Configuring Transport Stream Information
OL-31980-01
215
Setting
Description
Input Resolution
Output Resolution
Full
1080i
1920
3/4
1080i
1440
Full
720p
1280
3/4
720p
960
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.