流媒体技术在校园网建设中的应用

The Application of Streaming Media Technology in Campus Network

为尽可能占用较少的校园网带宽,向用户提供最佳的视频质量,更好地为远程教学服务,选用Windows Media流媒体技术,采用单播与多播服务方式,实现教学节目的点播与直播。通过采用DVCAM高质量数字视频存储格式以及广播级非线性编辑系统,既保证信号量损失最少,又实现了传统音视频技术与网络多媒体技术的完美融合。通过使用MMS协议传输ASF流,关闭Windows Media Service对ASF流的HTTP协议支持,在CBR编码中选用两次通过编码等一系列解决方案,保证了向用户提供一个可靠稳定的高质量MBR视频流。

In order to provide users with best video quality, as well as serve remote teaching in a better way, while taking up the bandwidth of Campus Network as less as possible, we plan to utilize Windows Media streaming technology, to achieve VOD and living broadcast of instructions by means of Unicast and Multicast services. Since we use DVCAM high quality digital video format and professional-level NLE system, signal loss will be limited to the lowest level, while perfectly combining traditional audiovisual technology with multimedia technology. We use MMS protocol to transmit ASF stream, turn off Windows Media Service's support for HTTP protocol, and select '2-pass encoding' for CBR encoding, and some other optimized solutions, to ensure that users can enjoy a more consistent and reliable high quality MBR video stream.