基于PSTN的远程多媒体监控系统  

PSTN Based Remote Multimedia Surveillance System

作　　者：戴礼荣[1] 李枫[1] 王仁华[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,合肥230027

出　　处：《中国图象图形学报（A辑）》2001年第6期594-598,共5页Journal of Image and Graphics

基　　金："8 6 3"通信主题项目 (86 3-3171-96 0 4-0 3)

摘　　要：基于 PSTN网的远程多媒体监控技术 ,其关键是针对监控应用要求 ,在保证一定的图象和语音质量的同时 ,对图象与语音以尽量高的压缩率进行压缩 ,以及对图象与语音压缩进行实时处理 ;在所介绍的基于 PSTN的远程多媒体监控系统中 ,图象和语音压缩处理是采用 H.2 6 3和 G.732 .1协议 .首先介绍了该系统组成结构 ;然后在简要介绍基于 H.2 6 3和 G.732 .1协议的图象与语音压缩算法的基础上 ,进一步讨论了针对远程多媒体监控的应用要求 ,基于图象与语音压缩的若干考虑 ,着重讨论和介绍了该系统的关键组成部分 ,即多媒体远程监控终端机的设计与实现 ,提出了基于高速 DSP技术的图象与语音压缩实时处理的关键技术及所采取的措施 。In the application of remote multimedia surveillance based on PSTN(Public Switching Telephone Network), one of the key technologies is the compression of video and speech data stream at a ratio as high as possible, while the quality of the video and speech are ensured for the surveillance application; Other key technologies are such as the real time processing of the compression of video and speech data stream. The PSTN based remote multimedia surveillance system, which is introduced in the article, compresses the video data stream based on the protocol H 263 and speech data stream based on the protocol G 723 1. The article first introduces the architecture of the system. Then after a short introduction to the H 263 and G 723 1 protocols based video and speech compression algorithms, some considerations with the video and speech compression are discussed for the requirements of the remote multimedia surveillance application. Further, the design and realization of the remote surveillance terminal, which is the key part of the system, are introduced with details. Also the key technology and method of the real time processing of speech and video compression based on DSP(Digital Signal Processor) are presented. As a conclusion, the main performances of the system are reported at the end of the article.

关 键 词：图象压缩 语音压缩 数字信号处理器 PSTN 公众电话网 远程多媒体 监控系统 结构 

分 类 号：TN916[电子电信—通信与信息系统] TP37[电子电信—信息与通信工程]