IMAGE ENCODING AND DECODING METHOD AND DEVICE

摘要

The present invention concerns an image encoding method and device for improving image compression efficiency by compensating for losses due to residual block quantization in the frequency domain, and it concerns a decoding method and device therefor. The image encoding method according to the present invention is characterised in that: a predictive macroblock is generated for the current macroblock; a first residual block is generated which constitutes the difference between the predictive macroblock and the current macroblock; compensation is carried out for quantization losses relating to the first residual block in the frequency domain, and a compensating residual block is generated; and then the compensating residual block and the predictive macroblock are added, and the predictive macroblock is compensated.