ASF文件格式解析及其在流媒体同步中的应用  

Analysis of ASF Format and Streaming Media Synchronization in Applications

作　　者：周舫[1] 郑逢斌[1] 刘扬[1] 魏庆[1] 

机构地区：[1]河南大学计算机与信息工程学院,河南开封475001

出　　处：《计算机工程与应用》2005年第12期98-101,共4页Computer Engineering and Applications

基　　金：河南省普通科技攻关计划项目(编号:0424220146)

摘　　要：ASF文件格式是远程教育中使用较多的流媒体格式,ASF文件逻辑上由头对象、数据对象和索引对象组成。基于对ASF文件的头对象等的深入研究,提出了ASF格式流媒体同步的解决方案,并在网络课件开发平台中得到具体实现。该方案有两个重要步骤:其一、对文件的格式进行必要的修改,在ASF文件内部加入一些控制信息和时间断点信息;其二、用JavaScript等脚本语言对媒体进行同步控制。As a streaming media format,ASF is the widely used in the distance learning.Each ASF file is composed of header object,data object and index object.In this paper,the header object of ASF format is lucubrated.On the basis of researching result,the solution for ASF format streaming media synchronization is proposed and it is realized in the platform of network courseware development.The solution is comprised of mainly two steps:firstly,the format needs to be modified by being added some control information and time break information inside the ASF file;secondly,the script language such as JavaScript is used to control multimedia synchronization.

关 键 词：网络课件 流媒体ASF 同步 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]