基于交互式抗误码技术的H.263编解码器  

H.263 Encoder and Decoder Based on InteractiveError Resilience Technologies

作　　者：李伟[1] 刘德威[1] 涂国防[1] 

机构地区：[1]中国科学技术大学研究生院,北京100039

出　　处：《电信科学》2002年第9期20-24,共5页Telecommunications Science

摘　　要：目前,在IP分组网中进行视频图像的传输正被日益广泛地应用。但是,由于IP分组网固有的特点IP分组包丢失的现象不可避免并极大地影响了视频传输的服务质量。本文通过对一种使用连续更新来阻止差错传播（RESCU）的交互式抗误码技术进行改进,实现了一种新的交互式抗误码方法。同时,我们根据这种方法实现了一种具有良好差错恢复能力的H.263编解码器,从而改善了因分组包丢失对视频传输质量带来的影响。Now, video delivery based on IP network is being used more and more. But, since characteristics of IP network, packet loss that impairs quality of video delivery severely is inevitable. In this paper, we improve a error recovery scheme, called recovery from error spread using continuous updates (RESCU). We also implement an error resilient H.263 encoder and decoder with the RESCU. This way is effective in alleviating the error spread problem and can sustain much better video quality with video error.

关 键 词：交互式抗误码技术 H.263编解码器 数字视频 差错传播 RESCU 差错复原技术 分组网 丢包 

分 类 号：TN941.3[电子电信—信号与信息处理] TN762[电子电信—信息与通信工程]