MULTIPLE REFERENCE FRAME BASED METHOD FOR ENCODING MOVING PICTURE

摘要

PURPOSE: A multiple reference frame based method for encoding a moving picture is provided to exclude an error area from a motion compensation area by tracing a lost area and an error-transmitted area by using NAK(Negative AcKnowledgement). CONSTITUTION: N number of frame memories(112-1-112-n) store n number of reference frames. A BMA(Block Matching Algorithm) based multiple frame predictor(114) is connected with the frame memories. BMA is executed to each reference frame for finding out the optimum motion vector. A frame before a frame lost by the finally decoded error is set up as a reference frame and it is judged whether a feedback channel exists in the reference frame. If so, negative acknowledgement is transmitted to trace the lost frame and a valid frame which is not lost in decoding is selected as the reference frame to be encoded.