Television – Bandwidth reduction system – Data rate reduction
Patent
1996-06-05
1998-05-19
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348411, 382232, H04N 712, H04N 1102, H04N 1104
Patent
active
057542392
ABSTRACT:
A motion compensated video processing method includes encoding a video frame group I.sub.0 -I.sub.7 into one in which one frame I.sub.0 of the group is a basic input frame or `I` frame, and the other frames B.sub.1 -B.sub.7 are derived from calculating the difference between a current frame and two neighboring frames so as to form `B` frames. The `B` frames are derived in a logarithmic progression. The `B` frames are quantized by applying selective quantization weighting to predetermined input frames. Encoding can be of the forms described as open loop or closed loop, preferably open loop. Decoding can be achieved by applying inverse quantization weighting to the input frames prior to selective summation in order to achieve a constant reconstruction error for each frame even though quantization errors carry over from each reconstruction stage.
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patent: 5113255 (1992-05-01), Nagata et al.
patent: 5132792 (1992-07-01), Yonemitsu et al.
patent: 5231484 (1993-07-01), Gonzales et al.
patent: 5305113 (1994-04-01), Iwamura et al.
patent: 5319468 (1994-06-01), Honjo
The Coding Technique of Motion Pictures For Storage Media, Television Acadamic Journal, vol. 45, No. 7, pp. 807-812 (1991) by Yamada Yasuhiro and Ueda, Motoharu, 1991.
Chin Tommy P.
Diep Nhon T.
Frommer William S.
Sony Corporation
Sony United Kingdom Limited
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