ENCODING/DECODING METHOD FOR GRACEFUL DEGRADATION IN OPERATION OF IMAGE COMPRESSION SYSTEM

摘要

PURPOSE: An encoding/decoding method for graceful degradation in operation of an image compression system is provided for better interaction between the services having different resolutions or different formats. CONSTITUTION: An encoder(110) utilizes the graceful degradation of operation by encoding video sequences. The output of the encoder is the coded data of the video sequence output from an encoding buffer(120). The video sequence and the coded data are output to a complexity parameter encoder(130). The data are transmitted to a system encoder and multiplexer(140) together with the output of the encoding buffer. A demultiplexer and system decoder(160) receives the system-multiplexed stream. The bit stream is inversely quantized into a base stream. The base video stream is output to a decoding buffer(170). A complexity parameter is output to a scheduler and complexity estimator(180). The base video stream is output to a decoder(190) from the decoding buffer. The decoder stands by a command inputted from the scheduler/complexity estimator. The complexity estimator provides the graceful degradation in operation of the decoder.