【摘要】 实时网页通信(WebRTC)无需在网页上安装插件或客户端即可实现实时视音频通信,具有跨平台、开发成本低和适用范围广等优点,已被W3C纳为草案,正在带来多媒体通信的一场革命。首先介绍基于WebRTC实时视音频通信的总体架构;接着详细阐述其相关关键技术,包括信令机制、网页应用和浏览器底层WebRTC,后者还包括视、音频编译码模块和传输模块;然后从两用户和多用户的角度对WebRTC实时视音频通信应用的实现细节进行比较;最后讨论值得进一步研究的开放问题。更多还原

【Abstract】 WebRTC(Web real-time communication)can achieve real-time video and audio communication on the Web without installation of any plugin or client software.It is accepted as W3 Cdraft,because of low development cost and wide application range.WebRTC is bringing us an innovation era on multimedia communications.The overall framework of WebRTC-based real-time video and audio communication was introduced first,and then the related key technologies of WebRTC were elaborated,including signaling mechanism,Web app and WebRTC of low layer of browser.The latter also includes video codec module,audio codec module and transmission module.Next,implementation details of WebRTC real-time video and audio communication applications were compared from the point of view of two users and multiple users.Finally,open issues that are worthy of further study were discussed.更多还原