System and method for video data multicasting

本计画研究一种新的编码视讯多播架构于都市无线网路。所提出的技术利用先进的编码技术，旨在克服臭名昭著的和固有的问题，在无线多播的情况下，即多用户信道分集和短期信道波动，通过一个综合的策略。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具有物理层叠加编码（SPC）的可伸缩视频编码被联合地实施和相互作用。所提出的技术被认为是有用的，特别是当提供大规模视频多播服务时，例如预定的IPTV，其中同时支持的频道的数量可以在有限的系统容量的情况下显著增加。

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.