摘要
多点控制单元(MCU)是多点视频会议系统的核心,它提供多点会议的管理和控制功能。本文主要讨论IP视频会议多点控制单元的设计和技术实现,提出并采用了MCU的多点会议控制机制、多路语音的混音处理和多画面合成等技术。采用了事件驱动的多线程机制实现音频处理和多路混音,并在压缩域实现四画面和成。
Multipoint control unit （MCU）is the kernel of multipoint videoconference system. It offers the function of management and control for multipoint conference. This paper mainly discusses the design and implementation of IP video multiconference, and presents the technologies of multipoint contrd mechanism, multichannel voice mixing and mlti - video - images composition of MCU. The paper adopts the mechanism of event - driving multi - procedure to realize voice- frequency processing and multichannel mixing, It also achieves four video images composition in the comfression field.
出处
《西安邮电学院学报》
2005年第3期60-63,103,共5页
Journal of Xi'an Institute of Posts and Telecommunications
关键词
视频会议
多点控制单元
集中型多点会议
videoconferencing
multipoint control unit
centralized multipoint conference
