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    • 54. 再颁专利
    • Video coding method and decoding method and devices thereof
    • 视频编码方法及其解码方法及装置
    • USRE39455E1
    • 2007-01-02
    • US09691857
    • 2000-10-18
    • Thiow Keng Tan
    • Thiow Keng Tan
    • H04B1/66H04N7/32
    • H04N19/51H04N19/577
    • 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.
    • 使用新的预测编码来增加时间帧速率和编码效率,而不引入过多的延迟。 目前,使用线性运动模型,从前向预测帧中的相应块的运动矢量导出双向预测帧中的块的运动矢量。 然而,当图像序列中的运动不是线性时,该方法无效。 如果使用非线性运动模型,则可以进一步提高该方法的效率。 在该模型中,增量运动矢量分别被添加到或从所得到的前向和后向运动矢量中减去。 编码器执行附加搜索以确定是否需要增量运动矢量。 传输的比特流中的该增量运动矢量的存在被发送到解码器,解码器然后采取适当的动作来利用增量运动矢量来导出用于双向预测的块的有效的前向和后向运动矢量。