H03M 3/042
With adaptable step size
Official title: {with adaptable step size, e.g. adaptive differential pulse code modulation [ADPCM]}
H03M3/042 (With adaptable step size) appears on 73 US grants and 15 published applications in this corpus.
Search patents in H03M- Granted patents
- 73
- Published applications
- 15
- Assignees
- 46
- Inventors
- 134
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 3 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 3 | 2 |
| 2021 | 2 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Voltage monitoring of switching drivers16 Dec 2025US 12,500,601 B2Cirrus Logic, Inc.
- Method of modifying an analog wave or digital pulse to convey additional data with each wave or pulse13 Feb 2024US 11,901,918 B2
- Tracking analog-to-digital converter for power converters13 Sep 2022US 11,444,632 B2Infineon Technologies Austria AG
- Method of error concealment, and associated device14 Sep 2021US 11,121,721 B2STMicroelectronics S,r.l.
- Sample rate conversion circuit with noise shaping modulation29 Jun 2021US 11,050,435 B1Synaptics Incorporated
- Voltage monitoring of switching drivers27 Feb 2025US 2025/0070795 A1Cirrus Logic International Semiconductor Ltd.
- Method of modifying an analog wave or digital pulse to convey additional data with each wave or pulse25 May 2023US 2023/0163780 A1
- Tracking analog-to-digital converter for power converters28 Apr 2022US 2022/0131552 A1Infineon Technologies Austria AG
- Method of error concealment, and associated device12 Nov 2020US 2020/0358453 A1STMicroelectronics S,r.l.
- Method of error concealment, and associated device7 May 2020US 2020/0145019 A1STMicroelectronics S,r.l.
Most cited
By later US patents
- Adaptive prediction differential PCM-type transmission apparatus and process with shaping of the quantization noise124US 4,385,393 AL'Etat Francais represente par le Secretaire d'Etat · 1983
- DPCM system with rate-of-fill control of buffer occupancy85US 4,706,260 ARCA Corporation · 1987
- ADPCM coder-decoder including partial band energy transition detection65US 4,677,423 AAmerican Telephone and Telegraph Company, AT&T Bell Laboratories · 1987
- Compression and expansion technique for digital audio data60US 5,083,310 AApple Computer, Inc. · 1992
- Predictive speech signal coding with reduced noise effects58US 4,133,976 ABell Telephone Laboratories, Incorporated · 1979