RTP报文的识别与判定
首发时间:2010-12-22
摘要:随着流媒体及电话会议和视频监控等实时音视频数据传输的广泛应用,RTP(Real-time Transport Protocol,实时传输协议)得到了越来越多的应用。RTP报文一般封装在UDP(User Data Protocol,用户数据报协议)报文中。由于RTP没有对应的协议号,UDP报文头也没有信息标识载荷的协议类型,因此对RTP的识别和判定存在一定的困难。但由于RTP报文头部分信息带有某些特点和信息,这些信息为识别和判定提供了条件。本文利用RTP报文头某些特定信息的特点,结合一些判断方法,提出一种RTP识别和判定的方法。此方法应用在了一个实际的项目中,在运用中取得了很好的效果。
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Recognition and Judgement of RTP Datagram
Abstract:As the increasingly applying of stream media and real-time video and audio transportation, RTP (Real-time Transportation Protocol) is used more and more. The RTP datagram is typically encapsulated in the UDP (User Data Protocol) datagram. Since there is no corresponding protocol identifier for RTP, nor no field in UDP datagram indicating the data it carries is RTP, it is difficult to recognize and judge the protocol. However, there are some special information in fields of RTP header, which can facilitate the recognition of RTP. In this paper, combined with some methods, an algorithm is proposed to recognize and judge the RTP datagram based on those information. The algorithm is applied in a practical project and makes good sesults.
Keywords: Multimedia Communication Real-time Transport Protocol Recognition Judgement
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No.4397002557045129****
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