ENCODING DEVICE, DECODING DEVICE, AND PROGRAM

摘要

In the present invention, at least two component signals that represent luminance and a color difference in an original signal having a predetermined image format are encoded/decoded. This encoding device (10) is equipped with: a local decoding section (17-1, 17-2, 18-1, 18-2, 23-1, 23-2) that generates a locally decoded signal of a second component signal; a luminance-color difference prediction unit (4) that generates a parameter for normalizing the second component signal by comparing the original signal of a first component signal not yet encoded with the locally decoded signal of the second component signal in order to generate a luminance-color difference prediction signal; a prediction signal generation unit (22-1) that generates a prediction signal for an intra-screen prediction or a prediction signal for an inter-screen prediction regarding the first component signal; a synthesis unit (2) that performs a weighted addition of the prediction signal and the luminance-color difference prediction signal in order to generate a corrected prediction signal for the first component signal; and an encoding section (13-1, 14-1, 15-1, 16-1) that generates and encodes a difference signal between the corrected prediction signal and the original signal of the first component signal.

主权项

1. An encoding device for encoding at least two component signals indicating luminance and chrominance in an original signal in a predetermined image format, comprising:
a local decoder that generates a locally decoded signal of a second component signal of the at least two component signals; a comparator that generates a normalization parameter of the second component signal by comparing an original signal of a pre-decoded first component signal with the locally decoded signal of the second component signal; a luminance-chrominance predictor that generates a luminance-chrominance prediction signal for predicting the original signal of the first component signal by correcting the locally decoded signal of the second component signal using the normalization parameter; a prediction signal generator that generates a prediction signal of an intra-frame prediction by extrapolation or a prediction signal of an inter-frame prediction by motion-compensation, regarding the first component signal; a combiner that combine the prediction signal and the luminance-chrominance prediction signal by weight adding, and generates a corrected prediction signal of the first component signal; and an encoder that performs encoding by generating a difference signal between the corrected prediction signal and the original signal of the first component signal.