PID remapping concepts

Before you configure PID remapping, familiarize yourself with these terms.

Transport stream structure

• Packet ID (PID)

  A number that identifies the packets of one stream in a transport stream.

• Elementary stream

  A single video, audio, or metadata stream in a transport stream.

• Program

  A set of elementary streams that play together, such as a video stream and its audio streams.

• Program Map Table (PMT)

  The table that lists the elementary streams in a program, with their PIDs, stream types, and languages.

• Program Association Table (PAT)

  The table that lists the programs in the transport stream, and the PID of each program's PMT.

• Service Description Table (SDT)

  The table that describes the services in the transport stream, such as the service and provider names.

• Program Clock Reference (PCR)

  Timing information that receivers use to keep playback in sync. The PCR is either on a dedicated PCR PID, which carries only the PCR, or shared with an elementary stream.

PID remapping rules

• Rule

  A match expression and an action. MediaConnect checks the rules in order, and applies the first rule that matches each stream.

• Match expression

  An expression that selects streams, for example by stream type, PID, position, or language. You can combine match expressions with logical operators.

• Action

  The operation that MediaConnect applies to the streams that a match expression selects, for example keeping a stream on its PID or dropping it.

• Default action

  The action that MediaConnect applies to a stream when no rules match.