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The modulation of the audio depends both on the modulation used on the
encoder side, and on the decoder side. Table C.16 below lists what is
output on the decoder, in correlation to the modulator setting, and what is
sent from the encoder.
Table C.16: Audio Modulation Results
Audio source
Stereo (or joint stereo)
Dual Channel
Single Channel (mono)
The Left output and Right output columns refer to the output at the left
and right audio connector, respectively. L and R refer to the content of the
left and right audio signal present in a stereo transport stream. 1 and 2
refers to the audio signals in channel 1 and 2 respectively (the two mono
signals present in the Dual Channel audio PID), or 1 for a mono PID.
As seen from the table, Dual Channel PIDs will only provide both channels
to the user if modulation is set to transparent. This could for instance be
very useful for a two language service, where each language is sent as a
mono component in a dual channel PID. In both the stereo and mono
configurations, a dual channel PID will only provide one of the audio
channels to the users.
This channel is selected to match the Aud Lang setting set up in the TV
Service Menu (see Table C.6). If the language setting does not match any
of the two audio components in the dual channel stream, the first one will
be selected and decoded.
Table C.17: Linear Digital Audio
Input Audio Format
Musicam
AC-3
C.5.12 Input Menu
This menu is dependant on the input module fitted inside the receiver.
The input menu will be one of the types below:
ASI Input
If an ASI input card is fitted there are no setup options available.
Reference Guide: TT1222 4:2:0 Professional Receiver
ST.RE.TT1222.2
Modulator
Stereo
Left
output
L
No.1 (L)
1
No. 2 (R)
2
1
Audio 1
Linear PCM LO-RO
Linear PCM LO-RO
(If Downmix=Stereo)
or
Linear PCM LT-RT
(DownMix=LT-RT)
Mono
Right
Left
Right
output
output
output
R
L+R
L+R
1
1
1
2
2
2
1
1
1
Audio 2
Linear PCM LO-RO
Linear PCM LT-RT
Front Panel LCD Menus
Transparent
Left
Right
output
output
L
R
1
2
2
1
1
1
Page C-17
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