Television – Bandwidth reduction system – Data rate reduction
Patent
1995-04-05
1998-03-17
Chin, Tommy P.
Television
Bandwidth reduction system
Data rate reduction
348403, H04N 712
Patent
active
057292949
ABSTRACT:
A system and method for coding a digitized picture is described. The picture is divided into a plurality of regions and then each region is further divided into a plurality of subregions. Linear combinations of pixels in each subregion are then computed. A subregional adaptive quantisation parameter for each of the subregions is then determined based on the courseness tolerance of that subregion as established by processing the linear combinations. A regional quantisation parameter for each region is then determined as a function of the subregional adaptive quantisation parameters and then a quantisation level for each of the regions is determined based on the regional quantisation parameter. Once the regional quantisation level for a region has been determined, it is transform encoded. The transform encoded representations of the regions are concatenated to obtain an encoded representation of the entire picture which can then be decoded for display or storage.
REFERENCES:
patent: 4868653 (1989-09-01), Golin et al.
patent: 4972260 (1990-11-01), Fujikawa et al.
patent: 5051840 (1991-09-01), Watanabe et al.
patent: 5249053 (1993-09-01), Jain
patent: 5301242 (1994-04-01), Gonzales et al.
patent: 5351083 (1994-09-01), Tsukagoshi
patent: 5424777 (1995-06-01), Koga et al.
patent: 5459518 (1995-10-01), Wickstorm et al.
patent: 5521717 (1996-05-01), Maeda
F. Lavagetto and R. Leonardi, "Block Adaptive Quantization of Multiple Frame Motion Field," Visual Communications and Image Processing '91: Visual Communication, SPIE vol. 1605, pp. 534-545 (1991).
E. Viscito and C. Gonzales, "A Video Compression Algorithm With Adaptive Bit Allocation and Quantization," Visual Communications and Image Processing '91: Visual Communication, SPIE vol. 1605, pp. 58-72 (1991).
H.A. Peterson, A.J. Ahumada, Jr., & A.B. Watson, "32.3: Visibility of DCT Quantization Noise: Spatial Frequency Summation," 1994 SID International Symposium Digest of Technical Papers, vol. 25, pp. 704-707 (Jun. 1994).
Linzer Elliot Neil
Peterson Heidi Aarlien
Chin Tommy P.
Din Luanne
International Business Machines - Corporation
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