Video encoding method and apparatus and video decoding method and apparatus

摘要

A video encoding method of performing motion compensated prediction inter-frame encoding on a macroblock of a video picture, characterised by comprising: encoding data including a prediction error signal for each macroblock, an index indicating a combination of a plurality of reference frames, information concerning a display time of an encoded frame, and information of a motion vector between a to-be-encoded macroblock and at least one reference frame; extracting a plurality of reference macroblocks from the plurality of reference frames in accordance with the information of the motion vector and the encoded index; calculating inter-frame distances between the plurality of reference frames and the to-be-encoded frame in accordance with the information concerning the display time; generating a prediction macroblock by calculating a linear sum of the plurality of extracted reference macroblocks using weighting factors determined in accordance with the calculated inter-frame distances; and generating a local video signal by adding the prediction macroblock and the prediction error signal.