DVB-S2 GS流的分析与提取方法

随着卫星技术与互联网技术的进一步融合，通过数字广播电视（DVB．s）信道传输的业务种类大幅增加。第一代系统难以应付快速增长的IP数据业务，为此，第二代数字卫星广播标准（DVB—s2）制定一种新的码流：一般传输流（Gs）。针对现有卫星设备缺乏对GS流处理的现状，根据基带帧自身的格式、GS流在基带帧中的编排方式及GS流专用封装一般传输流封装（GSE）的特点，提出一种DVB—s2GS流分析与提取的方法，对基带帧的封装方式及GS流的封装GSE进行分析，并用实际数据进行测试。实验结果证明，该方法能够快速准确地还原出应用层中的IP数据，实现对GS流的处理。

Analysis and Extractin~ Method for DVB-S2 GS

Along with the combination of satellite and Intemet technology, business lines transmitted by satellite Digital Video Broadcasting-Satellite（DVB-S） channel increases rapidly. The first generation system can not meet the need of the fast increasing IP business, hence, an entirely new Generic Stream（GS） is introduced in DVB-S2 standard. Aiming at the problem that the existing satellite terminal equipment can not process GS very well, this paper presents a DVB-S2 GS extraction and analysis method according to the form of generic stream, the arrangement method of GS in base-band frame and feature of Generic Stream Encapsulation（GSE）. It analyses the encapsulation mode of base-band frame and GSE of GS, and tests some actual data. Experimental result shows the method can restore IP data in application layer rapidly and accurately, and can realize the processing of GS.