Patents in suit

US 10,757,527 Crosstalk cancellation b-chain

4 defendants · 6 suits · updated October 6, 2026

Also cited as U.S. Patent No. 10,757,527 · US10757527B2 · US 10,757,527 B2 · 10757527 · the '527 patent

BOOMCLOUD 360, INC. has filed 6 patent-infringement suits on US 10,757,527, "Crosstalk cancellation b-chain" since June 17, 2026, 3 of them in the E.D. Tex., against 4 distinct defendants including BEST BUY CO., INC., TARGET CORPORATION, INC and Walmart Inc. The patent was granted August 25, 2020 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
August 25, 2020
Expires
November 29, 2037
Status
Active
Claims
30 (3 independent)
Inventors
Zachary Seldess
Full text
Google Patents

The suits

6 cases · E.D. Tex. (3) · N.D. Cal. (2) · S.D. Cal. (1)

Filed Defendant Plaintiff Court Docket
2026-06-17 BEST BUY CO., INC. BOOMCLOUD 360, INC. E.D. Tex. 2:26-cv-00488
2026-06-17 TARGET CORPORATION, INC BOOMCLOUD 360, INC. E.D. Tex. 2:26-cv-00489
2026-06-17 Walmart Inc Boomcloud 360 Inc E.D. Tex. 1:26-cv-00245
2026-08-05 Boomcloud 360, Inc. Apple Inc. S.D. Cal. 3:26-cv-04492
2026-08-18 Boomcloud 360, Inc.DJ Google LLC N.D. Cal. 3:26-cv-08573
2026-09-15 Boomcloud 360, Inc.DJ Motorola Mobility LLC N.D. Cal. 3:26-cv-10497

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 system for enhancing an input audio signal for a left speaker and a right speaker, comprising: a processing circuitry 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 at least one of: applying an N-band equalization to the input audio signal to adjust for the asymmetry in the frequency response; applying a delay to the input audio signal to adjust for the asymmetry in the time alignment; or applying a gain to the input audio signal to adjust for the asymmetry in the signal level.

Claim 11

11. A non-transitory computer readable medium storing instructions that, when executed by at least one processor, configure the at least one processor to: determine asymmetries between a left speaker and a 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 at least one of: applying an N-band equalization to the input audio signal to adjust for the asymmetry in the frequency response; applying a delay to the input audio signal to adjust for the asymmetry in the time alignment; or applying a gain to the input audio signal to adjust for the asymmetry in the signal level.

Claim 21

21. A method for enhancing an input audio signal for a left speaker and a right speaker, comprising, by a processing circuitry: determine 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 at least one of: applying an N-band equalization to the input audio signal to adjust for the asymmetry in the frequency response; applying a delay to the input audio signal to adjust for the asymmetry in the time alignment; or applying a gain to the input audio signal to adjust for the asymmetry in the signal level.

Art before the examiner

22 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

  • US4975954A — Head diffraction compensated stereo system with optimal equalization (Cooper Duane H)
  • US5119420A — Device for correcting a sound field in a narrow space (Pioneer Electronic Corporation)
  • US5400405A — Audio image enhancement system (Harman Electronics, Inc.)
  • US20050265558A1 — Method and circuit for enhancement of stereo audio reproduction (Waves Audio Ltd.)
  • US20080031462A1 — Spatial audio enhancement processing method and apparatus (Creative Technology Ltd)
  • US8050433B2 — Apparatus and method to cancel crosstalk and stereo sound generation system using the same (Samsung Electronics Co., Ltd.)
  • 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 (Dolby Laboratories Licensing Corporation)
  • US10499153B1 — Enhanced virtual stereo reproduction for unmatched transaural loudspeaker systems (Boomcloud 360, Inc.)
  • US10524078B2 — Crosstalk cancellation b-chain (Boomcloud 360, Inc.)
Applicant-cited and other (13)
  • US3920904A — Method and apparatus for imparting to headphones the sound-reproducing characteristics of loudspeakers
  • US20080249769A1 — Method and Apparatus for Determining Audio Spatial Quality
  • US20080273721A1 — Method for spatially processing multichannel signals, processing module, and virtual surround-sound systems
  • US20110268281A1 — Audio spatialization using reflective room model
  • 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
  • US9419575B2 — Audio settings based on environment
  • US20170171672A1 — Method and apparatus for localization of streaming sources in hearing assistance system
  • US20170230777A1 — Audio enhancement for head-mounted speakers
  • US10009704B1 — Symmetric spherical harmonic HRTF rendering
  • US10255657B2 — Image perspective conversion method by converting coordinates of polygonal sub-regions and system thereof
  • US10313820B2 — Sub-band spatial audio enhancement

Classification

  • H04R5/04primary — 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
  • H04S7/302primary — Electronic adaptation of stereophonic sound system to 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
  • 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
  • H04S7/303 — Tracking of listener position or orientation

Family

  • US10757527B2 — B2 (2020)
  • US10524078B2 — B2 (2019)
  • 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 10,524,078 — Crosstalk cancellation b-chain (3 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.