Image coding method and apparatus using spatial predictive...

Details Image coding method and apparatus using spatial predictive... Image coding method and apparatus using spatial predictive...

2007-09-04

2007-09-04

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Interframe coding

C382S238000

Reexamination Certificate

active

10673186

ABSTRACT:
A method and apparatus for coding a chrominance component of an intra-image using spatial predictive coding and a method and apparatus for decoding the coded chrominance component are provided. The coding apparatus includes a variation calculator, which calculates a vertical variation and a horizontal variation with respect to a current block to be predictively coded among blocks having a predetermined size, into which a chrominance component of an input image is divided, using pixel values in an upper reference block adjacent to the current block and pixel values in a side reference block adjacent to the current block; a hybrid predictor, which divides the current block into a predetermined number of regions according to the vertical and horizontal variations and generates a prediction value of each pixel in each region using a pixel value in the upper reference block or a pixel value in the side reference block; a differential value generator, which generates a differential value between the prediction value and a corresponding real pixel value in the current block and codes the differential value using a predetermined coding method.

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