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Class Information
Number: 348/607
Name: Television > Image signal processing circuitry specific to television > Noise or undesired signal reduction
Description: Subject matter including specific circuitry for the elimination of unwanted signals generated in the system, or by the transmission medium.

Sub-classes under this class:

Class Number Class Name Patents
348/615 Blackspot or shading correction (e.g., corrects for fixed pattern defects) 124
348/616 Dropout compensator (e.g., replacement type) 147
348/624 For color television 170
348/618 For removal of low amplitude random noise (e.g., variable bandwidth) 110
348/614 Ghost elimination (e.g., multipath) 335
348/608 Processing at encoder or transmitter (e.g., pre-correction) 156

Patents under this class:
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Patent Number Title Of Patent Date Issued
5751361 Method and apparatus for correcting errors in a transmitted video signal May. 12, 1998
5748226 Digital television receiver with adaptive filter circuitry for suppressing NTSC co-channel interference May. 5, 1998
5745187 Method and apparatus for combating co-channel NTSC interference for digital TV transmission using a bank of rejection filters Apr. 28, 1998
5745188 Apparatus for suppressing interference in television video signal Apr. 28, 1998
5742355 Method and apparatus for reducing noise in a video signal Apr. 21, 1998
5742356 Mobile body TV receiver having optimal display frame pattern selection capability Apr. 21, 1998
5734757 Post-processing method and apparatus for use in an image signal decoding system Mar. 31, 1998
5729301 Method and device for reducing moire when displaying a video signal Mar. 17, 1998
5726718 Error diffusion filter for DMD display Mar. 10, 1998
5719641 VOD reception with demodulation and quantization held during carrier switching to produce a video signal before the carrier switching Feb. 17, 1998
5719793 Recursive noise reduction device having improved adaptability with respect to input image data Feb. 17, 1998
5715000 Noise reduction circuit for reducing noise contained in video signal Feb. 3, 1998
5694177 Video signal filtering with temporally spaced samples in time past Dec. 2, 1997
5686966 Digital data transmission system for transmitting digital data in a predetermined bandwidth without distortion Nov. 11, 1997
5680179 Methods and apparatus for filtering images using fuzzy logic Oct. 21, 1997
5671066 Apparatus for recording and reproducing video signals with preemphasis and deemphasis processes Sep. 23, 1997
5668914 Video signal reproduction processing method and apparatus for reproduction of a recorded video signal as either a sharp still image or a clear moving image Sep. 16, 1997
5664045 Video signal processor for compensating skew and eliminating noise Sep. 2, 1997
5661528 Apparatus and method for controlling operation of a high defination television adaptive equalizer Aug. 26, 1997
5661529 Measurement of noise impairments of TV signals Aug. 26, 1997
5657401 Method and apparatus for measuring noise using a plurality of noise estimates Aug. 12, 1997
5648822 Method and apparatus for combating co-channel NTSC interference using a variable-comb filter for digital TV transmission Jul. 15, 1997
5648987 Rapid-update adaptive channel-equalization filtering for digital radio receivers, such as HDTV receivers Jul. 15, 1997
5638134 Digital filter for picture data and digital filter system Jun. 10, 1997
5635990 Apparatus for cancelling noise and improving details of images Jun. 3, 1997
5625421 Suppression of sawtooth artifacts in an interlace-to-progressive converted signal Apr. 29, 1997
5623319 Ghost cancellation reference signal detection and synchronization circuit Apr. 22, 1997
5623320 Ghost prevention apparatus for television Apr. 22, 1997
5621474 Filter working on image digital signals for video appliances Apr. 15, 1997
5621475 Circuit for judging the existence of television image signals Apr. 15, 1997
5621476 Reducing the effects of noise in level number transformation Apr. 15, 1997
5612978 Method and apparatus for real-time adaptive interference cancellation in dynamic environments Mar. 18, 1997
5610729 Noise reduction apparatus for reducing noise in decoding of moving picture sequence Mar. 11, 1997
5606375 Method for enhancing detail in color signals and circuitry for implementing that method in color video equipment Feb. 25, 1997
5606631 Method for detecting and removing errors exceeding a specific contrast in digital video signals Feb. 25, 1997
5604856 Motion compensated noise reduction method and system for computer generated images Feb. 18, 1997
5602587 Correction of influence of alternating voltage coupling in a signal chain of scanning opto-electronic sensors Feb. 11, 1997
5602599 Apparatus and method incorporating digital video processing for reduction/magnification of digital video images to produce low-pass filtered images Feb. 11, 1997
5602601 Phase error corrector for HDTV reception system Feb. 11, 1997
5602602 Method and apparatus for combating co-channel NTSC interference for digital TV transmission having a simplified rejection filter Feb. 11, 1997
5598226 Reparing corrupted data in a frame of an image sequence Jan. 28, 1997
5594496 Detection of co-channel interference in digital television signals Jan. 14, 1997
5592231 Motion adaptive scan-rate conversion using directional edge interpolation Jan. 7, 1997
5585859 System for reducing beat type impairments in a TV signal Dec. 17, 1996
5574512 Motion adaptive video noise reduction system Nov. 12, 1996
5572262 Receiver based methods and devices for combating co-channel NTSC interference in digital transmission Nov. 5, 1996
5561532 Image reproducing apparatus Oct. 1, 1996
5555028 Post-processing method and apparatus for use in an image signal decoding system Sep. 10, 1996
5555029 Method and apparatus for post-processing decoded image data Sep. 10, 1996
5550596 Digital television signal processing system including a co-channel rejection filter Aug. 27, 1996

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