GUIDE TO INSTALLATION AND OPERATION
XVP-3901 |
59
The output channels of the above modules are always fixed and depend only on the module socket number in which it
is inserted. The outputs for module 1 will always be in the range 17 to 24. The output for module 2 will always be in
the range 25 to 32. Refer to the table below for a quick overview of the output channels versus the installed modules
and their module position:
Installed Module
Output channels when in Module #1
Output channels when in Module #2
MOD-DOLBY-DEC 17-24
25-32
MOD-LA-DUP-701 17-22
25-30
MOD-DOLBY-ENC-D 17-18
25-26
MOD-DOLBY-ENC-E 17-18
25-26
MOD-LA-ALC-X-YYY 17-24
(depending on number of channels) 25-32 (depending on number of channels)
MOD-JA-ALC-X-YYY
17-24 (depending on number of channels) 25-32 (depending on number of channels)
It must be noted that the MOD-LA-DUP-701 has only 6 outputs and the MOD-DOLBY-ENC-D/E has only 2 outputs. In
these cases, only the first 6 or 2 channels are used. The MOD-LA-ALC-X-YYY and MOD-JA-ALC-X-YYY modules
may have from 2 to 8 outputs depending on the model used.
The processing delay for all MOD-LA-ALC-X-YYY and MOD-JA-ALC-X-YYY modules is ¼ of a video frame. To
compensate for this processing delay, the user must increase the processing delay of the card by +1 frame.
This additional processing delay must be added manually in the Video Output page under the Timing tab.
5.9.1 Dolby E and Dolby Digital (AC-3) Decoder
•
Identified as MOD-DOLBY-DEC on the module tab.
The decoder supports Dolby-E, Dolby Digital or PCM signals. Any other non-PCM signal will be lost through the
decoder module; its outputs will be muted.
For a Dolby-E input signal, the decoder outputs a metadata
bitstream which may be used by the audio processing and
the audio modules, embedded in the 3G/HD and SD outputs,
or sent to the RS-422(B) output. See the Dolby Metadata
tab.
A selector is provided at the Decoder input, but the output
channels of the Decoder are routed to the internal channels
17 to 24 (i.e. Module #1) or to channels 25-32 (i.e. Module
#2), with a mapping related to the input Program
Configuration and Coding Mode.
5.9.1.1 Control
tab
The
Bitstream Detection Mode
dictates the action taken by
the decoder for each type of input bitstream.
In
Auto
mode, the decoder automatically recognizes and
decodes PCM, Dolby Digital or Dolby-E input bitstreams. If
Dolby-E only
is selected, the decoder recognizes and
decodes only Dolby-E bitstreams; otherwise the decoder
outputs are muted. The same behavior applies for the
Dolby
Digital only
selection. If
Mute (OFF
) is selected, all outputs
are muted for any type of input bitstreams; the Mute mode
disables the Dolby decoder.
Figure 5.49
Audio Modules - Dolby Decoder control
