摘要： 介绍了基于天地网的视频会议系统中视音频传输模块的设计和实现。它利用RTP协议来传输视音频数据和相关的统计信息,实现了视音频数据在天网(卫星)和地网(CERNET)的互连互通,在卫星回传带宽小、双向信道不对称的条件下较好地解决了诸如延时和乱序、带宽自适应以及唇音同步等难题。

关键词: 天地互连, 视频会议, RTP协议, 带宽自适应

Abstract: This article describes the design and realization of video and audio module in video conference system based on satellite and CERNET. It transports video and audio data and relevant statistics information via RTP(real time protocol), realizes the mutual connection of video and audio data between satellite net and Internet, solves many problems such as delay and jitter, auto-adaptation to bandwidth and lip synchronization under the condition of narrow back-transfer bandwidth and asymmetry bi-direction channels.

中图分类号: 

• TN919.8