摘要
分组丢失是IP交换网络常见的现象。该文针对下一代网络多媒体通信,提出了一套IP网络抗分组丢失的方案。包括纠删编码、打包和发送以及接收端错误掩盖。与常见的纠删编码相比,该文提出的[9,5,3]码具有构造简单,编解码时间短,纠删能力高的优点。打包和发送方案根据[9,5,3]码的纠删性能对视频数据打包,并以一定顺序发送,提高了纠删码抗突发错误的能力。采用新的视频编码方案H.264所提供的抗误码工具——灵活的宏块次序(FMO),对纠删失效的视频数据在解码端进行错误掩盖。
It is very common that the packets may be lost over IP networks during transmission. The scheme proposed in this paper involves a novel erasure correcting code, a packet sending order and error concealment method. The [9,5,3] erasure correcting code in this paper has excellent lost recovering capability, linear encoding and decoding time and is easily constructed. The packetization method increases the capability of error resilience against the burst packet loss. The error concealment tool FMO of H.264 is used to deal with the video information packet that can not be recovered.
出处
《电子与信息学报》
EI
CSCD
北大核心
2006年第10期1879-1882,共4页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61072030)
华为科技基金资助课题
关键词
视频通信
分组丢失
纠删码
H.264
灵活的宏块次序
Video communications, Packet loss, Erasure codes, H.264, Flexible Macroblock Order（FMO）
