作　　者： ; ;

机构地区： 广州大学物理与电子工程学院

出　　处： 《电力系统通信》 2007年第11期38-41,共4页

摘　　要： 在无QoS要求的分组交换网络中,实时多媒体传输经常遭遇传输包丢失、时延、碰撞等问题。采用基于RTP/RTCP的流媒体传输和控制机制,并在网络多媒体传输中采用一种时间戳的流媒体技术使音频和视频播放同步,可有效改善网络传输性能。文章设计的多媒体传输系统以音频线程作为主线程,通过对比音频时间戳和视频时间戳以使视频播放线程减慢、加快、保持播放速度,从而使视频的播放线程能根据音频发布的时间戳进行更新调整达到同步的目的。这种方法方便、快捷、易于实现,文章同时指出了它的不足之处。 Some problems exist during real-time multimedia transmission in non-QoS requirement packet switching network, such as packet loss, delay and collision. By adopting streaming media transmitting and controlling mechanism based on RTP/RTCP protocol and timestamp which synchronizes audio with video, the network transmission performance can be effectively improved. This paper designs a multimedia transmission system using audio line process as main line process. By comparing audio timestamp with video timestamp, the video process can be slowed down, accelerated or maintained to keep synchronization of video with audio. The method is convenient and easy to be realized. The paper also points out the shortages of this system.

关 键 词： 流媒体 协议族 时间戳 网络多媒体

领　　域： [电子电信] [电子电信]