基于JMF实时传输的远程授课系统的设计与实现

Design and Implementation of Real-time Transport in Distance Teaching System Based on JMF

在简要介绍多媒体实时传输关键技术的基础上,对在JMF平台上实现音视频数据实时处理传输技术的远程授课系统的硬件结构和软件层次结构设计以及RTP流的发送和接收作了详细阐述,提出了一套从硬件到软件的完整设计和实现方案。为保证系统高度的实时性,采用了对音频和视频建立不同的虚拟信道,以负责不同媒体信息的传输,每个信道根据其媒体信息特点,赋予相应的服务质量参数,保证了信息的高效传输。

First, critical technology of multimedia real-time transport were introduced. Second, the structures of hardware and software about Distance Teaching System based on JMF which implement real-time audio and video communication technology were expounded. In the mean time, the reception and trans- mission of RTP were thoroughly discussed. Last, the scheme of the design and implementation of a whole project was put forward. In view of assuring the real-time performance of the system, different virtual channel for audio and video was built, which took charge of different multimedia information to transmit. The relative parameter was appended to the virtual channel according to what kind of information it transmited, which helped to advance the transmission efficiency of the relative information.