MOVING IMAGE HIERARCHICAL ENCODING APPARATUS, MOVING IMAGE HIERARCHICAL ENCODING METHOD, MOVING IMAGE HIERARCHICAL ENCODING PROGRAM, MOVING IMAGE HIERARCHICAL DECODING APPARATUS, MOVING IMAGE HIERARCHICAL DECODING METHOD, AND MOVING IMAGE HIERARCHICAL DECODING PROGRAM

摘要

PROBLEM TO BE SOLVED: To improve efficiency of prediction between layers in hierarchical encoding, and to rightly perform decoding.

SOLUTION: A spatial decimator 104 performs spatial reduction processing on an input video signal, and a base layer encoder 105 encodes the spatially reduced signal. A base layer decoder 106 locally decodes base layer encoded data to produce a locally decoded signal. A spatial interpolator 107 performs spatial enlargement processing on the locally decoded signal to produce a high-resolution decoded signal. A spatial high-frequency component estimator/enlarger 108 estimates/enlarges a spatial high-frequency component on the basis of the locally decoded signal. An adder 111 adds the spatial high-frequency component and the high-resolution decoded signal to produce an inter-layer prediction signal. and an enhancement layer encoder 109 performs encoding with prediction using the inter-layer prediction signal. A multiplexer 110 multiplexes encoded data or the like of a base layer and an enhancement layer.

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