C2-8000 S
ERIES
O
PERATION
M
ANUAL
86
Because the video pixel rate has to be doubled in order to fit twice as many frames
in during the same amount of time, only resolutions that are of low enough pixel
rate can be doubled and still be within the DVI / HDMI pixel rate limit. These are:
Frame rates available
720p 3D
50Hz
59.94Hz
60Hz
Resolution
1080p 3D
23.98Hz 24Hz
25Hz
In the above, the normal 74.25MHz pixel rate is doubled to 148.5MHz in order to
handle 3D Frame packing of left / right images. These resolutions have been
added to the CORIO2 resolution database.
For example, the 1280x720p 60Hz 3D resolution is actually composed of a single
frame of 1470 active lines (plus another 30 for the vertical sync area). The Left 720
lines are placed at the top, followed by 30 lines of blank lines (but no vertical sync),
then the other Right 720 lines.
Similarly, 1080p 24Hz 3D is composed of 2205 active lines (plus another 45 for the
vertical synd). Each Left / Right frame is 1080 lines long, with a blanking area in
the middle of 45 lines.
11.3
Scaling of 3D resolutions using a single CORIO2 scaler
To the CORIO2 unit, the new 3D Frame-packed resolutions (720p 3D & 1080p 3D)
are just larger than usual images with some blanking area in the middle. Hence,
they can be scaled to different resolutions with no problem – and will retain the
blanking area in the middle.
If they are scaled to another 3D resolution (e.g. 1080p 3D to 720p 3D), this blanking
area will remain in the correct place for Frame packing. Hence, a single scaler can
support such a conversion. However, 1080p 3D frame-rate conversion (e.g. 1080p
23.98Hz 3D to 1080p 25Hz 3D) will suffer from reduced vertical resolution, since
the total numbers of lines including the blanking area will be beyond the scaler’s
2048 line limit.
The following table shows what scaling can be achieved using a single CORIO2
scaler:
Frame
packed
Right
Frame
packed
Left
Frame
packed
Right
Frame
packed
Left
Scale whole
image at
once
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