摘要
讨论了基于实时传输协议(RTP)传输的多媒体信息的还原方法,以及不依赖于RTP协议传输的多媒体信息的还原方法.还原基于RTP协议传输的多媒体信息需先对网络数据包进行捕获和分析,然后对所捕获的RTP网络数据进行重排序,最后利用AVI和WAV技术提取出视频和音频数据.对于不依赖于RTP协议传输的多媒体信息的还原,着重讨论了对采用WMV3和ML20编码的多媒体信息的还原方法.为满足透明性处理要求,提出了一种集三种不同信息还原方法为一体的开放式多媒体信息还原框架.实验结果表明,采用该方法可以成功还原出大部分常用的网络多媒体信息.
In order to ensure the sound development of Internet, the extraction of multimedia information was described which was transmitted by RTP （real-time transportation protocol） and other protocols. The extraction of multimedia information which transmitted by RTP involves several important problems, such as capturing and analyzing network packages, reordering the out-of-order RTP packages, and extracting video/audio information by AVI（audio video interleave）/WAV（wave） technology. As the extraction of multimedia information that not depends on RTP, the extraction of information encoded by WMV3 and ML20 standard was discussed. To meet the transparent requirement, this paper introduces an opening framework for multimedia information extraction which integrates three different multimedia information extraction methods. The experiment result shows that most common network multimedia information could be successfully extracted by the methods which are introduced.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第9期101-103,113,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
关键词
多媒体信息还原
实时传输协议
音视频交错文件
波形声音文件
multimedia information extraction
real-time transportation protocol
audio video interleave file
wave file
