H04B 14/048
Non linear compression or expansion
Official title: {Non linear compression or expansion}
H04B14/048 (Non linear compression or expansion) appears on 63 US grants and 5 published applications in this corpus.
Search patents in H04B- Granted patents
- 63
- Published applications
- 5
- Assignees
- 40
- Inventors
- 86
- Latest grant
- 18 Nov 2008
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 1 |
| 2003 | 4 | 1 |
| 2004 | 4 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 2 | 0 |
| 2008 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and unit for substracting quantization noise from a PCM signal18 Nov 2008US 7,453,942 B2NXP B. V.
- Apparatus for converting PCM signal2 Oct 2007US 7,277,490 B1Samsung Electronics Co., Ltd.
- Frequency thinning device and method for compressing information by thinning out frequency components of signal27 Feb 2007US 7,184,961 B2Kabushiki Kaisha Kenwood
- Method and apparatus for reducing the word length of a digital input signal and method and apparatus for recovering a digital input signal8 Aug 2006US 7,088,779 B2Koninklijke Philips Electronics N. V.
- Computer-based conversion of digital signals10 Aug 2004US 6,775,297 B1
- Method and unit for substracting quantization noise from a pcm signal2 Jun 2005US 2005/0117656 A1Koninklijke Philips Electronics N. V.
- Method of optimizing compression rate in adaptive differential pulse code modulation (ADPCM)3 Feb 2005US 2005/0025251 A1
- Frequency thinning device and method for compressing information by thinning out frequency components of signal4 Sep 2003US 2003/0167164 A1Kabushiki Kaisha Kenwood
- Method and apparatus for reducing the word length of a digital input signal and method and apparatus for recovering a digital input signal28 Feb 2002US 2002/0025004 A1Koninklijke Philips Electronics N. V.
- Channel check test system27 Dec 2001US 2001/0056556 A1Mitsubishi Denki Kabushiki Kaisha
Most cited
By later US patents
- Mapper for high data rate signalling90US 5,862,179 AGeneral DataComm, Inc. · 1999
- Signaling method having mixed-base shell map indices79US 6,084,915 A3Com Corporation · 2000
- Mapper for high data rate signalling69US 5,822,371 AGeneral DataComm, Inc. · 1998
- Speech sampling and companding device55US 4,550,425 ASperry Corporation · 1985
- Mapper for high data rate signalling53US 6,115,415 AGeneral Data CommInc. · 2000