System and method for video data multicasting

本课题研究了城域无线网络中编码视频组播的一种新框架。该技术利用先进的编码技术，旨在通过综合策略来克服无线组播场景中臭名昭著的固有问题，即多用户信道分集和短期信道波动。具体地，在源处具有多描述编码(MDC)的可伸缩视频编码和在信道处的物理层叠加编码(SPC)被联合练习和交互。当提供诸如预定IPTV的大规模视频多播服务时，所提出的技术被认为特别有用，其中可以在有限的系统容量的情况下显著增加同时支持的频道的数量。

This project investigates a novel framework of coded video multicast in metropolitan-area wireless networks. The proposed technology takes advantage of advanced coding techniques, aiming to overcome notorious and inherent problems in the scenario of wireless multicast, namely multi-user channel diversity and short-term channel fluctuations, through an integrated strategy. In specific, the scalable video coding with multiple description coding (MDC) at the source and physical layer superposition coding (SPC) at the channel are jointly exercised and interplayed. The proposed technology is considered useful especially when large-scale video multicasting services, such as scheduled IPTV, are provisioned, where the number of simultaneously supported channels could be significantly increased with limited system capacity.