Television – Bandwidth reduction system – Data rate reduction
Patent
1995-12-27
1998-12-08
Olms, Douglas W.
Television
Bandwidth reduction system
Data rate reduction
H04N 712, H04N 1102, H04N 1104
Patent
active
058477624
ABSTRACT:
An MPEG compatible decoder receives encoded, compressed data in the form of image representative pixel blocks. The decoder includes a frame memory (20) for storing reconstructed pixel blocks incident to the decoding process. The previously decompressed data is re-compressed (30) before being written to the memory. Stored decompressed data is decompressed for display (34, 26), or as needed for decoding functions such as motion compensation processing (32, 22). The compression performed before writing data to memory is block-based compression using compressed data from one of two different compression paths (FIG. 3, 314, 320) which compress a given pixel block simultaneously.
REFERENCES:
patent: 5384644 (1995-01-01), Yamagami
patent: 5576765 (1996-11-01), Cheney et al.
patent: 5576840 (1996-11-01), Fukushima
"Coding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC29/WG11 NO702," dated may 10, 1994.
Peng H. Ang et al., Video Compression Makes Big Gains, IEEE Spectrum, Oct. 1991.
IBM MPEG-2 Decoder Chip User's Guide, pp.: 1-2, 1-3, 1-5, 1-6, 1-8, 1-9, 2-6, 2-7 and 3-1, Jun. 1994.
Beyers, Jr. Billy Wesley
Canfield Barth Alan
Lam Wai-Man
Herrmann Eric P.
Kurdyla Ronald H.
Olms Douglas W.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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