| 摘要 |
There is provided an intra coding method that can increase a coding processing speed. In YCbCr image, Cb image and Cr image that are insensitive to human eyes are reduced in size. That is, the Cb image and the Cr image are respectively divided into a plurality of first blocks. Using a sub-sampling, the first block is reduced to a second block. For example, the size of the second block may be reduced to half the size of the first block. The second block can consists of some of the pixels contained in the first block.
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