Christie CP4230 User Manual page 90

Section 6: Projector Menus
Control
3: 3D Sync Input Mode
4: L/R Display Reference
5: Frame Rate N:M
6: L/R Display Sequence
7: 3D Sync Polarity
8: Dark Time
9: Output Delay
10: Phase Delay
FRAME RATE N:M NOTES
These N:M ratios define how many frames to display per number of frames that form
one complete image. For all 3D use, the denominator is 2, indicating that 2 frames
(left and right) are combined into every complete display frame. For non-3D, it is 1
frame. Set it to the highest rate possible without image cropping.
6-22
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Description
Specifies whether a specific frame of input data has left eye or right eye data.
Use GPI (polarity = true) or (polarity = inverted): Select if you are using a single 3D signal
requiring a separate 3D stereo sync input at the GPIO.
Use Selected Input Port (polarity = true) or (polarity = inverted): Select if your 3D source
provides separate left and right data via 2 cables at the HD-SDI A and HD-SDI B SMPTE
ports. This assumes the 3D stereo sync signal is included with the image data inputs rather
than supplied separately at the GPIO port.
Use White Line Code (true and inverted): Select only if using a single 3D input signal in
which an embedded white line at the bottom of each frame identifies left vs. right, and an
additional separate 3D stereo sync input at the GPIO port is not present. The bottom row of
the left-eye sub-field should be pure white for the left-most 25% of the pixel row and pure
black for the remainder of the row. The bottom row of the right-eye sub-field should be
pure white for the left-most 75% of the pixel row and pure black for the remainder of the
row.
Use Line Interleave: For use with 3D source data only. When specified, the TI system will
de-interleave each line into the left image or right image in memory as specified. Line
interleave can be used with PsF 3D data (left and right data for one field, then left and right
data for second field).
Specifies which frame of eye data to display during a specific display frame. This signal is
referenced to the display frame rate which is specified by the Frame Rate N:M.
Sets how many frames to display per number of frames that form one complete image.
Increase the display frame rate to reduce flicker from your source(s).
Defines the frame order (L-R or R-L) required for 3D perspective. This option only has
meaning when the Frame Rate factor M is equal to 2. For this case, 2 input frames of data
are required to constitute a complete frame of image data. This parameter tells the system
which frames go together to make a complete image. NOTE: When using Line Interleave
as the 3D Sync Input Mode, ensure that Left (L1R1 L2R2) is selected.
Keeps 3D stereo sync output the same as input (true) or reversed (inverted).
True: 3D L/R sync output from GPO will match L/R sync input.
Inverted: 3D L/R sync output from GPO will be the opposite of sync input (left = right,
right = left).
Creates a blank time interval between left and right frames to allow for LCD shutter
glasses, Z screen, or rotating 3D wheel to synchronize the output. See Dark Time and
Output Delay Notes below. Values between 0 and 65535 are accepted. Tap the Launch
Dialog button to enter the dark time value.
The non-image time in Microseconds (μ). Offset 3D stereo sync output in relation to dark
time interval. Acceptable values are between -32768 and 32767 are accepted where a
positive offset = delay and negative offset = start early. Tap Launch Dialog to enter the
output delay value.
The degree of reference between the left and right sync output. Values between -180 and
180 are accepted. Tap Launch Dialog to enter the phase delay value.
EXAMPLE
4:2 = 4 frames displayed
2 frames per image
CP4230 User Manual
020-100621-02 Rev. 1 (1-2012)