Cobalt Digital Inc BBG-1090-TRX-MPEG, Руководство по эксплуатации продукта

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•
Resolution: the BBG-1090-TRX-MPEG is capable of down-scaling the incoming
picture. This drop-down menu has a number of pre-defined resolutions, from 1920
×
1080
to 320
×
240. It also has two additional selections:
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:
ƒ
Resolutions must be a multiple of 16.
ƒ
The BBG-1090-TRX-MPEG 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
2
.
o
AAC-LC: transcode the input audio to AAC-LC
2
.
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.
2
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.