1
9980-CSC-3G Functional Description
1-8
9980-CSC-3G PRODUCT MANUAL
9980CSC3G-OM (V1.4)
Video Processor Description
Note:
Although the 9980-CSC models are not furnished with full audio controls
(such as input audio routing/controls), these models pass embedded audio
fully intact with no modification to four-group audio.
Frame Sync Function
This function provides for frame sync control using either one of two external
FRAME REF IN (1,2)
reference signals distributed with the card frame, input
video, or internal timing as a frame sync reference.
This function also allows horizontal and/or vertical offset to be added
between the output video and the frame sync reference.
Frame sync can select from either of two card frame reference sources, or
free-run input video sync. Selectable failover allows alternate reference
selection should the initial reference source become unavailable or invalid. In
the event of input video loss of signal, the output can be set to disable video,
go to black, go to an internal test signal generator pattern, or freeze to the last
intact frame (last frame having valid SAV and EAV codes).
An internal test signal generator provides a selection of various standard
patterns such as color bars, sweep patterns, and other technical patterns. The
test patterns can be applied to the output video upon loss of input or manually
inserted at any time. Because the frame sync/pattern generator precedes the
color corrector block, the 9980-CSC-3G can readily provide custom offset
calibrations for on-set monitor/camera colorimetry characteristics which can
be saved to yield a calibrated setting.
Color Corrector
The color corrector converts the YCbCr SDI input video to the 4:4:4 RGB
color space (where the color correction is applied), and then back to YCbCr
SDI on the output. Controls are available to adjust each RGB level
independently for both white levels (gain) and black levels (offset). Gamma
can also be independently adjusted for each RGB channels. Various controls
can be ganged to provide adjustment for all three color channels
simultaneously.
Y/C Alignment Corrector
A Y/C alignment processor provides controls for correcting upstream
misalignment of Y and C phase. Y/C misalignment is typically introduced by
upstream analog-to-digital conversion, especially where the Y and chroma
paths may experience differing characteristics.