# Sophia.net Signalling

When either a Private Data Descriptor or a Registration Descriptor with the value "0x534f5048" is found in any table
the following Signalling applies:

## Stream Types in PMT:

|Stream Type|Interpretation						|
|0x80		|TBS 6903-X GSE Packets				|
|0x81		|AC-3 Audio							|
|0x82		|PID only used for PCR				|

## Descriptors:

Sophia.net employs the following descriptors:

|Descriptor	|Interpretation							|
|0x80		|Encapsulated Transport Stream over MPE	|

### 0x80: Encapsulated Transport Stream over MPE
When the following conditions all apply:
	- This Descriptor is encountered in the inner loop of a PMT
	- The Stream Type is 0x0D (data broadcast)
	- A data_broadcast_id_descriptor is present
	- data_broadcast_id is 5
THEN: This PID will contain an Encapsulated Transport Stream carried within MPE Packets.

Data within this descriptor should be a human readable description of what the Encapsulated Transport Stream is, but can be left empty.


## Other Rules:

Aside from that, the following rules shall apply:

* The IRD MUST process any TDT/TOT tables, regardless of whether the Transport Stream ID and Network ID is known or not.