一种基于图像内容的数据分割方法

Data partitioning method based on picture content

基于对H.264数据分割技术的分析,提出一种基于图像内容的新的数据分割方法.它将视频流按照比特重要性分为3个子流,依次为:头信息、Intra宏块信息和部分Inter宏块信息、剩余Inter宏块信息.位于不同子流的Inter宏块由其对图像质量的影响程度进行区分,并由优化算法对其数量进行分配.实验结果表明,该方法较H.264标准中提出的数据分割技术,更符合图像内容和当前网络条件的变化.结合不等错误保护,能较大程度地改善视频流的传输质量.

By analyzing the data partitioning tool in H. 264, a novel data partitioning method based on the content of a picture is presented. It regroups video bitstreams into three separate sub-bitstreams according to importance ： header information, data of Intra-macroblocks and part of Inter-macroblocks, data of the remainder of Inter-macroblocks. The two parts of Inter-macroblocks belonging to different sub-bitstreams are differentiated according to their impacts on the quality of the picture, and the number is decided by an optimal algorithm. Simulation results show that compared with the data partitioning tool in H. 264, the proposed method is more adaptive to the change of picture content and network conditions. Together with unequal error protection, it can improve the quality of video streaming to a great extent.