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针对当前流媒体传输协议在无线网络中的不足,采用IIS平滑流式处理技术设计了基于服务器/客户端模式的移动流媒体系统。详细讨地论了微软的IIS平滑流式处理协议,采用该协议传输音/视频数据,搭建了基于IIS7 Web服务器的流媒体服务,设计了一款基于Windows Phone 7智能手机的流媒体播放器客户端。通过在WiFi网络环境下测试该系统,在直播和点播两种播放模式下,客户端播放的视频画面清晰流畅。通过仿真无线网络带宽的变化,验证了IIS平滑流式处理根据客户端的可用带宽实时调整传送到客户端视频流的质量的特性。
Aiming at the shortage of current streaming protocol in the wireless network, this paper designs a mobile streaming media system based on server / client mode using IIS smoothing streaming technology. Detailed discussion of Microsoft’s IIS smooth streaming protocol, the use of the agreement to transfer audio / video data, set up an IIS7 Web server-based streaming media services, designed a Windows Phone 7-based smart phone streaming media player client end. By testing the system in a WiFi network environment, the video images played by the client are clear and smooth in both live and on-demand play modes. By simulating the changes of the wireless network bandwidth, it verifies that IIS smoothing stream processing real-time adjusts the quality of the video stream delivered to the client according to the available bandwidth of the client.