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Class Information
Number: 348/611
Name: Television > Image signal processing circuitry specific to television > Noise or undesired signal reduction > Processing at encoder or transmitter (e.g., pre-correction) > To suppress echo
Description: Subject matter including apparatus for materially reducing or eliminating the effects of reflected or time delayed versions of the same signal on the displayed image.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7567724 |
Image processing apparatus, image processing method, program of image processing method, and recording medium in which program of image processing method has been recorded |
Jul. 28, 2009 |
| 7304687 |
Ghost cancellation system using wavelet processed ghost cancellation reference signal |
Dec. 4, 2007 |
| 6952238 |
Method and apparatus for echo cancellation in digital ATV systems using an echo cancellation reference signal |
Oct. 4, 2005 |
| 6816204 |
Ghost cancellation reference signals for broadcast digital television signal receivers and receivers for utilizing them |
Nov. 9, 2004 |
| 6806915 |
Method and apparatus for echo cancellation in digital communications using an echo cancellation reference signal |
Oct. 19, 2004 |
| 6768517 |
Repetitive-PN1023-sequence echo-cancellation reference signal for single-carrier digital television broadcast systems |
Jul. 27, 2004 |
| 6717621 |
Method and apparatus for reducing flicker in a video image sequence |
Apr. 6, 2004 |
| 6710819 |
Method and system for improved display filtering |
Mar. 23, 2004 |
| 6710811 |
Data processing device |
Mar. 23, 2004 |
| 6559894 |
Block-adaptive equalization using partial decision feedback in digital broadcast communications |
May. 6, 2003 |
| 6400393 |
DTV receiver with filter in I-F circuitry to suppress FM sound carrier of NTSC Co-channel interfering signal |
Jun. 4, 2002 |
| 6377312 |
Adaptive fractionally spaced equalizer for received radio transmissions with digital content, such as DTV signals |
Apr. 23, 2002 |
| 6268888 |
Mechanism for adaptive selection of anti-ghosting filtering |
Jul. 31, 2001 |
| 6262766 |
Method for assessing the quality of a television image |
Jul. 17, 2001 |
| 6246431 |
Digital television system for reducing co-channel interference in 8 MHZ channels |
Jun. 12, 2001 |
| 6222592 |
TV receiver equalizer storing channel characterizations for each TV channel between times of reception therefrom |
Apr. 24, 2001 |
| 6133963 |
System for echo cancellation comprising an improved ghost cancellation reference signal |
Oct. 17, 2000 |
| 5886749 |
Demodulation using a time domain guard interval with an overlapped transform |
Mar. 23, 1999 |
| 5761088 |
Method and apparatus for channel identification using incomplete or noisy information |
Jun. 2, 1998 |
| 5745187 |
Method and apparatus for combating co-channel NTSC interference for digital TV transmission using a bank of rejection filters |
Apr. 28, 1998 |
| 5619278 |
Method and apparatus for processing a ghost cancellation reference signal |
Apr. 8, 1997 |
| 5568202 |
System for echo cancellation comprising an improved ghost cancellation reference signal |
Oct. 22, 1996 |
| 5530485 |
Channel equalizer for a high definition television |
Jun. 25, 1996 |
| 5475444 |
Channel equalizer for a HDTV using a composite filter |
Dec. 12, 1995 |
| 5438369 |
Digital data interleaving system with improved error correctability for vertically correlated interference |
Aug. 1, 1995 |
| 5396299 |
System and circuit architecture for echo cancellation and a television receiver comprising same |
Mar. 7, 1995 |
| 5361102 |
System to cancel ghosts in NTSC television transmission |
Nov. 1, 1994 |
| 5353069 |
Transmitted television signal waveform equalizing system |
Oct. 4, 1994 |
| 5260972 |
Technique for determining signal dispersion characteristics in communications systems |
Nov. 9, 1993 |
| 5187577 |
Circuit for eliminating ghost noise in image processing system |
Feb. 16, 1993 |
| 5179444 |
System for echo cancellation comprising an improved ghost cancellation reference signal |
Jan. 12, 1993 |
| 5177611 |
Method and apparatus for canceling quadrature distortion as for video signals having in-phase and quadrature phase components |
Jan. 5, 1993 |
| 5121211 |
System for echo cancellation comprising an improved ghost cancellation reference signal |
Jun. 9, 1992 |
| 5119196 |
Ghost cancellation of analog TV signals |
Jun. 2, 1992 |
| 5117291 |
Technique for adjusting signal dispersion cancellation apparatus in communications systems |
May. 26, 1992 |
| 5111298 |
Method and apparatus for communication channel identification and signal restoration |
May. 5, 1992 |
| 5065241 |
Ghost cancelling system that cancels ghosts from video signals with a transversal filter |
Nov. 12, 1991 |
| 5065242 |
Deghosting apparatus using pseudorandom sequences |
Nov. 12, 1991 |
| 5060067 |
System for negating the effects of DC offsets in an adaptive equalizer |
Oct. 22, 1991 |
| 4980767 |
Technique for determining signal dispersion characteristics in communications systems |
Dec. 25, 1990 |
| 4941049 |
Television system using reversing scan which minimizes ghost visibility |
Jul. 10, 1990 |
| 4887306 |
Adaptive temporal filter for ultrasound imaging system |
Dec. 12, 1989 |
| 4703357 |
Adaptive television deghosting system |
Oct. 27, 1987 |
| 4449145 |
Intelligent teletext decoder |
May. 15, 1984 |
| 4424533 |
Phase distortion detection circuitry for low cost automatic equalizer |
Jan. 3, 1984 |
| 4393397 |
Television ghost signal detector with color burst phase delay control |
Jul. 12, 1983 |
| 4333109 |
Intelligent teletext decoder |
Jun. 1, 1982 |
| 4297660 |
Electric circuit using surface acoustic wave device |
Oct. 27, 1981 |
| 4232400 |
Echo control system |
Nov. 4, 1980 |
| 4152657 |
Echo suppression circuit |
May. 1, 1979 |
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