IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE

摘要

PROBLEM TO BE SOLVED: To eliminate picture quality degradation and encoding efficiency decline due to drift in scalable encoding capable of varying resolution and picture quality in multiple hierarchies. SOLUTION: A motion compensation prediction and conversion encoding device using motion compensation prediction in a conversion coefficient region for the respective N×N pieces (N: a natural number) of conversion coefficients is provided with a means 220 for preparing the conversion coefficient pyramid of N hierarchies by selecting the n×n pieces n=1 to N} of locally decoded conversion coefficients from a low band, a means 212 for preparing the reproducing image pyramid of N hierarchies by executing inverse conversion for the respective hierarchies to the conversion coefficient pyramid of N hierarchies, a means 213 for storing the reproducing picture pyramid of N hierarchies for the respective hierarchies, a means 214 for referring to the pictures stored in the storage means 213 and preparing motion compensation prediction signals for the respective hierarchies, a means 215 for converting the motion compensation prediction signals to the conversion coefficients for the respective hierarchies and a means 230 for preparing a motion compensation predicted value by integrating the conversion coefficients.