Television – Bandwidth reduction system – Data rate reduction
Patent
1995-12-28
1998-03-03
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348409, 348415, 348699, H04N 732
Patent
active
057240981
ABSTRACT:
An interframe coding system which eliminates higher frequency components contained in an image signal effectively and adaptively with an adaptive filter provided in a coding loop. The adaptive filter eliminates the higher frequency components with the optimal filtering intensity for an image signal specified with a filtering coefficient which is decided by a filter controller. The filtering coefficient is decided by normalization of the difference between an input image signal and a predictive signal from a frame memory by the "Activity" of the input image signal or the predictive signal. The "Activity" can be based upon the sum of the absolute or squared difference values based upon the mean value of luminance intensity of pixels of the image signal.
REFERENCES:
patent: 4047221 (1977-09-01), Yasuda et al.
patent: 4703350 (1987-10-01), Hinman
patent: 4706260 (1987-11-01), Fedele et al.
patent: 4794455 (1988-12-01), Ericsson
patent: 5020401 (1991-06-01), Murakami et al.
patent: 5089889 (1992-02-01), Sugiyama
patent: 5126841 (1992-06-01), Tanaka et al.
patent: 5194950 (1993-03-01), Murakami et al.
patent: 5237410 (1993-08-01), Inoue
patent: 5365271 (1994-11-01), Asano
Helgeson, Tanji & Kilgore "Impact of Recent Compression/Decompression Technologies in Video Distribution Systems" Honeywell, Inc. 1992 IEEE Oct. 5, 1992, pp. 568-572.
Murakami, Kinjo, Kamizawa & Shimada "A 24 bit DSP for Motion Video Codec and Software Development Support System" Mitsubishi Electric Corporation, 1989 IEEE, pp. 1929-1932.
Ohtsuka, Nakasu, Shishikui, Imaizumi & Nakanishi "Development of 135 Mbit/s HDTV Codec" Signal Processing: Image Communication 4. 1992, pp. 379-387.
Kato Yoshiaki
Murakami Tokumichi
Shimada Toshiaki
Chin Tommy P.
Lee Richard
Mitsubishi Denki & Kabushiki Kaisha
LandOfFree
Interframe coding method and apparatus utilizing a filter contro does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interframe coding method and apparatus utilizing a filter contro, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interframe coding method and apparatus utilizing a filter contro will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2253150