56
o
Same as Input:
this will cause the output resolution to be the same as the input
resolution.
o
Custom Resolution:
this setting allows for an arbitrary resolution, other than the
pre-defined set. If this is selected, new fields appear as shown below:
Arbitrary horizontal and vertical resolutions can be entered, with the following
constraints:
Resolutions must be a multiple of 16.
The MVN-XC440 will never output a resolution that is higher than the
input resolution.
Audio Compression:
The following selections are available:
o
Input Pass-Through:
do not transcode the audio, pass it unmodified to the output.
o
MPEG-1 Layer II:
transcode the input audio to MPEG-1 Layer II
3
.
o
AAC-LC:
transcode the input audio to AAC-LC
3
.
If
MPEG-1 Layer II
or
AAC-LC
is selected, the
Audio Bit Rate
field is displayed
where the desired audio bit rate can be entered. For MPEG-1 Layer II, this is a drop-
down menu with the valid selections; for AAC-LC any bit rate between 64 kb/s and 384
kb/s can be entered.
Pass Second Audio:
if this box is checked, a secondary audio PID is passed though the
transcoder if present. Secondary audio can only be passed from input to output;
transcoding is not available.
Program Name:
this setting controls how the program name is handled through the
transcoder. The options are:
3
An optional license is required to transcode an incoming Dolby AC-3 audio stream into MPEG-1 Layer II or AAC-
LC (see the Admin License Keys Tab section). If the incoming stream is Dolby AC-3 and a license is not available,
the audio will revert to Input Pass-Through regardless of this selection.