IMAGE CODER COPING WITH FEATURE OF PICTURE

摘要

PROBLEM TO BE SOLVED: To provide a moving picture coder that decides a group of picture GOP size and a predicted frame interval in response to the feature of a received picture. ;SOLUTION: A frame memory 3 stores an input picture in advance, an inter- two-picture change analysis section 32 extracts a change between consecutive pictures, a GOP border position decision section 33 decides a GOP border position on the basis of inter-picture change information A from the inter-two-picture change analysis section 32. Then a simple motion retrieval section 34 applies simple motion retrieval to a picture in one GOP on the basis of GOP border position information B and picture information stored in the frame memory 31 to calculate motion feature prediction information C. A prediction frame interval decision section 35 calculates predicted frame interval information D from the motion characteristic prediction information C. The inter-picture change information A, the GOP border position information B, the motion feature prediction information C and the predicted frame interval information D are given to a coding complexity prediction section, which calculates coding complexity prediction information E in each frame coding mode.;COPYRIGHT: (C)2000,JPO