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Setting
Full
3/4
Full
3/4
2
From the Bitrate Mode drop-down list, choose the transcode channel output
bitrate mode. You can select VBR or CBR.
3
In the Rate field, enter the HD rate that sets the transcode channel output bit rate
when HD MPEG-4/AVC to HD MPEG-2 transcoding is selected. The range is
from 8 to 25 Mb/s in 400 b/s increments.
4
From the GOP Control drop-down list, choose the Transcode Group of Pictures
(GOP) format. The options are User Gop (MN) or I Frame Sync.
5
From the User GOP drop-down list, choose the transcode manual GOP format
value. The transcoder attempts to reuse information from the encoded bit stream
to improve the video quality of the transcoded stream. Amongst others, if the
incoming GOP structure is similar to that of an MPEG-2, it will reuse the frame
allocations from the incoming stream as long as GOP Control is set to I Frame
Sync. If the downstream transcoder does not support altering GOP structures, set
the GOP Control setting to User GOP (MN). This will also require the setting of
the GOP structure which is given as two numbers, where the first is the length of
the GOP and the second is the number of B-pictures per sub-GOP. The
supported GOP structures are 1.0, 12.2, 15.2, 24.2 and 30.2.
6
From the 3:2 Pulldown drop-down list, choose Enabled or Disabled to enable or
disable the 3:2 Pulldown.
7
Click OK.
If the select channel is set to SD Output, proceed as follows:
1
In the SD Settings area, select the transcode channel SD horizontal output video
resolution from the HRes drop-down list. The parameters are 352, 480, 528, 544,
704 or 720.
2
From the Bitrate Mode drop-down list, choose the transcode channel output
bitrate mode. You can select VBR or CBR.
3
In the Rate (Mbps) field, enter the transcode channel output bit rate when HD to
SD transcoding is selected for the output channel. You can enter a range from 2
to 15 Mb/s, in 400 b/s increments.
4
From the GOP Control drop-down list, choose the Transcode Group of Pictures
(GOP) format. The options are User Gop (MN) or I Frame Sync.
OL-31980 -01
Description
Input Resolution
1080i
1080i
720p
720p
Configuring Transport Stream Information
Output Resolution
1920
1440
1280
960
215
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