H04N 5/923
Using preemphasis of the signal before modulation and deemphasis of the signal
Official title: using preemphasis of the signal before modulation and deemphasis of the signal after demodulation {(volume compression or expansion in amplifiers in general H03G7/00)}
H04N5/923 (Using preemphasis of the signal before modulation and deemphasis of the signal) appears on 95 US grants and 3 published applications in this corpus.
Search patents in H04N- Granted patents
- 95
- Published applications
- 3
- Assignees
- 23
- Inventors
- 134
- Latest grant
- 6 Feb 2007
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 9 | 0 |
| 1993 | 8 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for designing de-emphasis circuit for video signal processing integrated circuit and integrated circuit made by the same6 Feb 2007US 7,174,082 B2Samsung Electronics Co., Ltd.
- Video cassette recorder4 Jan 2005US 6,839,501 B2Matsushita Electric Industrial Co., Ltd.
- Apparatus for recording a high quality signal11 Feb 2003US 6,519,409 B1Victor Company of Japan, Ltd.
- Video recorder having playback-signal processing means adaptable to different playback qualities of video recordings17 Dec 2002US 6,496,645 B1Koninklijke Philips Electronics N. V.
- Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal12 Jun 2001US 6,246,827 B1Samsung Electronics Co., Ltd.
- Content providing method and apparatus, and content playback method18 Jul 2024US 2024/0244299 A1Industry-Academia Cooperation Group of Sejong U
- Method for designing de-emphasis circuit for video signal processing integrated circuit and integrated circuit made by the same14 Mar 2002US 2002/0031326 A1Samsung Electronics Co., Ltd.
- Video cassette recorder27 Sep 2001US 2001/0024563 A1Matsushita Electric Industrial Co., Ltd.
Most cited
By later US patents
- Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal112US 6,246,827 B1Samsung Electronics Co., Ltd. · 2001
- Apparatus and method for producing a panorama image using a motion vector of an image in an image signal39US 5,510,830 ASony Corporation · 1996
- Complementary pre-emphasis and de-emphasis circuits for a video signal transfer channel34US 4,200,889 ABASF SE · 1980
- Method of video noise reduction using non-linear pre/de-emphasis31US 5,535,246 ANational Transcommunications Limited · 1996
- Panorama image producing method and appartus28US 5,548,409 ASony Corporation · 1996