基于特征的数字电视码流识别系统的实现

Implementation of Digital Television Transport Stream Identification System Based on Characteristic

基于数字电视传送流结构,提出了一种数字电视码流特征提取与识别系统的实现方案.方案采用相邻2个承载打包基本码流(PES)包头间传送包数量和填充字节数量作为特征参数,通过局域网络传输特征参数,利用显示时间标记(PTS)作为特征参数比对的同步信息,在计算机处理平台上通过软件编程实现了系统方案的基本功能.仿真测试结果表明,相对逐个比特码流比对方案,该方案更为灵活方便,可以扩大数字广播电视的监测范围.

Based on the structure of transport steam, this paper presented a transport stream identification approach with characteristic abstraction which adopts the quantity of transport stream packets and specific byte between transport stream packets loaded with the header of packed elementary stream as characteristic parameter, and uses present time stamps as synchronization of characteristic parameter, then transmits these parameters via local area network. The fundamental function of the system was realized on the computer platform finally. The simulation results demonstrate that this approach is much convenient and efficient, compared with one bit to one bit verification approach.