问题：
What is DVB-SI?
答案：
DVB-SI stands for digital video broadcasting - service information, including:
a) Information carried in a DVB multiplex describing the contents of different multiplexes. Includes NIT, SDT, EIT, TDT, BAT, RST, and ST.
b) The DVB-SI adds the information that enables DVB-IRDs to automatically tune to particular services and allows services to be grouped into categories with relevant schedule information (ETS 300 468)
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