Cobalt Digital COMPASS 9061 Up_Down_Cross Converter - Manual (Page 11)

9061-OM (V4.9) 9061 PRODUCT MANUAL 1-7
Introduction
9061 Functional Description
Video Processor Description
The 9061 features a scaler that provides up, down, and cross-conversion using
de-interlacing and motion adaptation for high quality up-conversions. The
scaler also provides user-adjustable aspect ratio control and zoom control.
Separate controls are provided for SD and HD inputs that allow the card to
flexibly and independently handle mixed input formats.
The 9061 video subsystem also provides the functions described below.
Video Processor
The 9061 provides full color processing control (luma gain and lift, chroma
saturation, and color phase) of the output video.
Frame Sync Function
This function provides for frame sync control using either one of two external
EXT REF IN (1,2) reference signals distributed with the card frame, or the input
video 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.
A video/audio delay offset function allows adding or reducing audio delay
from the matching video delay. This function is useful for correcting lip sync
problems when video and audio paths in the chain experience differing
overall delays. A Reset Framesync function resets the frame sync following
any horizontal or vertical offset changes, clearing any buffered audio and
video and re-establishing the frame sync. The 9061 re-establishes video/audio
sync following framesync changes by applying an offset in small, progressive
amounts to provide a seamless, glitch-free retiming. A user-selectable hard
resync function allows setting a threshold at which hard resync is applied if
audio-video offset exceeds a selectable threshold. Hard resync provides
fastest snyc-up suitable for off-air manipulation. Conversely, a threshold
setting that avoids hard resync allows glitch-free on-air manipulation.
In the event of input video loss of signal, this function provides for disabling
the video, going to a desired color raster, or freezing to the last intact frame
(for SDI, last frame having valid SAV and EAV codes; for analog, last frame
free of timing errors).