| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellent image data decoding device.SOLUTION: An image data decoding device: induces a luminance intra prediction mode and a color difference intra prediction mode; decides sizes of a luminance conversion unit and a color difference conversion unit using luminance conversion size information; performs adaptive filtering of a reference pixel of a current luminance block on the basis of the luminance intra prediction mode and the size of the luminance conversion unit; generates prediction blocks of a luminance block and a color difference block; and generates a residual luminance block and a residual color difference block. Thus, the image data decoding device can reduce complexity of coding through shortening of a distance of intra prediction, a reduction in bit amount required for coding the intra prediction mode and residual signals of luminance and color difference components, adaptive coding of the intra prediction mode, and the adaptive filtering of the reference pixel.SELECTED DRAWING: Figure 1 |
