多媒体通信的发展和应用

Development and Application of Multimedia Communication

多媒体通信是近年来发展的综合业务数字通信，它提供多种媒体的信息服务，应用领域非常广泛。本文首先简要地介绍了多媒体技术（包括多媒体通信网、多媒体计算机和多媒体信号处理），并综述多媒体信息服务和多媒体通信系统，诸如超大媒体信息系统、多媒体数据库、多媒体协调工作系统、交互式可视服务，以及多媒体邮件系统、多媒体会议系统、可视会议系统等，它们已在军事、经济、文化教育、医院、旅游及其它服务领域内实际使用。在高速铁路上引入多媒体信息和通信系统，将能有效地提高运输效率和安全性，并能提供优质服务。

Multimedia Communication is an integrated service digital communication ,which has been developed in recent years.It is the field-referring to the representation,storage,retrieval and dissemination of differ-ent information expressed in multiple media,such as text,voice,graphics,image,audio and video. In this paper, we review the applications in Multi-media Cominunication, for example the Hypertext System, Multimedia Dat-abase, Multimedia Collaborative Work System, Interactive Visul Service,and Multimedia Mailing System,Real-time Multimedia Conference Systetn,etc. These systems have been applied practically in military,economic,cultural,medical and other information serrvices.To introduce Multimedia Informa-tion Services and Communication System to high-speed railway will causetransportation more efficiency and traffic more security,llent services.Multimedia Technology,such as multimedia communication network, multimedia computer and multimedia signal processing,is briefly introduced at the beginning of this paper.