Adaptives Bildkompressionsverfahren und adaptive Bildkompressionsvorrichtung

摘要

The invention consists of a coder and a decoder. The encoder includes a difference picture operation, 102, 115, 103, for scaling down the motion picture stored in a frame memory, 2, by frame to obtain the difference picture between the previously transferred picture and the scaled down picture. A mode selector selects, based on the difference picture, whether the current frame is compressed according to an intra mode or an inter mode. Error picture transfer means for enlarging the compressed motion picture to the original picture, 111, 116, 112, 113, and obtaining and transferring the error between the compressed motion picture and the enlarged picture, 114, 3, 4. The decoding process being essentially the inverse of the above (see fig 2 not shown).