Image encoding and decoding method and apparatus

Details Image encoding and decoding method and apparatus Image encoding and decoding method and apparatus

H - Electricity

04

N

H04N 7/50 (2006.01)

Patent

CA 2680140

An image encoding device includes: a predictor which predicts an input image signal and generates a predicted image signal; a subtractor which calculates a difference between the input image signal and the predicted image signal to generate a predicted residual signal; a converter which converts the predicted residual signal to generate a conversion coefficient; a modulation unit which modulates a quantization matrix to obtain a modulated quantization matrix; a quantizer which quantizes the conversion coefficient by using the modulated quantization matrix to generate a quantized conversion coefficient; and an encoder which encodes the quantized conversion coefficient and the modulation index to generate encoded data.

Dispositif de codage d'image comprenant : un prédicteur qui prédit un signal d'image d'entrée et génère un signal d'image prédit ; un soustracteur qui calcule une différence entre le signal d'image d'entrée et le signal d'image prédit pour générer un signal résiduel prédit ; un convertisseur qui convertit le signal résiduel prédit pour générer un coefficient de conversion ; une unité de modulation qui module une matrice de quantification pour obtenir une matrice de quantification modulée ; un quantificateur qui quantifie le coefficient de conversion en utilisant la matrice de quantification modulée pour générer un coefficient de conversion quantifié ; et un codeur qui code le coefficient de conversion quantifié et l'indice de modulation pour générer des données codées.

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