SI Engines is an important part of the real-time playing system, which provides the applications with the service information (SI) support.
SI引擎是实时播放系统的重要组成部分，为其它应用提供了业务信息支持。
The service information (SI) is the data used to describe transport system, transport content and data stream time table, and also is the additional data used to complement MPEG-2 PSI.
业务信息（ SI ）是用来描述传送系统、传送内容和广播数据流时间表等的数据，是补充MPEG 2节目说明信息（ PSI）的附加数据。
With the present invention, the influence to other system information due to re-transmission of SI-1 information can be reduced.
通过本发明的上述技术方案，可以降低SI - 1消息的重发对于其他系统消息的影响。
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