H04N 21/2383
Channel coding or modulation of digital bit-stream
Official title: Channel coding {or modulation} of digital bit-stream, e.g. QPSK modulation (arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002)
H04N21/2383 (Channel coding or modulation of digital bit-stream) appears on 1,798 US grants and 1,779 published applications in this corpus.
Search patents in H04N- Granted patents
- 1,798
- Published applications
- 1,779
- Assignees
- 428
- Inventors
- 2,061
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 12 | 0 |
| 1995 | 21 | 0 |
| 1996 | 31 | 0 |
| 1997 | 17 | 0 |
| 1998 | 29 | 0 |
| 1999 | 26 | 0 |
| 2000 | 21 | 0 |
| 2001 | 39 | 12 |
| 2002 | 31 | 63 |
| 2003 | 27 | 40 |
| 2004 | 29 | 57 |
| 2005 | 24 | 57 |
| 2006 | 44 | 69 |
| 2007 | 30 | 154 |
| 2008 | 48 | 137 |
| 2009 | 57 | 210 |
| 2010 | 89 | 133 |
| 2011 | 132 | 83 |
| 2012 | 149 | 76 |
| 2013 | 127 | 70 |
| 2014 | 140 | 92 |
| 2015 | 101 | 90 |
| 2016 | 82 | 88 |
| 2017 | 98 | 71 |
| 2018 | 79 | 56 |
| 2019 | 59 | 43 |
| 2020 | 54 | 51 |
| 2021 | 53 | 44 |
| 2022 | 31 | 25 |
| 2023 | 35 | 21 |
| 2024 | 21 | 14 |
| 2025 | 14 | 12 |
| 2026 | 9 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems, methods, and devices for video stream signal analysis15 Sep 2026US 12,739,454 B2Comcast Cable Communications, LLC
- Techniques for adaptive video multicasts through acoustic channels in underwater environments1 Sep 2026US 12,726,280 B2Rutgers, The State University of New Jersey
- Method of measuring network jitter18 Aug 2026US 12,712,796 B2ARRIS Enterprises LLC
- Broadcast signal frame generation device and broadcast signal frame generation method using bootstrap including symbol for signaling BICM mode of preamble and OFDM parameter together28 Jul 2026US RE50,973 E1Electronics and Telecommunications Research Institute
- Wireless transmission of samples encoded using spread spectrum video transport16 Jun 2026US 12,658,971 B2HYPHY USA Inc.
- Modulation-based docsis scheduler6 Aug 2026US 2026/0230347 A1Charter Communications Operating, LLC
- Iterative optimization techniques for generating encoding ladders for video streaming30 Jul 2026US 2026/0222637 A1Netflix, Inc.
- Broadcast receiving apparatus and transmission method of digital broadcast modulation wave23 Jul 2026US 2026/0213862 A1Maxell, Ltd.
- Systems and methods for content interference16 Jul 2026US 2026/0205638 A1Comcast Cable Communications, LLC
- Video transmission method and apparatus, and device and storage medium2 Jul 2026US 2026/0189739 A1
Most cited
By later US patents
- Audio/video transceiver apparatus including compression means497US 4,963,995 AExplore Technology, Inc. · 1990
- Audio/video transceiver apparatus including compression means, random access storage means, and microwave transceiver means481US 5,057,932 AExplore Technology, Inc. · 1991
- Apparatus and method for digital data transmission using orthogonal codes473US 6,356,555 B1Terayon Communications Systems, Inc. · 2002
- ATM packet demultiplexer for use in full service network having distributed architecture371US 5,544,161 ABell Atlantic Network Services, Inc. · 1996
- Integrating digital data with perceptible signals329US 6,389,055 B1Lucent Technologies Inc. · 2002