H04S 2400/01
Multi-channel, i.e. more than two input channels, sound reproduction with two speakers
Official title: Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
H04S2400/01 (Multi-channel, i.e. more than two input channels, sound reproduction with two speakers) appears on 1,949 US grants and 2,275 published applications in this corpus.
Search patents in H04S- Granted patents
- 1,949
- Published applications
- 2,275
- Assignees
- 458
- Inventors
- 2,457
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 2 |
| 2002 | 1 | 5 |
| 2003 | 2 | 7 |
| 2004 | 4 | 3 |
| 2005 | 8 | 13 |
| 2006 | 2 | 17 |
| 2007 | 8 | 25 |
| 2008 | 7 | 24 |
| 2009 | 7 | 23 |
| 2010 | 8 | 16 |
| 2011 | 18 | 20 |
| 2012 | 25 | 16 |
| 2013 | 22 | 21 |
| 2014 | 21 | 47 |
| 2015 | 29 | 63 |
| 2016 | 59 | 104 |
| 2017 | 106 | 144 |
| 2018 | 144 | 192 |
| 2019 | 225 | 225 |
| 2020 | 227 | 235 |
| 2021 | 185 | 182 |
| 2022 | 164 | 202 |
| 2023 | 166 | 219 |
| 2024 | 186 | 189 |
| 2025 | 189 | 166 |
| 2026 | 94 | 115 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device and method for expanding 7-channel audio by using radio transmission6 Oct 2026US 12,756,977 B2Samsung Electronics Co., Ltd.
- Colorless generation of elevation perceptual cues using all-pass filter networks6 Oct 2026US 12,756,986 B2Boomcloud 360, Inc.
- Playback device pairing22 Sep 2026US 12,745,041 B2Sonos, Inc.
- Efficient rendering of virtual soundfields22 Sep 2026US 12,745,053 B2Magic Leap, Inc.
- Audio processing device and method therefor15 Sep 2026US 12,739,587 B2Sony Group Corporation
- 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
- Performing common audio convolutions using iso-trajectories in three dimensional (3d) space8 Oct 2026US 2026/0313308 A1Google Inc.
- Audio Scene Description and Control8 Oct 2026US 2026/0313310 A1Apple Inc.
- Spatial Audio Representation and Rendering8 Oct 2026US 2026/0313312 A1Nokia Technologies Oy
- Immersive audio in a media playback system1 Oct 2026US 2026/0303676 A1Sonos, Inc.
Most cited
By later US patents
- Apparatus and method for encoding a multi-channel audio signal314US 8,577,045 B2Motorola Mobility LLC · 2013
- Sound reproducing apparatus and sound reproducing method303US 8,160,281 B2Samsung Electronics Co., Ltd. · 2012
- Use of voice-to-remaining audio (VRA) in consumer applications202US 6,311,155 B1Hearing Enhancement Company, LLC · 2001
- Adaptive room equalization using a speaker and a handheld listening device150US 9,538,308 B2Apple Inc. · 2017
- Method and device for processing a multichannel signal for use with a headphone148US 5,742,689 AVirtual Listening Systems, Inc. · 1998