Encoding apparatus with two stages of data compression

Details Encoding apparatus with two stages of data compression Encoding apparatus with two stages of data compression

1991-03-29

1992-11-24

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

358426, 358430, 358433, H04N 1415, H04N 1417

Patent

active

051669870

ABSTRACT:
In a highly efficient encoding apparatus, image data are encoded by multiple encoding techniques so as to obtain highly compressed image data. For example, a block segmentation circuit segments received digital image data into a plurality of relatively small blocks each having a plurality of pixels, and such small blocks are encoded by a block encoding circuit so as to compress the pixel data in each of the small blocks. The output data of the block encoding circuit are encoded by a predictive encoding circuit so as to obtain highly compressed image data.

REFERENCES:
patent: 4196448 (1980-04-01), Whitehouse et al.
patent: 4703352 (1987-10-01), Kondo
patent: 4710811 (1987-12-01), Kondo
patent: 4788598 (1988-11-01), Ochi et al.
patent: 5021891 (1991-06-01), Lee
patent: 5046121 (1991-09-01), Yonekawa et al.
patent: 5051840 (1991-09-01), Watanabe et al.
patent: 5063608 (1991-11-01), Siegel

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