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公开(公告)号：US5986712A
公开(公告)日：1999-11-16
申请号：US4661
申请日：1998-01-08
CPC分类号： H04N19/174 , H04N19/115 , H04N19/124 , H04N19/14 , H04N19/149 , H04N19/159 , H04N19/176 , H04N19/61 , H04N19/146 , H04N19/152 , H04N19/30
摘要： A current picture partitioned into a plurality of partitions is received and encoded by determining a total target number of encoded bits for the current picture to avoid overflow or underflow of a video buffer verifier (VBV) maintained by an encoder. The encoder determines a local target number of encoded bits for each partition of the current picture, in accordance with the total target number. A plurality of partition encoders encode each partition, respectively, in accordance with the local target number for said each partition, wherein each partition encoder maintains a local VBV having a local VBV fullness, to monitor local underflow or overflow conditions.
摘要翻译： 通过确定当前图像的编码比特的总目标数量来避免分割成多个分区的当前图像，以避免由编码器维持的视频缓冲器验证器（VBV）的上溢或下溢。 编码器根据总目标数量确定当前图像的每个分区的编码比特的本地目标数量。 多个分区编码器分别根据所述每个分区的本地目标编号对每个分区进行编码，其中每个分区编码器维护具有局部VBV饱和度的本地VBV，以监视本地下溢或溢出状况。
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公开(公告)号：US06996183B2
公开(公告)日：2006-02-07
申请号：US10014963
申请日：2001-12-11
IPC分类号： H04N7/12
摘要： A method and apparatus are disclosed for detecting scene cuts in a video bitstream. The number of coded macroblocks for each of a plurality of potential scene cuts is determined. The number of predicted macroblocks for each of the plurality of potential scene cuts is determined. A ratio of the number of coded macroblocks to the number of predicted macroblocks for each of a plurality frames corresponding to the potential scene cuts is then calculated. A frame having the desired ratio is selected. The ratio of the selected frame is compared to a threshold value. A scene cut is reported as detected responsive to a determination that the ratio of the selected frame satisfies the threshold value.
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