Image analysis – Image compression or coding – Adaptive coding
Patent
1994-03-14
1995-08-22
Couso, Yon J.
Image analysis
Image compression or coding
Adaptive coding
348420, 348422, 382253, G06K 936, G06K 946
Patent
active
054448000
ABSTRACT:
There is disclosed a method and apparatus for data coding for image transmission or storage in which vector quantization enables good image quality at reduced transmission or storage bit rates by directly employing spatial contiguity with a prior block of data, or a one-row-prior block of data in a way that directly controls intensity continuity between spatially close pixels of the adjacent blocks in two directions. The technique includes both "side-match" (no overlap) and "overlap-match" vector quantization. The technique is relative demanding of memory space and logic capacity in the encoding of the image information; but the decoding can be relatively simple and thus is well adapted for archiving and subsequent retrieval of two-dimensional information.
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patent: 4646356 (1987-02-01), Anderson et al.
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patent: 4811112 (1989-03-01), Rutledge
Aravind, R. and Gersho, Allen; "Image Compression Based on Vector Quantization With Finite Memory," Optical Engineering, vol. 26, pp. 570-580 Jul. 1987.
AT&T Corp.
Couso Yon J.
Olson Katharyn E.
Wisner Wilford L.
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