Image coding device and method

Details Image coding device and method Image coding device and method

2006-03-07

2006-03-07

Dang, Duy M. (Department: 2627)

Image analysis

Image compression or coding

Adaptive coding

C382S251000

Reexamination Certificate

active

07010170

ABSTRACT:
To compress and encode an image by dividing the image into units of blocks, a method in which features of each block are detected and different operations are applied according to the features has been used often so as to reduce coding distortion and improve subjective image quality, but this method requires additional information representing features of blocks to be recorded and transmitted together, thereby deteriorating the coding efficiency. A rounding operation with respect to a calculation result is modified so that the rounding operation is varied according to features detected as to each block. By so doing, adaptive compressing and coding is implemented by only the processing upon coding, without recording or transmitting additional information.

REFERENCES:
patent: 6351568 (2002-02-01), Andrew

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