IPTV主要技术的发展趋势

Development Trends of Key Technologies for IPTV System

快速发展的IPTV业务成为中国信息领域的一个焦点,但经过长时间在中国多个城市的试验后其业务模型依然没有完全成熟,因此如何选择合适技术的问题成为一个短时期难以回答的问题。由于目前中国已经开展试验的IPTV业务主要是对本地的小批量用户播放电视和录像节目,采用的技术只能作为一种尝试而很难成为今后IPTV技术发展的范例,因此有必要从最终构建全国性的能满足商用运营需求的IPTV业务网络的角度出发,在全国性IPTV网络架构的设计、承载网的改造、视频编码的选择、终端的结构、内容分发网络的构建、开放DRM平台的建立和媒体资产管理系统的建设等几个主要方面开展研究。

Fast growing IPTV services have become a major concern in the information industry of China. Unfortunately, the IPTV service model has not been perfected yet after long-time trial made in a couple of Chinese cities. The question of how to select optimum technologies for IPTV is difficult to be solved in a short term. So far most trial IPTV services in China are targeted to provide a small number of local viewers with television and recorded programs. Accordingly, the technology used for the available IPTV services can hardly become a paradigm for future IPTV technology development. Therefore, with a ultimate goal of constructing a countrywide IPTV service network that can meet requirements of commercial operations, it is necessary to conduct research into design of countrywide IPTV network architecture, improvement of the bearing network, selection of video encoding technology, terminal structure, building of the content distribution network, establishment of the open Digital Rights Management （DRM） platform, and construction of media asset management system.