论文部分内容阅读
日本电气株式会社(简称NEC)于4月推出了 VOD 平台——HyperMS-Lite。该系统是由服务器端、客户端和网络连接部分做成的。服务器端主要包括编码服务器、视频服务器和管理服务器。视频服务器是 VOD 系统中的关键设备,其主要功能是向客户端提供实时的视频点播服务。服务器向客户端提供4Mbps 的视频数据流,而客户端的反馈信号仅需要几十 Kbps,这样下行需要宽带,以保证高分辨率的视频服务,另一方面上行仅需窄带,就可满足双向传输要求。用户可以选
Nippon Electric Co., Ltd. (referred to as NEC) in April launched the VOD platform - Hyperper-Lite. The system is made up of server-side, client-side and network connection parts. Server-side include coding server, video server and management server. Video server is the key equipment in VOD system, its main function is to provide clients with real-time video on demand service. The server provides 4Mbps video data stream to the client, and the client feedback signal only needs dozens of Kbps, so that the downstream needs broadband to ensure high-resolution video services. On the other hand, the uplink only needs narrowband to satisfy the bidirectional transmission requirement . Users can choose