Secondly, it analyses function and date of the PSI system, and makes its data model.

而后又对其进行了功能设计和数据分析，并建立了数据模型。

youdao

Chapter 2 describes the system part of MPEG-2 standard with focuses on PSI (Program Specific Information) and PCR (Program Clock Reference).

第二章主要讲述了MPEG - 2标准系统层规范，着重介绍节目特殊信息PSI和节目时钟参考pcr。

youdao

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。

youdao