发明名称 Video coding method and decoding method and devices thereof
摘要 A new predictive coding is used to increase the temporal frame rate and coding efficiency without introducing excessive delay. Currently the motion vector for the blocks in the bi-directionally predicted frame is derived from the motion vector of the corresponding block in the forward predicted frame using a linear motion model. This however is not effective when the motion in the image sequence is not linear. The efficiency of this method can be further improved if a non-linear motion model is used. In this model a delta motion vector is added to or subtracted from the derived forward and backward motion vector, respectively. The encoder performs an additional search to determine if there is a need for the delta motion vector. The presence of this delta motion vector in the transmitted bitstream is signalled to the decoder which then takes the appropriate action to make use of the delta motion vector to derive the effective forward and backward motion vectors for the bi-directionally predicted block.
申请公布号 USRE40080(E1) 申请公布日期 2008.02.19
申请号 US20000691858 申请日期 2000.10.18
申请人 MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. 发明人 TAN THIOW KENG
分类号 H04B1/66 主分类号 H04B1/66
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