Image analysis – Image compression or coding
Patent
1994-08-24
1998-12-08
Chin, Wellington
Image analysis
Image compression or coding
382246, 382239, 382234, G26K 936, G26K 900
Patent
active
058481923
ABSTRACT:
A system for processing a stream of digital bit sets, each related to a different subject in a passing array, and including an arrangement for compressing the bit-sets and sending the results to an utilization stage; plus: a preprocessing stage for distributing each bit set in N parallel bit-compression paths, with all input sent to a common input buffer feeding these paths and each compression path being adapted to execute a prescribed first compression to ascertain "initial factors", and then a prescribed second compression to use the initial factors, with the second compression values selected according to "word count" factors derived from results of the first compression, and to thus provide a prescribed time-compressed output to the utilization stage; with both compressions performed according to JPEG standards; and the second compressions performed using prescribed selected QM and Huffman table values, and with a post processor stage to accept the compressed; data as 32-bit output and funnel it down to 16-bit output presented to the utilization stage.
REFERENCES:
patent: 4843632 (1989-06-01), Lee et al.
patent: 5095374 (1992-03-01), Klein et al.
patent: 5109433 (1992-04-01), Notenboom
patent: 5267051 (1993-11-01), Dellert et al.
patent: 5287420 (1994-02-01), Barrett
patent: 5313534 (1994-05-01), Burel
patent: 5339368 (1994-08-01), Higgins-Luthman
patent: 5479527 (1995-12-01), Chen
Kidd Robert C.
Smith Gerald R.
Chin Wellington
Corrielus Jean B
McCormack John J.
Starr Mark T.
Unisys Corporation
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