Adtec digital DTA-3050 (version 6.02.14) Manual - Manual (Page 45)

ATSC
The Advanced Television Systems Committee (ATSC) developed standards which became HDTV. Like DVB tables, ATSC
uses additional tables to function as extensions of the basic MPEG-2 system layer. Called Program and System Information
Protocol (PSIP) tables, they allow service providers to offer a multitude of broadcast products to viewers. ATSC was created
for terrestrial and cable broadcast systems.
PSIP Tables include:
Virtual Channel Table (VCT): list and defines all the channels in a transport stream, including source IDs used by
the EIT (which see) to generate the Electronic Program Guide. •
Master Guide Table (MGT): indexes other tables in the PSIP standard; defines table sizes, version numbers, and
PID values. •
System Time Table (STT): single packet that contains the current time; enables the receiver to begin events per
schedule. •
Rating Region Table (RRT): provides content-based program rating system information for countries that have
standardized ratings. •
Event Information Table (EIT): defines the events (programs) contained in the transport stream for a 3-hour block of
time; uses data from the VCT to populate the Electronic Program Guide; per ASTC, between 4 and 128 EITs must be
in the transport stream at any given time; can contain up to 16 days' worth of programming information. •
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