Crystal Vision
Introduction
ShARC-XPUserManualR2.11
3
21/09/05
1 Introduction
The ShARC102-XP is a single channel, broadcast quality, 10 bit serial digital video aspect
ratio converter. The ShARC204-XP is a dual 10 bit serial digital video aspect ratio
converter permitting 24 independent channels in a 2U frame. The module can be controlled
locally from the card edge or by frame active front panel. Remote control is possible using
Crystal Vision’s active control panel REMIND, or Statesman PC Control Software. The
GPI port can also be used for 442 control or simple switching, providing a final method of
remote use.
Dedicating the image processing to these conversions allows a higher quality output
compared with multi-purpose ARCs. The result is low levels of aliasing and banding
coupled with a wide frequency response. No vertical processing is employed so the
propagation delay is minimised.
Two main operational modes are available for each channel: convert mode and bypass
mode. In each convert mode, two conversion types are available.
One stretches horizontally the central 75% of the input image to the full width of the output
picture monitor. This permits a 16:9 input to be displayed correctly on a 4:3 picture
monitor. The second conversion squashes horizontally the entire input image to 75% of its
size and puts this in the centre of the output image with black bands down the sides. This
permits a 4:3 input to be displayed correctly on a 16:9 picture monitor.
ShARC-XP conversions