital information signals from signal transmitters to signal receivers over switching apparatus
US4061577A — Fiber optic multiplex optical transmission system
US4068264A — Pay television system utilizing binary coding
US4068265A — Method and apparatus for sampling and reproducing television information
US4070693A — Secure television transmission system
US4074315A — Apparatus for reproducing multiplex video data
US4075660A — Pay television system with synchronization suppression
US4079419A — Method and apparatus for transmitting and receiving additional information in a television signal
US4081831A — High security subscription television system employing real time control of subscriber's program reception
US4081754A — Programmable television receiver controllers
US4081753A — Automatic programming system for television receivers
US4081832A — Pay television system, method and apparatus
US4081612A — Method for building-up of routing addresses in a digital telecommunication network
US4086434A — Remote condition reporting system
US4088958A — Integrated circuit for a programmable television receiver
US4095258A — Apparatus for decoding scrambled television and similar transmissions
US4096524A — Television receivers
US4096542A — Controller for video tape recorder
GB1515309A — Character display
US4099258A — System of data storage
US4104681A — Interleaved processor and cable head
US4104486A — System for accumulating data over nondedicated telephone lines
US4107734A — Television viewer reaction determining system
GB1523307A — Data slicing apparatus and method
US4112383A — Miller-encoded message decoder
US4112464A — Subscription TV decoder logic system
US4112317A — Pulse amplitude and width detection system
US4115807A — Telephone billing apparatus for a subscription television system
US4115662A — One way data transmission system
US4114841A — Magnetic torquing system for changing the spin rate of an orbiting satellite
US4118669A — Remote disconnect-reconnect tap for cable television systems
US4120030A — Computer software security system
US4120003A — Multiple channel CATV system utilizing row grabber interface as CATV input
US4124887A — Real time computer control system for automatic machines
US4126762A — Method and system for accumulating data over nondedicated telephone lines
US4130833A — Pay television system
US4131881A — Communication system including addressing apparatus for use in remotely controllable devices
US4134127A — Color television signal including auxiliary information
US4138726A — Airborne arrangement for displaying a moving map
US4139860A — Television receiver equipped for simultaneously showing several programs
US4141034A — Digital encoding of color video signals
US4142156A — Control signal apparatus for CATV system
US4145717A — Subscription TV audio carrier recovery system
US4148070A — Video processing system
GB1543502A — Remote control transmitter and receiver for use with a television receiver
US4156253A — Sound-in-video television transmission
US4156931A — Digital data communications device with standard option connection
US4160120A — Link encryption device
US4161728A — Electronic display apparatus
US4161751A — High-security cable television access system
US4162513A — Television system scheduler
US4162483A — Bilateral master station-plural satellite station signalling apparatus
US4163255A — Billing method and system for a subscriber of a pay television system
US4163254A — Method and system for subscription television billing and access
US4163252A — Subscription television decoder apparatus
DE2904981A1 — PROCEDURE FOR TRANSMISSION OF TELEVISION SIGNALS AND SYSTEM FOR CARRYING OUT THE PROCEDURE
DE2550624C3 — Transmission method for interactive message or data services of a broadband communication system
US4168396A — Microprocessor for executing enciphered programs
US4170782A — Programming and selection monitoring system for television receivers
US4171513A — Secure communications system
GB1554411A — Control systems
US4172213A — Byte stream selective encryption/decryption device
US4175267A — Method and apparatus of inserting an address signal in a video signal
GB1556366A — Receiving apparatus for combined television/data display
DE2823175A1 — DISPLAY DEVICE FOR TELETEXT CHARACTERS
US4178613A — Television picture special effects system using digital memory techniques
US4180709A — Data collection system using telephone lines
US4181886A — Distribution control unit providing simultaneous hybrid FDMA and SS-TDMA operation in a transitional satellite switched system
US4186413A — Apparatus for receiving encoded messages on the screen of a television receiver and for redisplay thereof on the same receiver screen in a readable format
US4189748A — Video bandwidth reduction system using a two-dimensional transformation, and an adaptive filter with error correction
US4195288A — Alarm system
US4196310A — Secure SCA broadcasting system including subscriber actuated portable receiving terminals
US4196448A — TV bandwidth reduction system using a hybrid discrete cosine DPCM
DE2831014A1 — Combined radio and television receiver - has shared audio circuitry allowing radio reception simultaneously with sound free picture reception
GB1565319A — 1-amino-alkyl-3,4-diphenyl-1hpyrazoles
US4199791A — Automatic recording system
US4199656A — Digital video signal processor with distortion correction
US4199781A — Program schedule displaying system
US4199809A — Programmable data terminal set
US4200770A — Cryptographic apparatus and method
US4200913A — Operator controlled programmable keyboard apparatus
US4201887A — Data telecommunications terminal
US4203130A — Information displaying system
US4203166A — Cryptographic file security for multiple domain networks
US4205343A — Television system transmitting enciphered data signals during field blanking interval
US4207524A — Radio coupled device for detecting and analyzing weak transmissions
GB2034995A — Control of broadcast radio and television receivers
US4213124A — System for digitally transmitting and displaying texts on television screen
US4214273A — Circuit for indicating antenna signal input level on television receiver screen
US4215369A — Digital transmission system for television video signals
US4215370A — Satellite video multiplexing communications system
US4215366A — Subscriber-limited reception television broadcast security encoder-decoder system
US4216497A — Apparatus for monitoring a multichannel receiver
US4217609A — Adaptive predictive coding system for television signals
US4218697A — Digital data transmission arrangement using a standard TV video
US4222073A — Multiplexed information signal receiving system
US4222068A — Subscription television apparatus and methods
US4224678A — Method and apparatus for implementing a processor based on the rationalized Haar transform for the purpose of real time compression of video data
US4225918A — System for entering information into and taking it from a computer from a remote location
US4225967A — Broadcast acknowledgement method and system
US4228543A — Programmable television receiver controllers
US4231031A — Remote control system capable of transmitting the information with the aid of an infra red beam using PPM or an ultrasonic beam using PDM
US4232193A — Message signal scrambling apparatus
US4233628A — NTSC receiver useable with Teletext/Viewdata information
US4236217A — Energy utilization or consumption recording arrangement
US4237486A — Compatible transmission of an encoded signal with a television
US4237484A — Technique for transmitting digital data together with a video signal
US4238854A — Cryptographic file security for single domain networks
US4238853A — Cryptographic communication security for single domain networks
US4243984A — Video display processor
US4245246A — Pay TV system
US4245252A — Television camera having a character display
GB2051527A — Method and apparatus for transmission of non-alpha numeric characters to a television receiver
GB1582563A — Digital control system and a method of transmitting control data in such a system
US4247106A — System arrangement for distribution and use of video games
US4247947A — Mobile radio data communication system
DE2853764A1 — Teaching system using television - has communications device programmed by pulses transmitted in suppressed parts of pictures
US4249211A — Composite image display apparatus
GB1584111A — Television receiver terminal
US4250489A — Distribution network communication system having branch connected repeaters
US4250524A — Validation apparatus in a pay television system
US4253114A — High security subscription television system employing real time control of subscriber's program reception
US4253157A — Data access system wherein subscriber terminals gain access to a data bank by telephone lines
US4258386A — Television audience measuring system
US4258423A — Microprocessor controlled digital detector
US4261006A — Remote control of video
US4262329A — Security system for data processing
US4264924A — Dedicated channel interactive cable television system
US4264925A — Interactive cable television system
US4266243A — Scrambling system for television sound signals
US4270145A — Television set which displays analog data relevant to the operation of the television set on its video display
US4272784A — Channel programing apparatus
US4273962A — Impulse metering of local telephone switching offices via a DAMA DOMSAT communication system
US4275411A — Dither-quantized signalling for color television
US4278973A — Video display terminal with partitioned screen
US4278993A — Color picture-in-picture television receiver
US4283602A — Cryptographically secure communication system
US4284976A — Interface between communication channel segments
US4286281A — Video format signal recording and reproducing device
US4287592A — Method and apparatus for interfacing stations in a multiloop communications system
US4288809A — Television receiver apparatus for selectively displaying a video picture or alphanumeric data information
US4290062A — System for digital transmission and text display
US4290141A — Electronic voting system
US4290142A — Interactive cable television system
US4292650A — Stv Subscriber address system
US4295223A — Digital signal/noise ratio amplifier apparatus for a communication system
US4295155A — Gray scale sync video processing system
US4301542A — Remote control of appliances
US4302628A — Analog signal encrypting and decrypting system
US4302775A — Digital video compression system and methods utilizing scene adaptive coding with rate buffer feedback
US4302771A — Wire broadcasting system with subscriber controlled switched program selection
US4303940A — Raster manipulated television receiver
US4303941A — Videotex system
US4305131A — Dialog between TV movies and human viewers
US4304990A — Multilevel security apparatus and method
US4306289A — Digital computer having code conversion apparatus for an encrypted program
US4306305A — PCM Signal transmitting system with error detecting and correcting capability
US4306250A — Television receiver arrangement having means for the selective use of separated or locally generated synchronizing signals
DE3020787A1 — METHOD FOR TRANSMITTING ADDITIONAL INFORMATION
US4307446A — Digital communication networks employing speed independent switches
US4308554A — Television viewer reaction determining system
US4308558A — Page selection device for videotext system
US4310854A — Television captioning system
US4312016A — Television signal switching apparatus
US4313132A — Cable TV security means
US4314367A — Switching circuit for digital packet switching network
US4315282A — Write and edit circuitry for electronic marking of displayed TV signal images
US4316245A — Apparatus and method for semaphore initialization in a multiprocessing computer system for process synchronization
US4316217A — Method and apparatus for connecting a cable television system to a video cassette recorder
US4316055A — Stream/block cipher crytographic system
GB2081948A — Remote control arrangements
US4318125A — Solid state digital audio scrambler system for teletransmission of audio intelligence through a television system
US4318127A — Multiplexed television signal processing system
US4318047A — Detection of narrow pulses
US4318128A — Process and device for retrieving digital data in the presence of noise and distortions
US4318126A — Multiplexed video transmission apparatus for satellite communications
US4319353A — Priority threaded message burst mechanism for TDMA communication
US4319079A — Crypto microprocessor using block cipher
US4322745A — Television signal scrambling method for CATV system
US4323921A — System for transmitting information provided with means for controlling access to the information transmitted
US4323922A — Television coding system with channel level identification
EP0049184A1 — Micro didactic device
DE2918846C3 — Arrangement for the screen listing of pre-programmable recording data from video recording and playback devices
US4325078A — Pay per view television control device
US4329675A — System for automatically substituting television signals at a head station for a cable network
US4329711A — Apparatus for encoding of information
US4329684A — Apparatus using a light sensing system for sensing time modulated information from a light emitting device
US4330794A — Multichannel subscription television system
US4331973A — Panelist response scanning system
US4332980A — Multiple services system using telephone local loop
US4333152A — TV Movies that talk back
US4333107A — Jam-resistant TV system
US4333109A — Intelligent teletext decoder
US4335426A — Remote processor initialization in a multi-station peer-to-peer intercommunication system
US4335402A — Information transmission during first-equalizing pulse interval in television
US4336553A — Method of coding audio and video signals
US4336559A — Recorded tape travel control system
US4337483A — Text video-transmission system provided with means for controlling access to the information
US4337480A — Dynamic audio-video interconnection system
US4337485A — Broadcast teletext system
US4338628A — Scrambled video communication system
US4339798A — Remote gaming system
US4340903A — Television camera
US4340906A — Video signal coding by video signal polarity reversal on the basis of brightness level comparison
US4341925A — Random digital encryption secure communication system
US4343042A — Bi-directional data transmission and control system
US4344090A — Television set with picture-storage means
US4347498A — Method and means for demand accessing and broadcast transmission among ports in a distributed star network
US4347618A — Apparatus for processing weather radar information
US4347532A — Picture display device arranged for displaying a mixed picture signal as an interlaced television picture
US4348696A — Television viewing control device
US4351028A — Meters for measuring electrical energy consumption
US4352011A — Subscription card for a videotex receiver
US4353088A — Coding and decoding system for video and audio signals
US4354201A — Television system with access control
US4355415A — Tuning mode arrangement useful for restricting channel selection to certain channels
US4355372A — Market survey data collection method
US4357548A — Circuit arrangement using emitter coupled logic and integrated injection logic
US4358672A — Pay per view television control device
US4358790A — Electrical data pulse slicing
GB2033699B — Error detection
US4360827A — Method and means for interactive audio and video conferencing
US4360881A — Energy consumption control system and method
US4360828A — Hotel/motel power load control and bilateral signalling apparatus
US4361903A — Data transmission process in a CATV system
US4361730A — Security terminal for use with two-way interactive cable system
US4361851A — System for remote monitoring and data transmission over non-dedicated telephone lines
US4361877A — Billing recorder with non-volatile solid state memory
US4361848A — System for digitally transmitting and displaying data on television receiver screen
US4364081A — Method and apparatus for processing a digital color video signal
US4365267A — Passive data monitor for use with polling pattern generator in CATV system
US4365249A — Line monitoring device in two-way data communication system
US4365110A — Multiple-destinational cryptosystem for broadcast networks
US4367548A — Subscriber station for providing multiple services to a subscriber
US4368486A — Television system using a marking code superimposed on the picture
US4369333A — Method and apparatus for enciphering and deciphering of information
US4369464A — Digital video signal encoding and decoding system
US4369462A — Coding system for pay television
US4374437A — Variable ramp speed TV tuning system for rapid channel tuning
US4374395A — Video system with picture information and logic signal multiplexing
GB2103455A — Method of transmitting an image and apparatus for carrying out the method
US4375651A — Selective video reception control system
US4375579A — Database encryption and decryption circuit and method using subkeys
US4375650A — System for processing video signals
DE2356969C2 — Arrangement for the wireless or cable transmission of pre-produced television recordings
USRE31182E — Packet-switched data communication system
US4378470A — Interface circuits for connection to non-dedicated telephone lines
US4379205A — Analog signal scrambling system
US4381562A — Broadcast type satellite communication systems
US4382256A — Paging receiver with display
US4383273A — Large scale, single chip integrated circuit television receiver subsystems
US4383257A — Message communication system with message storage
FR2516733A1 — Error controller for teletext TV decoder - has control keyboard substituted in when to manage microprocessor programme to inform of number, nature and position of errors, on screen
US4385384A — Modem diagnostic and control system
US4385324A — Wide screen image projection apparatus
US4386416A — Data compression, encryption, and in-line transmission system
US4386436A — Television remote control system for selectively controlling external apparatus through the AC power line
EP0020242B1 — Method for teletext character alignment and device for carrying out this method
US4388644A — Apparatus for monitoring a multichannel receiver
US4388639A — Color control circuit for teletext-type decoder
US4388664A — Apparatus for protecting vacuum interrupter type on-line tap changer
US4388643A — Method of controlling scrambling and unscrambling in a pay TV system
US4389671A — Digitally-controlled analog encrypton
US4390901A — Method and apparatus for controlling the operation of a television signal receiver
US4390904A — Automatic circuit and method for editing commercial messages from television signals
US4390898A — Scrambling and unscrambling video signals in a pay TV system
US4392135A — Paging receivers
US4393376A — Teletext interface for digital storage medium having synthetic video generator
US4393277A — Remote tuner control system
US4393404A — Special services teletext communications system
US4394762A — Pulse-code modulation signal processing circuit
US4394687A — Apparatus for decoding digital information processed for inclusion in wide band T.V. video signal
US4395757A — Process synchronization utilizing semaphores
US4396915A — Automatic meter reading and control system
US4396947A — Apparatus for encoding of information
US4396946A — Transmission of data with a video signal
US4398216A — Multiple signal transmission method and system, particularly for television
US4400587A — Overflow and diversion to a foreign switch
US4400717A — Color slow-scan TV system and method
USRE31375E — Transponder-responder system
US4404589A — Cable television with multi-event signal substitution
US4405946A — Television signal converting apparatus providing an on-screen tuning display
US4405942A — Method and system for secure transmission and reception of video information, particularly for television
US4408345A — Remote line monitoring method and device for CATV system
US4410911A — Multiple signal transmission method and system, particularly for television
US4411017A — Secure mobile telephone system
US4410917A — Method of and apparatus for recording information from a master medium onto a slave medium employing digital techniques
US4412244A — Switching circuit for television receiver on-screen display
US4413339A — Multiple error detecting and correcting system employing Reed-Solomon codes
US4413281A — Method for simultaneous teletext and analog signal transmission
US4414621A — Interactive visual communications system
US4414516A — Polarized signal receiver system
US4418425A — Encryption using destination addresses in a TDMA satellite communications network
US4419699A — Digital on video recording and playback system
US4420769A — Device for the automatic editing, at the receiver, of unwanted program material from broadcast electrical signals
US4420833A — Unidirectional data transmission system
US4422105A — Interactive system and method for the control of video playback devices
US4424532A — Coding and decoding system for video and audio signals
US4424533A — Phase distortion detection circuitry for low cost automatic equalizer
US4425578A — Monitoring system and method utilizing signal injection for determining channel reception of video receivers
US4425579A — Catv converter with keylock to favorite channels
US4425664A — Multiport programmable digital data set
US4425581A — System for overlaying a computer generated video signal on an NTSC video signal
US4426698A — Television digital data frame with error detection
US4427968A — Distribution network communication system with flexible message routes
US4429385A — Method and apparatus for digital serial scanning with hierarchical and relational access
GB2067379B — Test apparatus for monitoring digital transmissions
EP0035456B1 — Heating top, in particular for cooking, comprising an electric heating resistance and process for its manufacture
US4433207A — Cryptographic decoder for computer programs
US4433211A — Privacy communication system employing time/frequency transformation
US4434436A — Addressable premium channel obfuscation device for cable television systems
US4434438A — Low cost automatic equalizer
US4434464A — Memory protection system for effecting alteration of protection information without intervention of control program
US4434323A — Scrambler key code synchronizer
GB2126002A — Automatic control for recording apparatus
US4439785A — Subscriber television system
US4439784A — Power cutting device for terminal units of CATV system
DE3039949C2 — Message transmission device for special service traffic
US4446519A — Method and apparatus for providing security for computer software
US4449246A — Orderwire communication system
US4449247A — Local orderwire facility for fiber optic communication system
US4449249A — Televison programming information system
US4449145A — Intelligent teletext decoder
US4450442A — Display processor for superimposed-picture display system
US4450481A — Tamper-resistant, expandable communications system
US4450531A — Broadcast signal recognition system and method
US4451700A — Automatic audience survey system
US4451701A — Viewdata system and apparatus
US4454543A — Dynamic video scrambling
US4454538A — Data communication in CATV system
US4454594A — Method and apparatus to secure proprietary operation of computer equipment
US4456925A — Television/telephone system with automatic dialing
US4458268A — Sync displacement scrambling
US4458315A — Apparatus and method for preventing unauthorized use of computer programs
US4458109A — Method and apparatus providing registered mail features in an electronic communication system
US4461032A — CATV Service controller
US4460922A — Memory select system for an STV decoder
US4461002A — Digital signal receiver
US4462076A — Video game cartridge recognition and security system
US4462078A — Computer program protection method
US4467356A — Transmitting two television signals through one channel
US4467139A — Process and system for transmission of signed messages
US4468701A — Video signal actuated switch
US4471352A — Programmable paging encoder
US4471163A — Software protection system
US4471164A — Stream cipher operation using public key cryptosystem
US4472801A — Distributed prioritized concentrator
EP0046108B1 — Integrated interface circuit between a television receiver and its peripheral socket
US4473068A — Trochanteric basket
US4473824A — Price quotation system
US4475153A — Method and apparatus for automatic control of electronic equipment
US4475123A — Addressable subscriber cable television system
US4475189A — Automatic interactive conference arrangement
US4476535A — System for monitoring, transmitting and conditioning of information gathered at selected locations
US4476573A — Radio link remote control signaling system, and method
US4477830A — Picture display arrangement
US4484217A — Method and system for remote reporting, particularly for pay television billing
US4484328A — Television line multiplexed data communication system
US4484027A — Security system for SSTV encryption
US4484218A — Video distribution control system
US4486773A — CATV Pay system
US4486853A — Apparatus for receiving and displaying continuously updated data
GB2140963A — Video disc playback system
US4488179A — Television viewing center system
US4488289A — Interface facility for a packet switching system
US4489220A — Test set
US4489316A — Method and apparatus for minority view reduction
US4491945A — Fast packet switch
US4491983A — Information distribution system
US4494142A — Method of and apparatus for scrambled television program addressable subscription selection and decoding
US4494156A — Selectable format computer disk copier machine
US4494230A — Fast packet switching system
US4495654A — Remote controlled receiver with provisions for automatically programming a channel skip list
US4495623A — Digital data storage in video format
US4496975A — One-way data transmission systems
US4496976A — Reduced memory graphics-to-raster scan converter
US4496171A — Media guide
US4498098A — Apparatus for combining a video signal with graphics and text from a computer
US4500987A — Loop transmission system
US4503287A — Two-tiered communication security employing asymmetric session keys
US4503538A — Method and system to recognize change in the storage characteristics of a programmable memory
GB2090504B — Television receivers
US4504831A — Utility usage data and event data acquisition system
US4507680A — One way interactive multisubscriber communication system
US4509073A — Two-way cable-television system
US4510623A — Television channel lockout
US4512011A — Duplicated network arrays and control facilities for packet switching
US4513324A — Television scanning of wide frame motion picture films
US4513174A — Software security method using partial fabrication of proprietary control word decoders and microinstruction memories
US4514761A — Data encryption technique for subscription television system
US4520404A — System, apparatus and method for recording and editing broadcast transmissions
US4520392A — Teletext reception indicator
US4521806A — Recorded program communication system
CA1189612A — System for digital transmission and display of texts on a television set screen
FR2496376B1 — TELETEXT METHOD AND SYSTEM FOR DISPLAYING DATA ON THE SCREEN OF A TELEVISION RECEIVER
US4527194A — Channel assignment for CATV system
US4528588A — Method and apparatus for marking the information content of an information carrying signal
US4528589A — Method and system for subscription television billing and access
US4531021A — Two level encripting of RF signals
US4531020A — Multi-layer encryption system for the broadcast of encrypted information
US4532547A — Video device synchronization system
US4532540A — Teletext set-top converter with transparent mode
US4533948A — CATV Communication system
US4534024A — System and method for controlling a multiple access data communications system including both data packets and voice packets being communicated over a cable television system
US4533949A — Subscription television system
US4535355A — Method and apparatus for scrambling and unscrambling data streams using encryption and decryption
US4538174A — Two-way subscriber TV system with multiple subscriber's sets
USRE31977E — Digital computing system having auto-incrementing memory
US4539676A — Bulk/interactive data switching system
US4540849A — Meter interface unit for utility meter reading system
EP0056649B1 — Digital signal receiver
US4543616A — Video recording and display equipment
US4544963A — Read signal detection in ternary 3PM magnetic recording
US4546387A — Circuit for providing accurately spaced video and sound carriers
US4546382A — Television and market research data collection system and method
US4547804A — Method and apparatus for the automatic identification and verification of commercial broadcast programs
US4550407A — Method of analyzing broadcast data, a network analyzer implementing such a method, and receiver equipment using such an analyzer
US4553252A — Counting computer software cartridge
US4554418A — Information monitoring and notification method and apparatus
US4554584A — Video and audio blanking system
US4558180A — Programmable audio mixer
US4558464A — Address-programmable CATV converter
US4562306A — Method and apparatus for protecting computer software utilizing an active coded hardware device
US4562465A — Adaptive video descrambling system
US4562495A — Multiple system disk
US4563702A — Video signal scrambling and descrambling systems
US4566034A — Remote control transmitter arrangement for one or more television devices
US4567359A — Automatic information, goods and services dispensing system
US4567512A — Recorded program communication system
US4570930A — System, method, and station interface arrangement for playing video game over telephone lines
US4573151A — Interface unit for telephone system having remote units
US4573072A — Method for expanding interactive CATV displayable choices for a given channel capacity
US4574305A — Remote hub television and security systems
US4575750A — Communications apparatus for use with cable television systems
EP0077712B1 — Data broadcasting system with packets
DE3335082C2 — Method for programming a receiver, in particular a video recorder
US4577289A — Hardware key-on-disk system for copy-protecting magnetic storage media
US4578536A — Centerpoint automatic meter reading system
US4578718A — Control arrangement and method for video tape recorder
US4580165A — Graphic video overlay system providing stable computer graphics overlayed with video image
US4580134A — Color video system using data compression and decompression
US4583128A — Continuous tone recording system incorporating feedback control circuit
US4584641A — Copyprotecting system for software protection
US4586134A — Computer network system and its use for information unit transmission
US4589064A — System for controlling key storage unit which controls access to main storage
US4588991A — File access security method and means
US4590516A — Recorded program communication system
US4591664A — Multichannel interactive telephone answering apparatus
US4591906A — Wireless transmission from the television set to the television station
US4591248A — Dynamic audience responsive movie system
US4592546A — Game of skill playable by remote participants in conjunction with a live event
US4593353A — Software protection method and apparatus
US4593376A — System for vending program cartridges which have circuitry for inhibiting program usage after preset time interval expires
GB2167917A — Video record for use with computer controlled player/monitor systems
US4594609A — Scrambling system for television video signal
US4595951A — Teletext decoder using a common memory
US4595952A — Teletext decoder having a register array for operating on pixel words
US4596021A — Modem for switching between voice and data communications on a single telephone call
US4597058A — Cartridge programming system
US4598318A — Video encryption system
US4598288A — Apparatus for controlling the reception of transmitted programs
US4599611A — Interactive computer-based information display system
US4600942A — Secure coding and decoding system and method for television program signals
US4600921A — Full-field teletext system with dynamic addressability
US4600918A — Equipment for reproduction of alphanumerical data
US4602279A — Method for providing targeted profile interactive CATV displays
US4603232A — Rapid market survey collection and dissemination method
US4605964A — Method and apparatus for editing the output of a television set
US4605973A — System, apparatus and method for recording and editing broadcast transmissions
GB2164229B — Communications system
US4608456A — Digital audio scrambling system with error conditioning
US4611242A — Two mode scrambling system using identifier pulse in vertical blanking interval
US4611227A — Decoder for digital information T.V. signal
DE3112249C2 — Arrangement for displaying characters on a screen
US4613901A — Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
US4614972A — Teletext receiver
US4614971A — Error eliminating system for teletext
US4616262A — Method and apparatus for forming a combined image signal
US4616263A — Video subsystem for a hybrid videotex facility
US4620229A — Picture display device
US4620224A — Video scrambling technique for multiplexed analog component formats
US4620227A — Data decoder
US4621285A — Protected television signal distribution system
US4621259A — Consumer electronics equipment combination consisting of a television receiver and of a video recording and/or reproducing apparatus
US4623920A — Cable network data transmission system
US4625235A — Remote control switching of television sources
US4626909A — Video signal recording and reproducing system with automatic channel and time selection
US4626892A — Television system with menu like function control selection
US4628358A — Television signal encryption system with protected audio
US4630262A — Method and system for transmitting digitized voice signals as packets of bits
US4633297A — Television receiver having teletext processor with ROM for on-screen message
US4634807A — Software protection device
US4635121A — Arrangement for the programmable control of a radio and/or television receiver
US4634808A — Descrambler subscriber key production system utilizing key seeds stored in descrambler
US4636851A — Signal coding for secure transmission
US4636854A — Transmission system
US4636858A — Extracting digital data from a bus and multiplexing it with a video signal
US4638357A — Audio scrambler
US4638359A — Remote control switching of television sources
US4638181A — Signal source selector
US4639779A — Method and apparatus for the automatic identification and verification of television broadcast programs
US4639890A — Video display system using memory with parallel and serial access employing selectable cascaded serial shift registers
US4641253A — Process for synchronizing computer video with independent audio
US4641205A — Television system scheduler with on-screen menu type programming prompting apparatus
US4641307A — Data packet transmission using shared channel
US4642688A — Method and apparatus for creating encrypted and decrypted television signals
GB2141897B — Scrambled television sound signals
US4644396A — Gate circuit for central control of CATV system
US4646075A — System and method for a data processing pipeline
US4646145A — Television viewer reaction determining systems
US4647974A — Station signature system
US4647964A — Technique for testing television commercials
US4649533A — Method and apparatus for retrieving remotely located information
US4656629A — Digital signal transmitting and/or receiving system
US4658292A — Enciphering key distribution system for subscription TV broadcast or catv system
US4658093A — Software distribution system
US4658290A — Television and market research data collection system and method
DE3337204C2 — Method for programming a receiver, in particular a video recorder
US4663735A — Random/serial access mode selection circuit for a video memory system
DE3328001C2 — Device for automatically switching the recording mode of a video recorder on and off
US4677434A — Access control system for transmitting data from a central station to a plurality of receiving stations and method therefor
US4677552A — International commodity trade exchange
US4677466A — Broadcast program identification method and apparatus
US4677611A — Apparatus and method for executing communication protocol conversions
US4677685A — Method and apparatus for downloading a code defining the channel transmission format employed in an addressable CATV system
US4680797A — Secure digital speech communication
US4680581A — Local area network special function frames
US4682292A — Fault tolerant flight data recorder
US4685056A — Computer security device
US4685131A — Program blocking method for use in direct broadcast satellite system
US4686564A — Communication data processing device of cable television system
US4688247A — Pay TV scrambling by audio encryption
US4688105A — Video recording system
US4688197A — Control of data access to memory for improved video system
US4689619A — Method and apparatus for polling subscriber terminals
US4689661A — Method of simultaneously transmitting a plurality of television signals on a single radio link and apparatus adapted to carry out said method
US4689022A — System for control of a video storage means by a programmed processor
US4691351A — Television signal receiving apparatus
US4692817A — Programmed conversation recording system
US4692819A — Method and apparatus for controlling the position of a transported web
US4694491A — Cryptographic system using interchangeable key blocks and selectable key fragments
US4694490A — Signal processing apparatus and methods
US4695953A — TV animation interactively controlled by the viewer
US4695880A — Electronic information dissemination system
US4695879A — Television viewer meter
US4696034A — High security pay television system
US4697281A — Cellular telephone data communication system and method
EP0132007B1 — Authorising coded signals
US4701794A — Television receiver comprising a teletext decoding circuit and a page number memory
US4706282A — Decoder for a recorder-decoder system
US4706109A — Television transmission system
US4707828A — Multiaccess communication system
US4709418A — Wideband cable network
US4710800A — Apparatus for allowing operator selection of a color region of a video image for receiving color corrections
US4710919A — Multiplex system for automatic meter reading
US4712239A — Security arrangement for downloadable cable television converters
US4712238A — Selective-subscription descrambling
US4712105A — Remote control hand apparatus for operating different modules
US4713837A — Communication network
US4716588A — Addressable subscription television system having multiple scrambling modes
US4718107A — Parental control for CATV converters
US4720819A — Method and apparatus for clearing the memory of a video computer
US4723302A — Method and apparatus for determining channel reception of a receiver
US4722526A — Game method and apparatus for use while viewing a sporting event
US4724491A — Inserting television advertising spots automatically
US4725886A — Communications system having an addressable receiver
US4728949A — Remote control device for controlling various functions of one or more appliances
US4731679A — Method and apparatus for transporting a recording medium with an adaptive velocity change profile
US4733301A — Signal matching signal substitution
US4734907A — Broadcast packet switching network
US4736420A — Video scrambling by segmenting video information lines
US4737993A — Cable broadcast TV receiver with automatic channel search responsive to mode change
US4739510A — Direct broadcast satellite signal transmission system
US4740890A — Software protection system with trial period usage code and unlimited use unlocking code both recorded on program storage media
US4742543A — Video transmission system
US4742516A — Method for transmitting voice information
US4744080A — Apparatus for receiving digital sound/data information
US4745549A — Method of and apparatus for optimal scheduling of television programming to maximize customer satisfaction
US4745598A — Method and apparatus for maintaining a dynamic logical ring in a token passing LAN
US4747139A — Software security method and systems
US4747081A — Video display system using memory with parallel and serial access employing serial shift registers selected by column address
US4748560A — Occupancy control system for plural serial buses
US4748619A — Packet demultiplexing of a mac/packet broadcast signal
EP0055167B1 — Method and apparatus for displaying messages on a raster-scanned display system, e.g. a crt screen, using a segmented memory
US4750213A — Method and system for editing unwanted program material from broadcast signals
US4750036A — Interactive television and data transmission system
US4751665A — Systolic super summation device
US4751578A — System for electronically controllably viewing on a television updateable television programming information
US4751732A — Broadcasting system
US4752834A — Reciprocating recording method and apparatus for controlling a video recorder so as to edit commercial messages from a recorded television signal
US4754326A — Method and apparatus for assisting user of information retrieval systems
US4754426A — System for controlling communications on a cable television network
US4755883A — Removable information inputting device for an electronic recording apparatus
US4755871A — Control of rf answer pulses in a TV answer back system
US4760442A — Wideband digital signal distribution system
US4761646A — Method and system for addressing and controlling a network of modems
US4763317A — Digital communication network architecture for providing universal information services
US4768229A — Restrictive access control system
US4768144A — Method and apparatus for retrieving information distributed over nonconsecutive pages
US4768087A — Education utility
US4768228A — Data acquisition device
US4768110A — Video cassette recorder having dual decks for selective simultaneous functions
US4771456A — Cable television channel selector/descrambler for use with cable-ready video applicances
US4772887A — Individual simulcast station control decoder
US4774583A — Video signal processing systems
US4775935A — Video merchandising system with variable and adoptive product sequence presentation order
US4777354A — System for controlling the supply of utility services to consumers
US4780910A — Display for a remote receiver in an electrical utility load management system
US4782401A — Editing method and apparatus for commercials during video recording
US4783846A — Switchable signal source module for use with cable television converter
US4785420A — Audio/telephone communication system for verbally handicapped
US4787063A — Acquisition and transmission system for a recorder and a computer center
US4786979A — Method and system for picture-correct transfer of motion picture film scenes to magnetic tape
US4787085A — Digital signal transmitting system
US4789863A — Pay per view entertainment system
US4792849A — Digital interactive communication system
US4794643A — Method for developing a key signal for descrambling in television broadcasting
US4796181A — Billing system for computer software
USRE32835E — Polarized signal receiver system
US4802114A — Programmable remote control transmitter
US4803725A — Cryptographic system using interchangeable key blocks and selectable key fragments
US4805020A — Television program transmission verification method and apparatus
US4805014A — Signal transmission system for a CATV system
US4807031A — Interactive video method and apparatus
US4809274A — Digital audio companding and error conditioning
US4809267A — Packet data communication system with ring type transmission line
US4813011A — Data processing peripheral subsystems having a controller and a plurality of peripheral devices
US4812843A — Telephone accessible information system
US4814756A — Video display control system having improved storage of alphanumeric and graphic display data
US4815129A — Video encryption system
US4816904A — Television and market research data collection system and method
US4816905A — Telecommunication system with video and audio frames
US4821097A — Apparatus and method for providing digital audio on the sound carrier of a standard television signal
US4821102A — Video display system with selective display of operating conditions
US4821032A — Communication system for video information apparatus
US4825050A — Security transaction system for financial data
US4827508A — Database usage metering and protection system and method
US4829372A — Presentation player
US4831526A — Computerized insurance premium quote request and policy issuance system
US4833710A — Pay television system
US4835777A — Radio paging receiver including duplicate page detection and error correction capability
US4837858A — Subscriber unit for a trunked voice/data communication system
US4837799A — Telephone line communications control system
US4839917A — Universal line status monitoring and response system
US4841386A — Cassette recorder with recording programming
US4843482A — Device for recording satellite TV broadcasts
US4845491A — Pager based information system
US4847699A — Method for providing an interactive full motion synched compatible audio/visual television display
US4847700A — Interactive television system for providing full motion synched compatible audio/visual displays from transmitted television signals
USD302178S — Video self-service terminal
US4847698A — Interactive television system for providing full motion synched compatible audio/visual displays
US4849817A — Video system, method and apparatus for incorporating audio or data in video scan intervals
US4855842A — Dedicated programmable controller for interactive video disc system
US4857999A — Video monitoring system
US4864615A — Reproduction of secure keys by using distributed key generation data
US4866706A — Token-passing local area network with improved throughput
US4876736A — Method and apparatus for determining channel reception of a receiver
US4876592A — System for merchandising and the evaluation of responses to broadcast transmissions
GB2185670B — Improvements in or relating to viewdata systems
US4879611A — Record mode setting apparatus responsive to transmitted code containing time-start information
US4885579A — Device for the remote control of a videorecorder or a videoreceiver
US4885632A — System and methods for monitoring TV viewing system including a VCR and/or a cable converter
US4885775A — Information display scheme for subscribers of a subscription television system
US4887172A — Apparatus and method for cueing a video tape recorder
US4887296A — Cryptographic system for direct broadcast satellite system
US4888638A — System for substituting television programs transmitted via telephone lines
US4888796A — Program material screening device
US4890320A — Television broadcast system for selective transmission of viewer-chosen programs at viewer-requested times
US4891703A — Method and system for determining video program system signals
US4897867A — Method of and an arrangement for forwarding a customer order
DE3143627C2
US4907273A — High security pay television system
US4907260A — Telephone line communications control system
US4908707A — Video cassette recorder programming via teletext transmissions
US4908713A — VCR Programmer
US4908859A — Receiver access interface to service components in television channel
US4908845A — Audio/telephone communication system for verbally handicapped
US4908834A — High security pay television system
USRE33189E — Security system for SSTV encryption
US4912552A — Distributed monitoring system
US4914517A — Tuner control apparatus having tune-by-label capability and using alphabetical label storage
US4916539A — Communications system having receivers which can be addressed in selected classes
US4926255A — System for evaluation of response to broadcast transmissions
US4930158A — Selective video playing system
US4931877A — Method and apparatus for producing a test signal for use in a video recorder
US4931871A — Method of and system for identification and verification of broadcasted program segments
US4935870A — Apparatus for downloading macro programs and executing a downloaded macro program responding to activation of a single key
US4937821A — Pipeline information delivery system
US4939773A — Multiple party telephone control system
US4941040A — Cable television system selectively distributing pre-recorded video and audio messages
US4942616A — Interactive synthesized speech quotation system for brokers
US4943963A — Data collection and transmission system with real time clock
US4945563A — Video system and method for controlled viewing and videotaping
US4945412A — Method of and system for identification and verification of broadcasting television and radio program segments
US4947302A — Improvements to control systems for variable parameter lighting fixtures
US4949187A — Video communications system having a remotely controlled central source of video and audio data
US4954899A — Reception control apparatus for a television receiver
US4959720A — Tuner control apparatus having tune-by-label capability
US4963995A — Audio/video transceiver apparatus including compression means
US4963994A — VCR programmer
US4965825A — Signal processing apparatus and methods
US4967273A — Television program transmission verification method and apparatus
US4969209A — Broadcast receiver capable of selecting stations based upon geographical location and program format
US4974252A — Interactive commercial/entertainment network
US4975951A — IPPV programming distribution control system
US4977594A — Database usage metering and protection system and method
US4977455A — System and process for VCR scheduling
US4982430A — Bootstrap channel security arrangement for communication network
US4989104A — Apparatus for recording and quickly retrieving video signal parts on a magnetic tape
US4991011A — Interactive television terminal with programmable background audio or video
US4991025A — Arrangement for automatically switching a videorecorder on and off in the absence of a code signal but in presence of a FBAS signal
US4993003A — Apparatus for updating time-of-day information in a signal
US4993066A — Method for television scrambling
US4994908A — Interactive room status/time information system
US4995078A — Television broadcast system for selective transmission of viewer-chosen programs at viewer-requested times
US5001554A — Terminal authorization method
US5002491A — Electronic classroom system enabling interactive self-paced learning
US5003384A — Set-top interface transactions in an impulse pay per view television system
US5003591A — Functionally modifiable cable television converter system
US5010571A — Metering retrieval of encrypted data stored in customer data retrieval terminal
US5010459A — Console/lamp unit coordination and communication in lighting systems
US5012510A — Dynamic callback technique
US5013038A — method of evaluating data relating to a common subject
US5014125A — Television system for the interactive distribution of selectable video presentations
US5016272A — Home video system
US5016273A — Dual communication mode video tape recorder
US5027400A — Multimedia bidirectional broadcast system
US5029207A — External security module for a television signal decoder
US5036537A — Geographic black-out method for direct broadcast satellite system
US5038211A — Method and apparatus for transmitting and receiving television program information
USRE33662E — TV animation interactively controlled by the viewer
US5045947A — Television receiver having memory control for tune-by-label feature
US5045816A — Binary phase shift key modulator with programmable level control
US5045848A — Method of encoding market data and transmitting by radio to a plurality of receivers
US5047867A — Interface for a TV-VCR system
US5047928A — Billing system for computer software
US5050213A — Database usage metering and protection system and method
US5055924A — Remote-controlled substitution of a defined program part of a tv program by a separately transmitted program part for defined, selected receivers, household terminal for executing the method and method for operating a household terminal
US5057932A — Audio/video transceiver apparatus including compression means, random access storage means, and microwave transceiver means
US5057915A — System and method for attracting shoppers to sales outlets
US5058160A — In-band controller
US5060140A — Universal programmable data communication connection system
US5062136A — Telecommunications system and method
US5067149A — Telephone line communications control system with dynamic call streaming
US5072418A — Series maxium/minimum function computing devices, systems and methods
US5075771A — Method of and apparatus for optimal scheduling of television programming to maximize customer satisfaction
US5083271A — Tournament data system with game score communication between remote player terminal and central computer
US5083800A — Game of skill or chance playable by several participants remote from each other in conjunction with a common event
USRE33808E — Cable television with multi-event signal substitution
US5089885A — Telephone access display system with remote monitoring
US5093921A — Initialization technique and apparatus for set top converters
US5093718A — Interactive home information system
US5099348A — Display for remote receiver in a utility management system
US5101267A — Wide area real-time T-V audience polling system with local area stations linked by satellite
US5108115A — Interactive game show and method for achieving interactive communication therewith
US5111401A — Navigational control system for an autonomous vehicle
US5113496A — Bus interconnection structure with redundancy linking plurality of groups of processors, with servers for each group mounted on chassis
US5120076A — Method of evaluating data relating to a common subject
US5124942A — Machine interface with cyclically displayed hierarchical menus and user selection of menu items by actuation of a single switch
US5132992A — Audio and video transmission and receiving system
US5133079A — Method and apparatus for distribution of movies
USRE34034E — Cellular telephone data communication system and method
US5142690A — Cable television radio frequency data processor
US5142677A — Context switching devices, systems and methods
US5144663A — Method of interactive communication between a subscriber and a decoder of a system of pay-television and decoder thereof
US5144664A — Apparatus and method for upgrading terminals to maintain a secure communication network
US5148482A — Layered session data unit frame
US5152011A — Broadcast receiver capable of automatic station identification and format-scanning based on an internal database updatable via data reception over the airwaves
US5152012A — Broadcast receiver capable of automatically updating location and performing spiral searching
US5151789A — System and method for automatic, unattended recording of cable television programs
US5155812A — Devices and method for generating and using systems, software waitstates on address boundaries in data processing
US5155591A — Method and apparatus for providing demographically targeted television commercials
US5155590A — System for data channel level control
US5157716A — Dynamic callback technique
US5163024A — Video display system using memory with parallel and serial access employing serial shift registers selected by column address
US5164839A — Method for handling audio/video source information
US5172111A — Stored media screening device
US5172413A — Secure hierarchial video delivery system and method
US5177604A — Interactive television and data transmission system
US5181113A — Method of storing and editing data in a television system and apparatus therefor
US5185796A — Encryption synchronization combined with encryption key identification
US5187797A — Machine interface system with hierarchal menus allowing user sequencing and selection of menu items by actuation of three switches
US5191410A — Interactive multimedia presentation and communications system
US5195092A — Interactive multimedia presentation & communication system
US5195134A — Transmitting, receiving, and automatic recording system for programs with time and channel information
US5202916A — Signal proessing circuit for use in telemetry devices
US5204768A — Remote controlled electronic presentation system
US5208665A — Presentation player for an interactive digital communication system
US5212553A — Television receiver with selective menu display
US5213337A — System for communication using a broadcast audio signal
US5216504A — Automatic precision video monitor alignment system
US5216552A — Video cassette recorder having dual decks for selective simultaneous functions
US5220501A — Method and system for remote delivery of retail banking services
US5222137A — Dynamic encryption key selection for encrypted radio transmissions
US5223924A — System and method for automatically correlating user preferences with a T.V. program information database
US5226177A — Real-time wireless audience response system
US5225902A — Automatic frequency selection in a bi-directional cable television system
US5227874A — Method for measuring the effectiveness of stimuli on decisions of shoppers
US5231493A — Video receiver with permanent electronic program journal
US5235619A — Cable television radio frequency subscriber data transmission apparatus and rf return method
US5235634A — Apparatus and method for activating an inbound telemetry device
US5235415A — Device for the intelligible consultation of data relating to the fees programs of a subscription television and/or radio service
US5237417A — Apparatus for displaying television receiver operational parameters in a separate area of the screen
US5237610A — Independent external security module for a digitally upgradeable television signal decoder
US5239575A — Telephone dial-inbound data acquisition system with demand reading capability
US5247575A — Information distribution system
US5247364A — Method and apparatus for tuning data channels in a subscription television system having in-band data transmissions
US5251324A — Method and apparatus for generating and collecting viewing statistics for remote terminals in a cable television system
US5252077A — Process for materializing virtual interactivity between an individual and a data support
US5251909A — Secured high throughput data channel for public broadcast system
US5253275A — Audio and video transmission and receiving system
US5253066A — TV recording and viewing control system
US5254977A — Color display
US5255086A — Method and apparatus for RF data transfer in a CATV system
US5260778A — Apparatus for selective distribution of messages over a communications network
US5267305A — Transparent inband signaling
US5266944A — Electronic system and method for monitoring abusers for compliance with a protective order
US5267865A — Interactive computer aided natural learning method and apparatus
US5270809A — Data return for a television transmission system
US5276678A — Distributed switching and telephone conferencing system
US5283819A — Computing and multimedia entertainment system
US5283639A — Multiple media delivery network method and apparatus
EP0583196A1 — Transaction processing system utilizing teletext broadcasting system and terminal used in the transaction processing system
US5291554A — Shared-price custom video rentals via interactive TV
US5293357A — Method and apparatus for controlling a television program recording device
US5294229A — Teacher and parent interactive communication system incorporating pocket sized portable audio numeric terminals
US5301233A — Process for the transmission and reception of personalized programs
US5303042A — Computer-implemented method and apparatus for remote educational instruction
US5307173A — Apparatus and method using compressed codes for television program record scheduling
US5313618A — Shared bus in-circuit emulator system and method
US5321750A — Restricted information distribution system apparatus and methods
US5327421A — Apparatus for interfacing between telecommunications call signals and broadband signals
US5327554A — Interactive terminal for the access of remote database information
US5335276A — Communication system and methods for enhanced information transfer
US5343300A — Apparatus for providing TV program information
US5343239A — Transaction based interactive television system
US5345446A — Establishing telecommunications call paths in broadband communication networks
US5345501A — Telephone central office based method of and system for processing customer orders
US5345445A — Establishing telecommunications calls in a broadband network
US5351130A — Satellite receiver with improved memory back-up and loading capabilities
US5353121A — Television schedule system
US5351970A — Methods and apparatus for playing bingo over a wide geographic area
US5367330A — Pay-per-view television delivery system
US5374951A — Method and system for monitoring television viewing
US5414773A — CATV systems
US5420647A — T.V. viewing and recording system
US5420923A — Addressed messaging in a cable television system
US5430552A — Device for programming a video recorder and video recorder comprising the device
US5432558A — Circuit and method for transmitting/receiving a code-inserted video signal
US5459789A — Packet TV program component detector
US5465385A — CATV system with an easy program reservation
US5475754A — Packet video signal inverse transport processor memory address circuitry
US5485509A — Telemetry device including a dynamic off-hook detector
US5488654A — Telemetry device including a dynamic off-hook detector capable of operationg in a pulse-dialing environment
US5534883A — Video signal interface
US5535362A — Data transfer control apparatus wherein a time value is compared to a clocked timer value with a comparison of the values causing the transfer of bus use right
US5548338A — Compression of an electronic programming guide
US5552833A — Transmission system and receiver using teletext information for programming video recorder
PL204525B1 — Methods and compositions utilizing quinazolinones

Classification

H04N21/236primary — Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
H04N21/43072primary — Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
G01R1/071 — Non contact-making probes containing electro-optic elements
G06Q30/0251 — Targeted advertisements
H04H20/14 — Arrangements for observation, testing or troubleshooting for monitoring programmes
H04H20/28 — Arrangements for simultaneous broadcast of plural pieces of information
H04H20/30 — Arrangements for simultaneous broadcast of plural pieces of information by a single channel
H04H2201/70 — Aspects of broadcast communication characterised in that receivers can be addressed
H04H40/18 — Arrangements characterised by circuits or components specially adapted for receiving
H04H60/13 — Arrangements for device control affected by the broadcast information
H04H60/21 — Billing for the use of broadcast information or broadcast-related information
H04H60/23 — Arrangements for conditional access to broadcast information or to broadcast-related services using cryptography, e.g. encryption, authentication, key distribution
H04H60/27 — Arrangements for recording or accumulating broadcast information or broadcast-related information
H04H60/31 — Arrangements for monitoring the use made of the broadcast services
H04H60/33 — Arrangements for monitoring the users' behaviour or opinions
H04H60/37 — Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID
H04H60/40 — Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast time
H04H60/41 — Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying broadcast time or space for identifying broadcast space, i.e. broadcast channels, broadcast stations or broadcast areas
H04H60/94 — Telephonic networks
H04K1/00 — Secret communication
H04N21/00 — Selective content distribution, e.g. interactive television or video on demand [VOD]
H04N21/20 — Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
H04N21/21 — Server components or server architectures
H04N21/21815 — Source of audio or video content, e.g. local disk arrays comprising local storage units
H04N21/222 — Secondary servers, e.g. proxy server, cable television Head-end
H04N21/235 — Processing of additional data, e.g. scrambling of additional data or processing content descriptors
H04N21/2351 — Processing of additional data, e.g. scrambling of additional data or processing content descriptors involving encryption of additional data
H04N21/23892 — Multiplex stream processing, e.g. multiplex stream encrypting involving embedding information at multiplex stream level, e.g. embedding a watermark at packet level
H04N21/2407 — Monitoring of transmitted content, e.g. distribution time, number of downloads
H04N21/25 — Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
H04N21/2541 — Rights Management
H04N21/2543 — Billing, e.g. for subscription services
H04N21/41 — Structure of client; Structure of client peripherals
H04N21/4117 — Peripherals receiving signals from specially adapted client devices for generating hard copies of the content, e.g. printer, electronic paper
H04N21/4131 — Peripherals receiving signals from specially adapted client devices home appliance, e.g. lighting, air conditioning system, metering devices
H04N21/4135 — Peripherals receiving signals from specially adapted client devices external recorder
H04N21/41415 — Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance involving a public display, viewable by several users in a public space outside their home, e.g. movie theatre, information kiosk
H04N21/4143 — Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a Personal Computer [PC]
H04N21/4184 — External card to be used in combination with the client device, e.g. for conditional access providing storage capabilities, e.g. memory stick
H04N21/426 — Internal components of the client ; Characteristics thereof
H04N21/42684 — Client identification by a unique number or address, e.g. serial number, MAC address, socket ID
H04N21/4307 — Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
H04N21/432 — Content retrieval operation from a local storage medium, e.g. hard-disk
H04N21/4325 — Content retrieval operation from a local storage medium, e.g. hard-disk by playing back content from the storage medium
H04N21/434 — Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
H04N21/4353 — Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving decryption of additional data
H04N21/43615 — Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals
H04N21/4363 — Adapting the video stream to a specific local network, e.g. a Bluetooth® network
H04N21/4382 — Demodulation or channel decoding, e.g. QPSK demodulation
H04N21/4385 — Multiplex stream processing, e.g. multiplex stream decrypting
H04N21/4405 — Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
H04N21/44227 — Monitoring of local network, e.g. connection or bandwidth variations; Detecting new devices in the local network
H04N21/4432 — Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server
H04N21/45 — Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
H04N21/4532 — Management of client data or end-user data involving end-user characteristics, e.g. viewer profile, preferences
H04N21/454 — Content or additional data filtering, e.g. blocking advertisements
H04N21/458 — Scheduling content for creating a personalised stream, e.g. by combining a locally stored advertisement with an incoming stream; Updating operations, e.g. for OS modules ; time-related management operations
H04N21/4622 — Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
H04N21/47 — End-user applications
H04N21/472 — End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
H04N21/488 — Data services, e.g. news ticker
H04N21/4888 — Data services, e.g. news ticker for displaying teletext characters
H04N21/63 — Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
H04N21/633 — Control signals issued by server directed to the network components or client
H04N21/6543 — Transmission by server directed to the client for forcing some client operations, e.g. recording
H04N21/6582 — Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number
H04N21/818 — OS software
H04N21/8352 — Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]
H04N21/8355 — Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed
H04N5/46 — Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
H04N5/782 — Television signal recording using magnetic recording on tape
H04N7/08 — Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
H04N7/084 — Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
H04N7/14 — Systems for two-way working
H04N7/173 — Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
H04N7/24 — Systems for the transmission of television signals using pulse code modulation

Family

US8191091B1 — B1 (2012)
US8555310B1 — B1 (2013)
US8839293B1 — B1 (2014)
US7864248B1 — B1 (2011)
US8558950B1 — B1 (2013)
US7908638B1 — B1 (2011)
US7856649B1 — B1 (2010)
US7752649B1 — B1 (2010)
USRE47867E1 — USRE47867E1 (2020)
US7861278B1 — B1 (2010)
US8566868B1 — B1 (2013)
US8804727B1 — B1 (2014)
US8973034B1 — B1 (2015)
USRE47968E1 — USRE47968E1 (2020)
US8675775B1 — B1 (2014)
US7747217B1 — B1 (2010)
US7958527B1 — B1 (2011)
US7889865B1 — B1 (2011)
US5335277A — A (1994)
US8843988B1 — B1 (2014)
USRE48682E1 — USRE48682E1 (2021)
US5887243A — A (1999)
US8893177B1 — B1 (2014)
US7764685B1 — B1 (2010)
US8635644B1 — B1 (2014)
US8601528B1 — B1 (2013)
US7966640B1 — B1 (2011)
US5233654A — A (1993)
US7860131B1 — B1 (2010)
US10334292B1 — B1 (2019)
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13 foreign family members: EP0382764B1, ATE151582T1, JPH03500232A, AU2534188A, DE3855866T2, DE3855866D1, EP0382764A4, JP2676710B2, AU624087B2, WO1989002682A1, EP0752767A3, EP0382764A1, EP0752767A2

Abstract

A unified system of programming communication. The system encompasses the prior art (television, radio, broadcast hardcopy, computer communications, etc.) and new user specific mass media. Within the unified system, parallel processing computer systems, each having an input (e.g., 77 ) controlling a plurality of computers (e.g., 205 ), generate and output user information at receiver stations. Under broadcast control, local computers ( 73, 205 ), combine user information selectively into prior art communications to exhibit personalized mass media programming at video monitors ( 202 ), speakers ( 263 ), printers ( 221 ), etc. At intermediate transmission stations (e.g., cable television stations), signals in network broadcasts and from local inputs ( 74, 77, 97, 98 ) cause control processors ( 71 ) and computers ( 73 ) to selectively automate connection and operation of receivers ( 53 ), recorder/players ( 76 ), computers ( 73 ), generators ( 82 ), strippers ( 81 ), etc. At receiver stations, signals in received transmissions and from local inputs ( 225, 218, 22 ) cause control processors ( 200 ) and computers ( 205 ) to automate connection and operation of converters ( 201 ), tuners ( 215 ), decryptors ( 224 ), recorder/players ( 217 ), computers ( 205 ), furnaces ( 206 ), etc. Processors ( 71, 200 ) meter and monitor availability and usage of programming.

Also asserted by ContentNexus LLC

US 8,559,635 — Signal processing apparatus and methods (7 defendants)

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