Abstract： |
The invention belongs to image coding technology field, which relates to a acquisition method of reference image for sampling block group coding, pointing the vertical sampling block group structure, the reference buffer is arranged with at least n reference images, pointing to the first image: when coding the upper layer VS1 macro block, the reconstructed image pixel of the coded current image is used as the predicting value, when coding the VS2 macro block, the reconstructing image of all the VS1 macro block of current image and the lower interpolation image are used as reference images and put into the reference buffer; pointing to the second image, it uses the former n or n+1/2 reconstructed or interpolation images as reference images; pointing to the third image, the former n-1 reconstructed or interpolation image are used as the reference images, the invention can upgrades the coding efficiency and save the usage of the memory. |
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