Cobalt Digital COMPASS 9062 Up_Down_Cross Converter - Manual (Page 11)

9062-OM (V4.6) 9062 PRODUCT MANUAL 1-7
Introduction
9062 Functional Description
Video Processor Description
The 9062 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 9062 video
subsystem also provides the functions described below.
Video Processor
The 9062 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 9062 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
(frame having valid SAV and EAV codes).
Scaler Function
The scaler function provides up, down, and cross-conversions between
multiple standard SD and HD video formats, multiple frame rates, film frame
rates, and cross-conversion between interlaced and progressive formats. Table
1-1 lists the 9062 conversion choices available for various input formats and
frame rates.
When output video is set to 720p for either SD or HD video, the 720p output
can be converted to 720p half-rate formats as listed in Table 1-1. When output
video is set to 1080 film (1080p23.98) for either SD or HD inputs, the 9062
can convert the output to 1080PsF23.98 (segmented frame progressive). Both
of these functions can be independently applied to either SD and/or HD video
inputs.