Patent ID: 6028634
Filing Date: 2000-02-22
Classification: G06T,H04N

Abstract:
A video encoding apparatus comprising:an orthogonal transform circuit for orthogonally transforming an input picture signal to obtain a plurality of transform coefficients;a first local decoder for outputting first transform coefficients for a fine motion compensation prediction picture on the basis of a previous picture;a second local decoder for outputting second transform coefficients for a coarse motion compensation prediction picture on the basis of a current picture corresponding to the input picture signal;means for detecting a degree of motion compensation prediction in said second local decoder;a selector for selectively outputting the first and second transform coefficients in accordance with the degree of motion compensation prediction;a first calculator for calculating a difference between the transform coefficients of said orthogonal transform circuit and ones of the first and second transform coefficients which are selected by said selector, and outputting a motion compensation prediction error signal;a first quantizer for quantizing the motion compensation prediction error signal from said first calculator and outputting a first quantized motion compensation prediction error signal;a second calculator for calculating a difference between the second transform coefficients from said second local decoder and the transform coefficients from the orthogonal transform circuit, and outputting a second motion compensation prediction error signal;a second quantizer for quantizing the motion compensation prediction error signal from said second calculator, and outputting a second quantized motion compensation prediction error signal; andan encoder for encoding the first and second quantized motion compensation prediction error signals and outputting encoded signals.