H04N 21/439
Processing of audio elementary streams
H04N21/439 (Processing of audio elementary streams) appears on 4,262 US grants and 5,335 published applications in this corpus.
Search patents in H04N- Granted patents
- 4,262
- Published applications
- 5,335
- Assignees
- 1,057
- Inventors
- 7,778
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 13 | 0 |
| 1998 | 10 | 0 |
| 1999 | 18 | 0 |
| 2000 | 15 | 0 |
| 2001 | 27 | 14 |
| 2002 | 29 | 72 |
| 2003 | 22 | 70 |
| 2004 | 35 | 78 |
| 2005 | 28 | 83 |
| 2006 | 46 | 160 |
| 2007 | 33 | 138 |
| 2008 | 40 | 107 |
| 2009 | 54 | 134 |
| 2010 | 69 | 133 |
| 2011 | 96 | 143 |
| 2012 | 114 | 131 |
| 2013 | 132 | 210 |
| 2014 | 205 | 332 |
| 2015 | 208 | 280 |
| 2016 | 246 | 293 |
| 2017 | 297 | 336 |
| 2018 | 283 | 276 |
| 2019 | 286 | 261 |
| 2020 | 280 | 333 |
| 2021 | 289 | 343 |
| 2022 | 305 | 349 |
| 2023 | 318 | 321 |
| 2024 | 327 | 332 |
| 2025 | 278 | 226 |
| 2026 | 143 | 180 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Use of doppler shift as a basis to determine area of focus6 Oct 2026US 12,756,895 B2The Nielsen Company (US), LLC
- Methods and apparatus to detect a presence status6 Oct 2026US 12,756,897 B2The Nielsen Company (US), LLC
- Detection of the change of position of a set-top box by image analysis29 Sep 2026US 12,750,627 B2Sagemcom Broadband SAS
- Video determination method and apparatus, electronic device and storage medium22 Sep 2026US 12,744,958 B2Lemon Inc.
- Systems and methods for classification and delivery of content22 Sep 2026US 12,744,962 B2Comcast Cable Communications, LLC
- Leveraging Audio Matches to Improve Visual Matching Recall Between Video Content Items8 Oct 2026US 2026/0313192 A1Google Inc.
- Methods and apparatus to identify an episode number based on fingerprint and matched viewing information8 Oct 2026US 2026/0313195 A1The Nielsen Company (US), LLC
- Systems and methods for providing a contextual menu with information related to an emergency alert8 Oct 2026US 2026/0313205 A1Adeia Guides Inc.
- Methods, apparatus, and machine-readable storage media to monitor a media presentation1 Oct 2026US 2026/0303906 A1The Nielsen Company (US), LLC
- Information processing method and apparatus, device, and storage medium1 Oct 2026US 2026/0303923 A1Beijing Zitiao Network Technology Co., Ltd.
Most cited
By later US patents
- Audience measurement system utilizing ancillary codes and passive signatures1,063US 5,481,294 AA. C. Nielsen Company · 1996
- Synchronization of audio and video signals in a live multicast in a LAN562US 6,122,668 AStarlight Networks · 2000
- Object customization and presentation system555US 7,859,551 B22010
- Intelligent automated assistant for TV user interactions537US 9,338,493 B2Apple Inc. · 2016
- Home entertainment system combining complex processor capability with a high quality display451US 5,675,390 AGateway 2000, Inc. · 1997