公开(公告)号：US06498865B1

公开(公告)日：2002-12-24

申请号：US09248462

申请日：1999-02-11

申请人： James C. Brailean ,  Mark R. Banham ,  Cheuk L. Chan ,  Osama Al-Shaykh ,  Jiangtao Wen

发明人： James C. Brailean ,  Mark R. Banham ,  Cheuk L. Chan ,  Osama Al-Shaykh ,  Jiangtao Wen

IPC分类号： G06K936

CPC分类号： H04N21/23608 ,  H04N19/40 ,  H04N19/66 ,  H04N19/68 ,  H04N21/238

摘要： A method and apparatus automatically manipulates a digitally compressed video bitstream such that the result is compatible with different bandwidth and error resilience requirements at a receiving point in a heterogeneous communication network. The method and device provide for analysis of bitstream header information to determine its relevant coding syntax parameters. Feedback from the receiving point on the network is then used to identify error robustness requirements for an intermediate bitstream. The bitstream is then manipulated by an error robustness regulator to achieve error protection in the network. The bitrate requirements of the network establish a selection of relevant and irrelevant bits from the bitstream The present method and device include identification of irrelevant and low priority video bits; intentional introduction of packet losses to reduce bitrate while maintaining visual quality; use of replacement tags for irrelevant and low priority components of the bitstream for compatible decoding by a wide array of decoders; and insertion of resynchronization tags and translation of predictively coded video packet bits for the improvement of error resilience.

摘要翻译： 一种方法和装置自动地操纵数字压缩的视频比特流，使得该结果与异构通信网络中接收点处的不同带宽和错误弹性要求兼容。 该方法和装置提供对比特流报头信息的分析以确定其相关的编码语法参数。 然后使用网络上接收点的反馈来识别中间比特流的误码鲁棒性要求。 然后通过误差鲁棒性调节器来操纵比特流以实现网络中的错误保护。 网络的比特率要求从比特流建立相关和不相关比特的选择。本方法和设备包括识别不相关和低优先级的视频比特; 有意引入分组丢失以降低比特率，同时保持视觉质量; 使用替代标签用于比特流的不相关和低优先级组件，用于通过广泛的解码器进行兼容解码; 并插入重新同步标签和翻译预测编码的视频数据包位，以提高错误恢复能力。