XDS PRO1
Receiver User’s Guide
X-Digital Systems
Rev A - August 29, 2009
15
In-band ancillary data is raw asynchronous data embedded within the streaming audio on
the same program PID as the audio. It is fed into the RS232 port of the encoder port and
thereby associated with a single audio stream. MP2 natively supports ancillary data.
AAC will carry ancillary data in a proprietary enhancement to the framing protocol (this
enhancement will be compatible with all AAC decoders).
2.9.2 Out-of-Band Ancillary Data
Out-of-band ancillary data is raw asynchronous data associated with a single audio
stream but carried outside of the MP2 or AAC data frame. It is fed into the RS232 port
of the encoder port and thereby associated with a single audio stream. This data may be
embedded within the MPEG2 transport framing structure (TSP) of a single audio stream.
