H04S 3/02
Systems employing more than two channels: of the matrix type, i.e. in
Official title: of the matrix type, i.e. in which input signals are combined algebraically, e.g. after having been phase shifted with respect to each other
H04S3/02 (Systems employing more than two channels: of the matrix type, i.e. in) appears on 672 US grants and 635 published applications in this corpus.
Search patents in H04S- Granted patents
- 672
- Published applications
- 635
- Assignees
- 180
- Inventors
- 667
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 7 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 5 |
| 2003 | 3 | 10 |
| 2004 | 9 | 11 |
| 2005 | 2 | 13 |
| 2006 | 7 | 10 |
| 2007 | 8 | 16 |
| 2008 | 13 | 13 |
| 2009 | 4 | 24 |
| 2010 | 9 | 16 |
| 2011 | 8 | 17 |
| 2012 | 25 | 16 |
| 2013 | 22 | 10 |
| 2014 | 16 | 15 |
| 2015 | 15 | 23 |
| 2016 | 27 | 58 |
| 2017 | 58 | 63 |
| 2018 | 50 | 36 |
| 2019 | 75 | 65 |
| 2020 | 44 | 58 |
| 2021 | 36 | 32 |
| 2022 | 42 | 37 |
| 2023 | 23 | 16 |
| 2024 | 32 | 25 |
| 2025 | 30 | 28 |
| 2026 | 11 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus, methods and computer programs for enabling rendering of spatial audio1 Sep 2026US 12,726,779 B2Nokia Technologies Oy
- Apparatus and method for generating a first control signal and a second control signal by using a linearization and/or a bandwidth extension25 Aug 2026US 12,720,254 B2Kaetel Systems GmbH
- Audio signal processing method25 Aug 2026US 12,720,273 B2Areal BV
- Multi-channel audio decoder, multi-channel audio encoder, methods and computer program using a residual-signal-based adjustment of a contribution of a decorrelated signal16 Jun 2026US 12,658,193 B2Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.
- Higher order ambisonics encoding and decoding26 May 2026US 12,640,157 B2Apple Inc.
- A method, device, system, and software for a computer-implemented method for playback of game audio by use of representative audio objects at runtime8 Oct 2026US 2026/0306950 A1Dolby Laboratories Licensing Corporation
- Method and device for decoding an audio soundfield representation8 Oct 2026US 2026/0311709 A1Dolby Laboratories Licensing Corporation
- Multi-channel audio decoder, multi-channel audio encoder, methods and computer program using a residual-signal-based adjustment of a contribution of a decorrelated signal1 Oct 2026US 2026/0301751 A1Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V.
- Audio system and method27 Aug 2026US 2026/0255125 A1Harman Becker Automotive Systems GmbH
- Method and apparatus for decoding stereo loudspeaker signals from a higher-order ambisonics audio signal16 Jul 2026US 2026/0205751 A1Dolby International AB
Most cited
By later US patents
- Surround sound apparatus238US 5,757,927 ATrifield Productions Limited · 1998
- Apparatus and method for constructing a multi-channel output signal or for generating a downmix signal205US 7,394,903 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. · 2008
- Audio matrix encoding149US 5,862,228 ADolby Laboratories Licensing Corporation · 1999
- Compatible multi-channel coding/decoding by weighting the downmix channel149US 7,447,317 B2Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e. V. · 2008
- Process and device for mixing sound signals143US 6,363,155 B1Studer Professional Audio AG · 2002