US 11,051,121 Spectral defect compensation for crosstalk processing of spatial audio signals
3 defendants · 3 suits · updated October 6, 2026
Also cited as U.S. Patent No. 11,051,121 · US11051121B2 · US 11,051,121 B2 · 11051121 · the '121 patent
BOOMCLOUD 360, INC. has filed 3 patent-infringement suits on US 11,051,121, "Spectral defect compensation for crosstalk processing of spatial audio signals" since August 13, 2026, 2 of them in the W.D. Tex., against 3 distinct defendants including APPLE INC., GOOGLE LLC and SAMSUNG ELECTRONICS CO., LTD.. The patent was granted June 29, 2021 on a priority date of June 20, 2018. Its abstract opens: "An audio system provides for spatial enhancement, crosstalk processing, and crosstalk compensation of an input audio signal." The examiner cited 1 reference during prosecution.
- Assignee
- Boomcloud 360 Inc
- Priority date
- June 20, 2018
- Granted
- June 29, 2021
- Expires
- June 20, 2038
- Status
- Active
- Claims
- 30 (3 independent)
- Inventors
- Zachary Seldess
- Full text
- Google Patents
The suits
3 cases · W.D. Tex. (2) · E.D. Tex. (1)
| Filed | Defendant | Plaintiff | Court | Docket |
|---|---|---|---|---|
| 2026-08-13 | APPLE INC. | BOOMCLOUD 360, INC. | W.D. Tex. | 7:26-cv-00312 |
| 2026-08-13 | GOOGLE LLC | BOOMCLOUD 360, INC. | W.D. Tex. | 7:26-cv-00313 |
| 2026-08-13 | SAMSUNG ELECTRONICS CO., LTD. | BOOMCLOUD 360, INC. | E.D. Tex. | 2:26-cv-00693 |
Docket links open the public record on CourtListener. Filing dates are the complaint's.
Independent claims
What is actually asserted, verbatim.
1. A method for enhancing an audio signal having a left channel and a right channel, comprising, by a circuitry: applying a crosstalk processing to the audio signal; generating a mid component using a sum of the left channel and the right channel, the mid component being a nonspatial component of the audio signal; generating a mid compensation channel by applying filters to the mid component that compensate for spectral defects in the crosstalk processed audio signal caused by the crosstalk processing; and generating a left output channel and a right output channel using the mid compensation channel.
11. A system for enhancing an audio signal having a left channel and a right channel, comprising: a circuitry configured to: apply a crosstalk processing to the audio signal; generate a mid component using a sum of the left channel and the right channel, the mid component being a nonspatial component of the audio signal; generate a mid compensation channel by applying filters to the mid component that compensate for spectral defects in the crosstalk processed audio signal caused by the crosstalk processing; and generate a left output channel and a right output channel using the mid compensation channel.
21. A non-transitory computer readable medium comprising stored program code that when executed by a processor causes the processor to: apply a crosstalk processing to an audio signal including a left channel and a right channel; generate a mid component using a sum of the left channel and the right channel, the mid component being a nonspatial component of the audio signal; generate a mid compensation channel by applying filters to the mid component that compensate for spectral defects in the crosstalk processed audio signal caused by the crosstalk processing; and generate a left output channel and a right output channel using the mid compensation channel.
Art before the examiner
12 references of record, 1 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
- US20090086982A1 — Crosstalk cancellation for closely spaced speakers (Qualcomm Incorporated)
Applicant-cited and other (11)
- US20080031466A1 — Multi-channel echo compensation system
- US20080031462A1 — Spatial audio enhancement processing method and apparatus
- US20080273721A1 — Method for spatially processing multichannel signals, processing module, and virtual surround-sound systems
- WO2010094812A2 — Bone conduction hearing aid system
- CN102007780A — Apparatus and method for producing 3d audio in systems with closely spaced speakers
- CN103947226A — Audio signal processing device, audio signal processing method, program, and recording medium
- WO2017074321A1 — Apparatus and method for sound stage enhancement
- US20170208411A1 — Subband spatial and crosstalk cancellation for audio reproduction
- WO2017127271A1 — Subband spatial and crosstalk cancellation for audio reproduction
- US20170230777A1 — Audio enhancement for head-mounted speakers
- US20180124512A1 — Method, system and circuits for headset crosstalk reduction
Classification
- H04R3/14primary — Cross-over networks
- H04R2430/03 — Synergistic effects of band splitting and sub-band processing
- H04R3/04 — Circuits for transducers for correcting frequency response
- H04R5/02 — Spatial or constructional arrangements of loudspeakers
- H04R5/04 — Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
- H04S2400/01 — Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
- H04S2400/05 — Generation or adaptation of centre channel in multi-channel audio systems
- H04S2400/13 — Aspects of volume control, not necessarily automatic, in stereophonic sound systems
- H04S2420/07 — Synergistic effects of band splitting and sub-band processing
- H04S3/002 — Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
- H04S3/008 — Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels
- H04S7/30 — Control circuits for electronic adaptation of the sound field
- H04S7/303 — Tracking of listener position or orientation
Family
- US11051121B2 — B2 (2021)
- US20200120439A1 — A1 (2020)
- US10575116B2 — B2 (2020)
- US20190394600A1 — A1 (2019)
- 22 foreign family members: CN112313970A, KR102729576B1, TWI690220B, KR102548014B1, CN112313970B, KR20210107922A, JP7370415B2, CN114222226A, TWI787586B, KR20230101927A, TW202027517A, KR102296801B1, EP4496349A2, EP3811636A1, EP3811636A4, JP2022101630A, TW202002678A, EP4496349A3, JP2021522755A, KR20210012042A, JP7113920B2, WO2019245588A1
Abstract
An audio system provides for spatial enhancement, crosstalk processing, and crosstalk compensation of an input audio signal. The crosstalk compensation compensates for spectral defects caused by the application of the crosstalk processing to a spatially enhanced signal. The crosstalk compensation may be performed prior to the crosstalk processing, after the crosstalk processing, or in parallel with the crosstalk processing. The crosstalk compensation includes applying filters to the mid and side components of the left and right input channels to compensate for spectral defects from crosstalk processing of the audio signal. The crosstalk processing may include crosstalk simulation or crosstalk cancellation. In some embodiments, the crosstalk compensation may be integrated with a subband spatial processing that spatially enhances the audio signal.
Also asserted by BOOMCLOUD 360, INC.
- US 10,313,820 — Sub-band spatial audio enhancement (4 defendants)
- US 10,721,564 — Subband spatial and crosstalk cancellation for audio reporoduction (4 defendants)
- US 10,757,527 — Crosstalk cancellation b-chain (4 defendants)
- US 10,524,078 — Crosstalk cancellation b-chain (3 defendants)
- US 11,533,560 — Dynamic rendering device metadata-informed audio enhancement system (3 defendants)
Named in one of these suits? A prior-art search is commissioned once and serves every defendant who shares it. The examiner's own search record is free on the tools page, and your first preliminary search is free — one claim, back within 24 hours — so you know whether there is art the Office never saw before anyone pays for more. Flat fees: $2,500$899 for the independent claims, $5,000$1,500 for every asserted claim.
This page is assembled from public records — federal court dockets and the patent's own file — and is updated as the case list changes. It states what the record shows and is not an opinion on the validity or infringement of any claim. Patent data via Google Patents; docket data via CourtListener.