Tektronix MTG100 - Manual (Page 244)

Glossary
MTG100 & MTG300 MPEG Generator User Manual
Glossary-3
NIT (Network Information Table)
One of the PSI tables described by the MPEG-2 standard and also one of the
tables defined by DVB-SI. The NIT conveys information relating to the
physical organization of the multiplex; that is, transport streams carried via a
given network and the characteristics of the network itself. Transport streams
are identified by the combination of an original network ID and a transport
stream ID in the NIT.
PAT (Program Association Table)
One of the PSI tables described in the MPEG-2 standard. The PAT provides
information about the structure of a transport stream.
PCR (Program Clock Reference)
One of the fields defined in the MPEG-2 standard. A time stamp in the
transport stream from which decoder timing is derived.
PES (Packetized Elementary Stream)
A structure defined in the MPEG-2 standard used to carry elementary
stream data.
PID (Packet IDentifier)
One of the fields described in the MPEG-2 standard. A unique integer value
used to identify elementary streams of a program in a single or multipro-
gram TS.
PMT (Program Map Table)
One of the PSI tables described by the MPEG-2 standard. The PMT
identifies and indicates the locations of the streams that make up each
service and the location of the Program Clock Reference (PCR) fields for a
service. This table is transmitted in sections.
PSI (Program Specific Information)
A set of tables described by the MPEG-2 standard. The PSI contains all of
the tables that define the MPEG-2 transport stream. It consists of the PAT,
PMT, CAT, and NIT tables. (NIT is also used for DVB-SI.)
PSIP
Program and System Information Protocol.
PTS (Presentation Time Stamp)
One of the fields described in the MPEG-2 standard. The PTS may be
present in a PES packet header that indicates the time that a presentation unit
is presented in the T-STD.
RST (Running Status Table)
One of the tables defined by DVB-SI. The RST gives a quick updating
mechanism for the status information carried in the EIT.
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