9-7
PSI/SI Table Analysis
The “Program Specific Information” (PSI) has exactly the same structure. The PAT has a PID of zero and
begins with a table ID of zero. The PMT has the PIDs defined in the PAT as PID and has a table ID of 2. The
CAT has a PID and a table ID of 1 in each case. The PSI can be composed of one or more transport stream
packets for PAT, PMT and CAT depending on content.
Apart from the PSI tables PAT, PMT and CAT, another table, the “network information table” (NIT) is provided
in principle but not standardized in detail. It was actually implemented as part of the DVB (Digital Video
Broadcasting) project.
All tables are implemented through the mechanism of sections. There
are non-private and private sections. Non-private sections are defined in
the original MPEG-2 Systems Standard. All others are by default private.
The non-private sections include the PSI tables and the private ones
include the SI sections of DVB which are used for data broadcasting. The
header of a table contains the version number of a table and
information about the number of sections of which a table is made of.
Taking advantage of the “private section” and “private table” features,
the European DVB Group has introduced numerous additional tables intended to simplify the operation of
the set-top boxes or quite generally of the DVB receivers. Called “service information” (SI), they are defined
in ETSI Standard ETS300468. They are the following tables:
DS2831 PSI/SI analysis includes PAT, PMT, CAT, NIT Actual, SDT Actual, EIT Actual, and TDT.
The following screenshots highlight more detailed analysis information. On the left side, use the arrow keys
to move the cursor within a table, then press the rotary knob to make your selection. The cursor will then
move to the right side of the screen, where the user can then turn the rotary knob to move on to a different
level on the table.
Service Information Allocation
Table PID Value PID Decimalism Value
PAT 0x0000 0
CAT 0x0001 1
TSTD 0x0002 2
NIT 0x0010 16
SDT,BAT,ST 0x0011 17
EIT,ST 0x0012 18
RST,ST 0x0013 19
TDT,TOT,ST 0x0014 20
DIT 0x001E 30
SIT 0x001F 31
PIDs and table IDs of the PSI/SI tables
Table PID Table_ID
PAT 0x0000 0x00
PMT 0x0020…0x1FFE 0x02
CAT 0x0001 0x01
NIT 0x0010 0x40…0x41
BAT 0x0011 0x4A
SDT 0x0011 0x42, 0x46
EIT 0x0012 0x4E…0x6F
RST 0x0013 0x71
TDT 0x0014 0x70
TOT 0x0014 0x73
ST 0x0010…0x0014 0x72
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