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    • 72. 发明授权
    • B picture mode determining method and apparatus in video coding system
    • B图像模式确定方法和装置在视频编码系统中
    • US07031387B2
    • 2006-04-18
    • US10101130
    • 2002-03-19
    • Byeong Moon Jeon
    • Byeong Moon Jeon
    • H04B1/66
    • H04N19/577
    • A B picture mode determining method and apparatus in a video coding system includes the steps of: setting sum of absolute difference (SAD) initial values of a 4×4 and 16×16 intra prediction mode, a forward prediction mode, a backward prediction mode, a bi-directional prediction mode and a direct prediction mode; calculating the SAD values of each mode; and selecting a mode having the smallest SAD value from the SAD values of the modes as a prediction mode for a B picture coding. A penalty value in consideration of the overhead bit of each mode is set as an SAD initial value, and especially, in order for the direct mode to be selected for the flat regions having the zero motions, the SAD initial value of the direct mode is set as −16×QP0(QP), so that the bit rate is considerably reduced and the coding performance of image information can be improved.
    • AB图像模式确定方法和装置包括以下步骤:设置4×4和16×16帧内预测模式的绝对差(SAD)初始值的和,前向预测模式,后向预测模式,双向 预测模式和直接预测模式; 计算每种模式的SAD值; 以及从模式的SAD值中选择具有最小SAD值的模式作为用于B图像编码的预测模式。 考虑到每个模式的开销比特的惩罚值被设置为SAD初始值,特别是为了对具有零运动的平坦区域选择直接模式,直接模式的SAD初始值为 设置为-16xQP <0>(QP),使得比特率显着降低,并且可以提高图像信息的编码性能。