Image encoding method, image decoding method, image encoder,...

Details Image encoding method, image decoding method, image encoder,... Image encoding method, image decoding method, image encoder,...

2007-07-31

2007-07-31

Couso, Jose L. (Department: 2624)

Image analysis

Image compression or coding

Adaptive coding

Reexamination Certificate

active

10475570

ABSTRACT:
An orthogonal transform such as a DCT is carried out for image data D5of an image in blocks obtained by dividing a frame image, the image data D5being represented by spatial coordinates (Step S102), and a plurality of orthogonal transform coefficients D6as image data represented by spatial frequencies are generated. Then, the orthogonal transform coefficients D6undergo arithmetic coding, and thus coded data D7is generated (S103). Subsequently, in the arithmetic coding of the orthogonal transform coefficients, data characteristics of the orthogonal transform coefficients to be coded, which depend on the spatial frequencies, are considered, and a probability table is switched for a predetermined orthogonal transform coefficient, and thus the arithmetic coding is carried out. Thus, the image coding method, image decoding method, image coding apparatus, image decoding apparatus, program, computer data signal, and image transmission system, which are capable of enhancing efficiency of data compression in coded data by reflecting characteristics of image data to be coded on coding conditions, are realized.

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VCEG-M10 H.26L Test Model Long Term No. 8 (TML-8) draft0.

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