Coding apparatus and method

Details Coding apparatus and method Coding apparatus and method

2005-03-08

2005-03-08

Boudreau, Leo (Department: 2621)

Image analysis

Image compression or coding

Lossless compression

C382S240000

Reexamination Certificate

active

06865299

ABSTRACT:
A method of performing variable-length coding for a multilevel image with simple processing, and a processing apparatus for executing this variable-length coding method at a high speed have not been established yet. According to this invention, discrete wavelet transformation processing is performed for multilevel image data to quantize the image data in units of subblocks of respective frequency components. An optimal shift parameter is easily determined at a high speed for each subblock. This realizes high-speed variable-length coding based on the parameter.

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