PICTURE ENCODING DEVICE

摘要

PURPOSE: To execute highly efficient picture compression, and to improve picture quality on the whole. CONSTITUTION: This device is provided with a frame memory 40 to store the plural frames of input picture data, a scene change detection circuit 31 to evaluate information quantity from the picture data of the plural frames and detect a scene change, a GOP length control circuit 34 and a compressing method selection circuit 32 to select a compression method by intra-frame encoding on the basis of the supply of scene change detection output and simultaneously execute the determination of GOP length, devices from a differencer 12 to a variable length encoding circuit 17 to compression-encoding the input picture data in conformity with the selected compressing method, and a local decoder and a movement detector 20 and a movement compensator 21, etc.