H04N 11/30
With transmission of the extra information by means of quadrature modulation
Official title: {with transmission of the extra information by means of quadrature modulation}
H04N11/30 (With transmission of the extra information by means of quadrature modulation) appears on 76 US grants and 1 published applications in this corpus.
Search patents in H04N- Granted patents
- 76
- Published applications
- 1
- Assignees
- 19
- Inventors
- 92
- Latest grant
- 19 May 2009
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 11 | 0 |
| 1990 | 11 | 0 |
| 1991 | 15 | 0 |
| 1992 | 12 | 0 |
| 1993 | 10 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Systems and methods for wireless transmission of uncompressed HDTV signals19 May 2009US 7,535,965 B2The Boeing Company
- Transmission of digital images within the NTSC analog format15 Jun 2004US 6,751,256 B1The Regents of the University of California
- Envelope detection of PN sequences accompanying VSB signal to control operation of QAM/VSB DTV receiver12 Nov 2002US 6,480,236 B1Samsung Electronics Co., Ltd.
- Equalizing method and equalizer using reference signal23 Mar 1999US 5,886,748 ASamsung Electronics Co., Ltd.
- Digital television (HDTV) and analog television (NTSC) broadcast systems combined for simultaneous broadcast30 Jun 1998US 5,774,193 A
Most cited
By later US patents
- Method and apparatus for transmission and reception of a digital television signal using multicarrier modulation217US 5,291,289 ANorth American Philips Corporation · 1994
- Multiresolution digital television broadcast system154US 5,267,021 AThe Trustees of Columbia University in the City of New York · 1993
- Apparatus for processing modified NTSC television signals, with digital signals buried therewithin132US 5,461,426 ASamsung Electronics Co., Ltd. · 1995
- Equalizing method and equalizer using reference signal99US 5,886,748 ASamsung Electronics Co., Ltd. · 1999
- System for compatible transmission of high-resolution TV94US 4,521,803 AGeneral Electric Company · 1985