Table Functions (MPEG)
PAT (Program Association Table)
- provides the link between the transport_stream_id, the program_number and the program_map_id (PMT).
PMT (Program Map Table)
- when pointed to from the PAT, the PMT provides the associated group of elements (video, audio etc) with the program_number.
CAT (Conditional Access Table)
- provides the association between CA system(s) and their EMM (Entitlement Management Messages) streams and any special parameters associated with them.