Method and apparatus for coding moving image signal

Details Method and apparatus for coding moving image signal Method and apparatus for coding moving image signal

H - Electricity

04

N

H04N 7/12 (2006.01) G06T 9/00 (2006.01) G06T 9/40 (2006.01) H04N 7/26 (2006.01) H04N 7/50 (2006.01)

Patent

CA 2051891

According to a method and apparatus for coding a moving image signal, a change between a current frame and a previous frame is detected in units of blocks obtained by dividing a frame constituted by an input moving image signal into a plurality of pixels. A first valid block map is formed in units of frames by determining valid and invalid blocks on the basis of the detected changes. A first weighting operation of the formed first valid block map is performed. A second weighting operation of a fourth valid block map of the previous frame is performed. A weighted second valid block map is obtained by adding/synthesizing the first and fourth valid block maps respectively subjected to the first and second weighting operations. A third valid block map is obtained by performing predetermined segmentation of the second valid block map. A fourth valid block map is obtained by determining validity of an isolated invalid block in the third valid block map by referring to neighboring blocks. A valid block region of the fourth valid block map is coded.

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