Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Patent
1997-02-24
2000-10-17
Chevalier, Robert
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
386 27, H04N 591, H04N 5917
Patent
active
061343749
ABSTRACT:
Input picture information is divided into first and second division-resultant signals. Y-signal DCT blocks, Cr-signal DCT blocks, and Cb-signal DCT blocks are generated from the first division-resultant signal. Y-signal DCT blocks, Cr-signal DCT blocks, and Cb-signal DCT blocks are generated from the second division-resultant signal. Dummy DCT blocks are generated which are distinguishable from the Y-signal DCT blocks related to the first and second division-resultant signals. The Y-signal DCT blocks, the Cr-signal DCT blocks, and the Cb-signal DCT blocks related to the first division-resultant signal, and the dummy DCT blocks are grouped into macro-blocks each having two Y-signal DCT blocks, one Cr-signal DCT block, one Cb-signal DCT block, and two dummy DCT blocks to modify the first-division-resultant signal into a first modification-resultant signal. The Y-signal DCT blocks, the Cr-signal DCT blocks, and the Cb-signal DCT blocks related to the second division-resultant signal, and the dummy DCT blocks are grouped into macro-blocks each having two Y-signal DCT blocks, one Cr-signal DCT block, one Cb-signal DCT block, and two dummy DCT blocks to modify the second division-resultant signal into a second modification-resultant signal. The first modification-resultant signal is compressed by DCT and variable length encoding while a data amount of the first compression-resultant signal per given number of macro-blocks is maintained at a fixed amount. The second modification-resultant signal is similarly compressed.
REFERENCES:
patent: 5841936 (1998-11-01), Kobayashi
patent: 5848220 (1998-12-01), Henmi et al.
"Future of the Image Information Recording Technologies" by C. Yamamitsu; pp., 1222-1229 (w/English translation).
Harumatsu Mitsuo
Ohishi Takeo
Chevalier Robert
Victor Company of Japan Ltd.
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