Television – Bandwidth reduction system – Data rate reduction
Patent
1997-06-23
1999-11-16
Tung, Bryan
Television
Bandwidth reduction system
Data rate reduction
348410, 348424, 382232, 382236, 382238, 36471502, H04N 712, G06K 940
Patent
active
059867116
ABSTRACT:
The video memory requisite of an MPEG decoder effecting a decompression of the I, P and optionally also of the B picture according to the MPEG compression algorithm and requiring the storing in respective buffers organized in said video memory of the respective MPEG-decompressed data, may be dynamically reduced by subsampling and recompressing according to a ADPCM algorithm of at least the data pertaining to the I and P pictures before coding and storing them in the respective buffers. Subsequently, the stored data are decoded, decompressed and upsampled for reconstructing blocks of pels to be sent to a macroblock-to-raster scan conversion circuit.
REFERENCES:
patent: 5515105 (1996-05-01), Lim
patent: 5526052 (1996-06-01), Ar
patent: 5627601 (1997-05-01), Ran et al.
patent: 5708732 (1998-01-01), Merhav et al.
patent: 5777677 (1998-07-01), Linzer et al.
patent: 5818530 (1998-10-01), Canfield et al.
patent: 5844608 (1998-12-01), Yu et al.
Digest of Technical Papers of the International Conference on Consu Electronics, "An Integrated MPEG-1 and MPEG-2 Decoder", IEEE (Jun. 21, 1994), pp. 324-325.
STMicroelectronics S.r.l.
Tung Bryan
Vo Tung
LandOfFree
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