GUIDE TO INSTALLATION AND OPERATION
XVP-3901 |
65
5.9.4 Dolby-E
encoder
•
Identified as MOD-DOLBY-ENC-E on the Module tab
5.9.4.1 Shuffler
Inputs
An input shuffler allows any combination of the available
channels to be used as inputs. Default is CH1 to CH8.
•
Pulldowns: Available input channels 1 to 32
The graphic shows the output channels in use.
5.9.4.2 Configuration
Encoding Mode
The operational mode can be
Dolby-E Encode
or
Pass-
through
.
Test signals at -18, -20 dBFS and silence are available for
each mode.
•
Encode
test modes will generate a test bit-stream
containing a 1 kHz sine wave for full bandwidth
channels and 100 Hz for the LFE channel of a 5.1
program.
•
In
Pass-through
test modes, it will generate a 1
kHz PCM sine wave at its outputs.
When the encoding mode changes, the output mutes and
resumes in the selected mode within one second.
In both encoding and pass-through mode, the delay through the
encoder is always one video frame.
Bit Depth
This parameter specifies the number of bits per word used in the Dolby-E bitstream. When using an output data width
of 16 bits, the available program configuration will be limited to those which require a maximum total of 6 channels.
48 kHz Pull-down
When Pull-down mode is enabled the encoder will output the Dolby-E bitstream at a sample rate of (1000/1001) * 48
kHz.
Metadata Source
Select the Metadata Path (Path 1 or 2) used for encoding. Refer to
Dolby Metadata tab
to access settings.
[Path 1, Path 2]
Reversion Mode
This parameter specifies the module’s behavior when its selected
Metadata Source
is lost or corrupted.
[Use last valid Metadata, Stop Encoding]
Note:
With version 1.1.2.0 of the Dolby-E encoder, the
Reversion Mode
is forced to
Use last valid Metadata
due
to a limitation in the module itself. The
Stop Encoding
mode will be available in future versions of the encoder.
Encoding Latency
The Dolby-E encoding latency is one (1) video frame (33 msec for 59.94 Hz formats and 40 msec for 50 Hz formats).
The encoding latency is automatically compensated (to avoid lip-sync issues) when the video additional frame delay
(
Timing
tab) is set to at least one (1) frame.
Figure 5.55
Audio Modules - Dolby E encoder
