多视点视频双向实时转码技术的设计与实现  

The design and implementation of real time MVC transcoding

作　　者：孙立峰[1] 蔡飞飞[1] 杨士强[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《中国图象图形学报》2014年第4期645-648,共4页Journal of Image and Graphics

基　　金：国家重点基础研究发展计划(973)基金项目(2011CB302206);国家自然科学基金项目(61272231)

摘　　要：目的多视点视频编码标准MVC是国际标准组织针对3D视频制定的编码标准,支持实时编码和兼容已有H.264标准是MVC应用推广迫切需要解决的问题。方法基于拓扑排序,提出一种2维预测结构到1维参考序列的映射变换机制,利用已有的H.264编码单元技术,实现了MVC-H.264双向实时转码。结果该方法能够兼容现有的H.264编解码器,支持高清MVC实时编码。通过3D视频直播实际应用验证了方法的有效性。结论本文MVC与H.264标准间的预测参考结构映射和码流转换机制,无需设计专用芯片就能同时兼容H.264和MVC标准。Objective The MVC standard, as an extension of H. 264 standard, provides a standardized codec reference for 3D videos. Real time encoding and keeping compatible with H. 264 are key problems for deploying MVC in 3D applica- tions. Method In this paper, a transformation mechanism is proposed based on topological sort, which maps the 2D predic- tion structure of MVC to 1D reference sequence of H. 264, and then uses the basic coding technologies of H. 264 to get MVC hit stream with syntax reconstruction. Result The experiment results show the proposed method could achieve real time performance for MVC-H. 264 transcoding and are compatible with existing H. 264 codec. Conclusion The proposed method gives transformation mechanism of bit streams between MVC and H. 264, which need no special designed SOC.

关 键 词：H 264 多视点视频编码 转码 并行编码 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]