G11B 20/1806
Pulse code modulation systems for audio signals
Official title: {Pulse code modulation systems for audio signals (G11B20/1803 takes precedence)}
G11B20/1806 (Pulse code modulation systems for audio signals) appears on 740 US grants and 163 published applications in this corpus.
Search patents in G11B- Granted patents
- 740
- Published applications
- 163
- Assignees
- 121
- Inventors
- 892
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 11 | 0 |
| 1982 | 15 | 0 |
| 1983 | 23 | 0 |
| 1984 | 26 | 0 |
| 1985 | 32 | 0 |
| 1986 | 27 | 0 |
| 1987 | 47 | 0 |
| 1988 | 24 | 0 |
| 1989 | 42 | 0 |
| 1990 | 21 | 0 |
| 1991 | 16 | 0 |
| 1992 | 18 | 0 |
| 1993 | 21 | 0 |
| 1994 | 28 | 0 |
| 1995 | 27 | 0 |
| 1996 | 28 | 0 |
| 1997 | 28 | 0 |
| 1998 | 36 | 0 |
| 1999 | 32 | 0 |
| 2000 | 37 | 0 |
| 2001 | 26 | 11 |
| 2002 | 19 | 19 |
| 2003 | 14 | 11 |
| 2004 | 16 | 13 |
| 2005 | 9 | 12 |
| 2006 | 18 | 25 |
| 2007 | 7 | 34 |
| 2008 | 26 | 10 |
| 2009 | 7 | 7 |
| 2010 | 13 | 4 |
| 2011 | 7 | 0 |
| 2012 | 5 | 0 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 1 |
| 2016 | 0 | 2 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 3 | 4 |
| 2020 | 3 | 3 |
| 2021 | 1 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 4 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Data storage device configuration using mutual information29 Jul 2025US 12,374,365 B2Western Digital Technologies, Inc.
- Modulation code and ECC rate optimization using symbol context mutual information27 May 2025US 12,315,534 B2Western Digital Technologies, Inc.
- Header decoding mechanism for tape storage23 Apr 2024US 11,967,342 B2International Business Machines Corporation
- Bit interleaver for low-density parity check codeword having length of 64800 and code rate of 3/15 and 4096-symbol mapping, and bit interleaving method using same24 May 2022US 11,342,941 B2Electronics and Telecommunications Research Institute
- Bit interleaver for low-density parity check codeword having length of 64800 and code rate of 2/15 and 1024-symbol mapping, and bit interleaving method using same22 Mar 2022US 11,283,471 B2Electronics and Telecommunications Research Institute
- Data Storage Device Configuration Using Mutual Information8 Aug 2024US 2024/0265943 A1Western Digital Technologies, Inc.
- Modulation Code and ECC Rate Optimization Using Symbol Context Mutual Information8 Aug 2024US 2024/0265948 A1Western Digital Technologies, Inc.
- Header decoding mechanism for tape storage14 Mar 2024US 2024/0087604 A1International Business Machines Corporation
- Header encoding mechanism for tape storage14 Mar 2024US 2024/0087605 A1International Business Machines Corporation
- Codeword Interleaving for Magnetic Storage Media27 Aug 2020US 2020/0272339 A1Marvell Asia Pte Ltd
Most cited
By later US patents
- Embedded signalling739US 5,319,735 ABolt Beranek and Newman Inc. · 1994
- Thermal asperity compensation using multiple sync marks for retroactive and split segment data synchronization in a magnetic disk storage system155US 5,844,920 ACirrus Logic, Inc. · 1998
- PCM Signal transmitting system with error detecting and correcting capability144US 4,306,305 ASony Corporation · 1981
- Method and apparatus for recording and/or reproducing digital data144US 4,882,732 ASony Corporation · 1989
- Digital audio scrambling system with error conditioning136US 4,608,456 AM/A-COM Linkabit, Inc. · 1986