多媒体会议系统音频多点处理器的软件设计

作者：张海峰，白骋宇 日期：2010-06-28/span> 浏览：3709 查看PDF文档

多媒体会议系统音频多点处理器的软件设计
张海峰，白骋宇
（杭州电子科技大学 电子信息学院，浙江 杭州 310018）

摘要：针对多媒体会议系统的实际应用需求，归类分析了涉及到的音频信息处理策略，介绍了音频多点处理技术的原理及其对应的数据传输层和信号处理层策略，设计了一个能有效消除溢出，同时能最大可能的防止信号失真的混音算法，并最终实现了一个性能良好的音频多点处理器。研究结果表明，该处理器可以作为研究H.323多媒体会议系统的基础平台，也可作为商用多点电话会议系统的参考模型。
关键词：多媒体会议；音频；多点处理器；混音
中图分类号：TH7；TN915文献标识码：A文章编号：1001-4551(2010)06-0104-04

Software design of audio multi-point processor of
multimedia conference system

ZHANG Hai-feng, BAI Cheng-yu
(School of Electronics Information, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract: According to the practical need of multimedia conference system, audio processing strategies were categorized, audio multi-point processing principle and the corresponding strategies in data transport layer and signal processing layer were introduced. A practical audio mixing algorithm was designed, which can effectively eliminate overflow, at the same time it can be able to make the greatest possible to prevent signal distortion. Finally, a well-behaved audio multi-point processor was realized. The results show that the processor can be used in the research of the H.323 multimedia conference system and it can also be employed as a reference model of the commercial multi-point teleconference.
Key words: multimedia conference; audio; multi-point processor; mixer