视频转码技术在网络多媒体传输中的应用

视频文件数据量大、网络带宽有限,针对这一特点,提出了一种将视频文件进行转换为低码率的MPEG-4格式的文件后分帧传输的方案。在实际工程中表明基于该方案设计的采用视频转码技术的网络多媒体传输系统可以使传输效率提高5~10倍。文中重点对方案中涉及的压缩转码过程进行了讨论分析,根据分析给出了在压缩编码过程中涉及到的一些参数,并进一步指出了视频转换编码模块的灵活性。

Application of Video Code-Switching in Network Multimedia Transmission

According to the large size of video files and limited bandwidth of the network,this paper analyses the merits of the MPEG-4 files and code-switching technic,then gives an effective transmission method that is converting the multimedia files to the MPEG-4 coded files before transmission and transmits the files by frame.The practical project indicates the network multimedia transmission system using this scheme can improve the efficiency of transmission by 5 to 10 times when adopting the video code-switching technic.The paper focuses on the analysis of transcoding process,gives some parameters and points out the agility of the code-switching module.