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Engineering wireless broadband access to IPTV

机译:工程无线宽带接入IPTV

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摘要

IPTV is now extending to wireless broadband access. If broadband video streaming is to achieve competitive quality the video stream itself must be carefully engineered to cope with challenging wireless channel conditions. This paper presents a scheme for doing this for H.264/AVC codec streaming across a WiMAX link. Packetization is an effective tool to govern error rates and, in the paper, source-coded data-partitioning serves to allocate smaller packets to more important data. A packetization strategy is insufficient in itself, as temporal error propagation should also be addressed by insertion of intra-coded data. It may be necessary to include redundant packets when channel conditions worsen. The whole should be protected by application-layer rateless coding. Therefore, the contribution of the paper is a complete scheme comprised of various protection measures aimed at robust IPTV streaming. Due to computational overheads, the scheme is aimed at the new generation of smartphones with GHz CPUs.
机译:IPTV现在正在扩展到无线宽带访问。如果宽带视频流要获得竞争质量,则视频流本身必须经过精心设计,以应对挑战性的无线信道条件。本文提出了一种用于通过WiMAX链路进行H.264 / AVC编解码器流传输的方案。数据包化是控制错误率的有效工具,并且在本文中,源代码化数据分区用于将较小的数据包分配给更重要的数据。打包策略本身是不够的,因为还应通过插入内部编码数据来解决时间错误传播。当信道条件恶化时,可能有必要包括冗余数据包。整体应通过应用层无速率编码来保护。因此,本文的贡献是一个完整的方案,其中包括针对健壮IPTV流的各种保护措施。由于计算量大,该方案针对具有GHz CPU的新一代智能手机。

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