H03M 7/3044
Conversion to or from differential modulation with several bits only, i.e. the
Official title: {Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM] (H03M7/3004 takes precedence; voice coding G10L19/00; image coding H04N19/00)}
H03M7/3044 (Conversion to or from differential modulation with several bits only, i.e. the) appears on 97 US grants and 46 published applications in this corpus.
Search patents in H03M- Granted patents
- 97
- Published applications
- 46
- Assignees
- 60
- Inventors
- 165
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
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| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
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| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 3 | 4 |
| 2005 | 2 | 2 |
| 2006 | 2 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 4 | 3 |
| 2017 | 2 | 4 |
| 2018 | 1 | 2 |
| 2019 | 2 | 3 |
| 2020 | 8 | 5 |
| 2021 | 4 | 6 |
| 2022 | 1 | 4 |
| 2023 | 6 | 0 |
| 2024 | 2 | 0 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Signal detection method, signal processing method and signal processing model7 Jul 2026US 12,676,633 B2Neuracle Technology (Shanghai) Co., Ltd.
- Sign data hiding of video recording15 Jul 2025US 12,363,276 B2Alibaba Group Holding Limited
- Methods and systems for combined lossless and lossy coding8 Jul 2025US 12,355,947 B1OP Solutions, LLC
- Data storage method, data obtaining method, and apparatus16 Apr 2024US 11,960,467 B2Huawei Technologies Co., Ltd.
- Methods and systems for combined lossless and lossy coding12 Mar 2024US 11,930,163 B2OP Solutions, LLC
- Signal detection method, signal processing method and signal processing model23 Apr 2026US 2026/0113056 A1Neuracle Technology (Shanghai) Co., Ltd.
- Sign data hiding of video recording30 Oct 2025US 2025/0337888 A1Alibaba Group Holding Limited
- Methods and systems for combined lossless and lossy coding23 Oct 2025US 2025/0330583 A1OP Solutions, LLC
- Methods and systems for combined lossless and lossy coding29 Sep 2022US 2022/0312002 A1OP Solutions, LLC
- Methods and Systems for Combined Lossless and Lossy Coding1 Sep 2022US 2022/0279166 A1OP Solutions, LLC
Most cited
By later US patents
- Perceptual noise shaping in the time domain via LPC prediction in the frequency domain76US 5,781,888 ALucent Technologies Inc. · 1998
- Lossless coding method for waveform data66US 6,664,913 B1Dolby Laboratories Licensing Corporation · 2003
- Adaptive quantization coder/decoder with limiter circuitry56US 5,072,295 AMitsubishi Denki Kabushiki Kaisha · 1991
- Wideband adaptive prediction42US 4,654,863 AAT&T Bell Laboratories · 1987
- ADPCM transcoder with integral tone generation and method therefor42US 5,384,807 AMotorola, Inc. · 1995