PID
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Packet Identifier of a MPEG-2 Transport Stream packet.
The PID is a 13-bit number that is used by the MPEG-2 Multiplexer or MPEG-2 Demultiplexer to identify the Elementary Stream to which this TS Packet belongs. A MPEG-2 Transport Stream can thus contain up to 2^13 = 8192 multiplexed Elementary Streams.
Some PIDs are defined by the MPEG-2 Standard and the DVB Standards to be used for reserved purposes:
| PID (hex) | Purpose |
|---|---|
| 0x00 | PAT - Program Association Table |
| 0x01 | CAT - Conditional Access Table |
| 0x10 | NIT - Network Information Table |
| 0x11 | SDT - Service Description Table |
| 0x12 | EIT - Event Information Table |
| 0x13 | RST - Running Status Table |
| 0x14 | TDT - Time and Date Table |