Patent ID: 6144769
Filing Date: 2000-11-07
Classification: G06T,H04N

Abstract:
A video coding device, comprising:a motion-compensated predicting portion for performing motion-compensated interframe-prediction for an input digital video signal to obtain a prediction-image signal;a first band-dividing portion for dividing said input digital video signal into a plurality of frequency band components;a second band-dividing portion for dividing a signal resulting from a difference between said input digital video signal and said prediction-image signal into a plurality of frequency band components;a plurality of intraframe coding portions for intraframe encoding each of said plurality of frequency band components received from said first band-dividing portion;a plurality of interframe coding portions for interframe encoding each of said plurality of frequency band components received from said second band-dividing portion,wherein each of said plurality of intraframe and interframe encoded frequency band components are output to an external circuit via a plurality of coding mode selecting portions corresponding to each of said plurality of frequency band components; anda hierarchical refresh control portion for determining whether said plurality of frequency band components are to be interframely or intraframely encoded by outputting a refresh commands to said corresponding code mode selecting portions, whereupon each of said received plurality of frequency band components are encoded by the selected intraframe or interframe coding portion for output to said external circuit.