VIDEO ENCODING METHOD AND APPARATUS AND VIDEO DECODING METHOD AND APPARATUS

摘要

A video picture is encoded by adaptively switching between the operation of using a plurality of decoded video frames as reference frames and the operation of using one decoded video frame as reference frame. A predictive macroblock picture is generated from either a plurality of reference frames or from a single reference block. When the macroblock is generated from a plurality of macroblocks there is used either a the average value of the macroblock as a predictive macroblock picture or a linear extrapolation or linear interpolation in accordance with the inter-frame distance between the reference frames and a to-be-encoded frame. Fig.1