多视点视频双向实时转码技术的设计与实现

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 本文基于拓扑排序，提出一种二维预测结构到一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 实验表明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，并通过3D视频直播实际应用验证了方法的有效性。结论 本文给出了MVC与H.264标准间进行预测参考结构映射和码流转换的机制，无需设计专用芯片就能同时兼容H.264和MVC标准。

The design and implementation of real time MVC transcoding

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 applications. Method: In this paper, a transformation mechanism was proposed based on topological sort, which mapped the 2D prediction structure of MVC to 1D reference sequence of H.264, and then used the basic coding technologies of H.264 to get MVC bit stream with syntax reconstruction. Result: The experiment results showed the method proposed could achieve real time performance for MVC-H.264 transcoding and are compatible with existing H.264 codec. Conclusion: The method proposed gave a transformation mechanism of bit streams between MVC and H.264, which need no special designed SOC.