US 10,524,078 Crosstalk cancellation b-chain
3 defendants · 3 suits · updated October 6, 2026
Also cited as U.S. Patent No. 10,524,078 · US10524078B2 · US 10,524,078 B2 · 10524078 · the '078 patent
BOOMCLOUD 360, INC. has filed 3 patent-infringement suits on US 10,524,078, "Crosstalk cancellation b-chain" 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 December 31, 2019 on a priority date of November 29, 2017. Its abstract opens: "Embodiments relate to b-chain processing for a spatially enhanced audio signal." The examiner cited 9 references during prosecution.
- Assignee
- Boomcloud 360 Inc
- Priority date
- November 29, 2017
- Granted
- December 31, 2019
- Expires
- November 29, 2037
- Status
- Active
- Claims
- 23 (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 system for enhancing an input audio signal for a left speaker and a right speaker, comprising: a spatial enhancement processor configured to generate a spatially enhanced signal by gain adjusting spatial components and nonspatial components of the input audio signal; and a b-chain processor, configured to: determine asymmetries between the left speaker and the right speaker in frequency response, time alignment, and signal level for a listening position; and generate a left output channel for the left speaker and a right output channel for the right speaker by: applying an N-band equalization to the spatially enhanced signal to adjust for the asymmetry in the frequency response; applying a delay to the spatially enhanced signal to adjust for the asymmetry in the time alignment; and applying a gain to the spatially enhanced signal to adjust for the asymmetry in the signal level.
10. A non-transitory computer readable medium storing instructions that, when executed by a processor, configure the processor to: generate a spatially enhanced signal by gain adjusting spatial components and nonspatial components of an input audio signal including a left input channel for a left speaker and a right input channel for a right speaker; determine asymmetries between the left speaker and the right speaker in frequency response, time alignment, and signal level for a listening position; and generate a left output channel for the left speaker and a right output channel for the right speaker by: applying an N-band equalization to the spatially enhanced signal to adjust for the asymmetry in the frequency response; applying a delay to the spatially enhanced signal to adjust for the asymmetry in the time alignment; and applying a gain to the spatially enhanced signal to adjust for the asymmetry in the signal level.
19. A method for enhancing an input audio signal for a left speaker and a right speaker, comprising: generating a spatially enhanced signal by gain adjusting spatial components and nonspatial components of the input audio signal including a left input channel for the left speaker and a right input channel for the right speaker; determining asymmetries between the left speaker and the right speaker in frequency response, time alignment, and signal level for a listening position; and generating a left output channel for the left speaker and a right output channel for the right speaker by: applying an N-band equalization to the spatially enhanced signal to adjust for the asymmetry in the frequency response; applying a delay to the spatially enhanced signal to adjust for the asymmetry in the time alignment; and applying a gain to the spatially enhanced signal to adjust for the asymmetry in the signal level.
Art before the examiner
15 references of record, 9 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
- US3920904A — Method and apparatus for imparting to headphones the sound-reproducing characteristics of loudspeakers (Beyer Eugen)
- US20080031462A1 — Spatial audio enhancement processing method and apparatus (Creative Technology Ltd)
- US20080249769A1 — Method and Apparatus for Determining Audio Spatial Quality (Baumgarte Frank M)
- US20080273721A1 — Method for spatially processing multichannel signals, processing module, and virtual surround-sound systems (Creative Technology Ltd)
- US20110268281A1 — Audio spatialization using reflective room model (Microsoft Corporation)
- US9419575B2 — Audio settings based on environment (Sonos, Inc.)
- US10009704B1 — Symmetric spherical harmonic HRTF rendering (Google Llc)
- US10255657B2 — Image perspective conversion method by converting coordinates of polygonal sub-regions and system thereof (Weltrend Semiconductor Inc.)
- US10313820B2 — Sub-band spatial audio enhancement (Boomcloud 360, Inc.)
Applicant-cited and other (6)
- US20140140515A1 — Apparatus and method for generating multimedia data, and apparatus and method for playing multimedia data
- WO2015054033A2 — Spatial audio processing system and method
- US20160044431A1 — Immersive audio rendering system
- US20170171672A1 — Method and apparatus for localization of streaming sources in hearing assistance system
- US20170230777A1 — Audio enhancement for head-mounted speakers
- US20170251322A1 — Method for rendering multi-channel audio signals for l1 channels to a different number l2 of loudspeaker channels and apparatus for rendering multi-channel audio signals for l1 channels to a different number l2 of loudspeaker channels
Classification
- H04S7/302primary — Electronic adaptation of stereophonic sound system to listener position or orientation
- H04S7/303primary — Tracking of listener position or orientation
- H04R3/04 — Circuits for transducers for correcting frequency response
- H04R3/14 — Cross-over networks
- 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
- H04S1/002 — Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
- H04S1/007 — Two-channel systems in which the audio signals are in digital form
- H04S2400/13 — Aspects of volume control, not necessarily automatic, in stereophonic sound systems
- H04S2420/01 — Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
- H04S2420/13 — Application of wave-field synthesis in stereophonic audio systems
- 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
Family
- US10524078B2 — B2 (2019)
- US10757527B2 — B2 (2020)
- US20200037095A1 — A1 (2020)
- US20190166447A1 — A1 (2019)
- 20 foreign family members: JP2023153394A, JP7811628B2, CN111418220B, TWI692257B, KR102185071B1, KR20200080344A, JP2025027075A, EP3718317A1, JP2021132408A, JP7410082B2, EP3718317A4, TW201927010A, JP2021505064A, JP2026067957A, JP7597876B2, KR20200137020A, KR102475646B1, CN111418220A, WO2019108487A1, JP6891350B2
Abstract
Embodiments relate to b-chain processing for a spatially enhanced audio signal. A system includes a b-chain processor. The b-chain processor determines asymmetries between the left speaker and the right speaker in frequency response, time alignment, and signal level for a listening position; and generates a left output channel for the left speaker and a right output channel for the right speaker by: applying an N-band equalization to the spatially enhanced signal to adjust for the asymmetry in the frequency response; applying a delay to the spatially enhanced signal to adjust for the asymmetry in the time alignment; and applying a gain to the spatially enhanced signal to adjust for the asymmetry in the signal level.
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 11,051,121 — Spectral defect compensation for crosstalk processing of spatial audio signals (3 defendants)
- US 11,533,560 — Dynamic rendering device metadata-informed audio enhancement system (3 defendants)
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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.