IMAGE CODING DEVICE, IMAGE CODING METHOD, PROGRAM THEREOF, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, AND PROGRAM THEREOF

摘要

A linear interpolation filter used for intra-prediction is applied to not only a luminance signal, but also a chrominance signal. A noise like contouring, which may occur in the chrominance signal, is reduced by performing control independently on the chrominance signal. Also, only a square block has been supported in related art. However, a rectangular block is also supported. Accordingly, 4:2:2 can be applied.

主权项

1. An image decoding device configured to decode coded data, which is generated by coding a pixel value of a block being decoded from a pixel in the neighbor of the block being decoded, the device comprising:
a decoding unit configured to decode the coded data and reproduce a prediction error; a generating unit configured to generate chrominance correction information representing whether or not correction processing is performed on a chrominance signal of the decoded pixel in the neighbor of the block being decoded, the correction processing including linear-interpolation processing; a correction unit configured to perform the correction processing on the chrominance signal based on the chrominance correction information; a predicting unit configured to predict a chrominance signal of the block being decoded from a chrominance signal corrected by the correction unit or a chrominance signal of the decoded pixel in the neighbor without the correction processing; and a reproducing unit configured to reproduce a pixel value of the block being decoded using a result of the prediction for the chrominance signal predicted by the predicting unit and the prediction error reproduced by the decoding unit.