Polycom VIEWSTATION EX, Руководство пользователя

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Appendix A - Screen Reference
© Polycom, Inc. 2003 309
❑
Backlight Compensation —Enable this option if your
background is too bright.
❑
Snapshot Camera
—This option lets you select the default
camera from which you want to send snapshots.
❑
Camera Direction —This option lets you set the camera to move
in the same direction as the arrows on the remote control or in
opposite directions.
❑
Primary Camera —This option lets you select the camera that is
used when you power on the system. You cannot disconnect the
main camera, but you do not have to set it as the primary
camera.
❑
High Resolution Cameras— In the High Resolution Cameras
field, you can set each of the following graphics input devices to
4CIF (a video resolution standard) by selecting its
corresponding number where:
2 = Document Camera
3 = VCR
This option is not available for the primary camera because the
higher resolution of 4CIF affects the frame rate quality.
About 4CIF
The ViewStation EXsystem supports 4CIF, a video resolution
standard defined by 704 pixels per line and 576 lines per video
image. 4CIF resolution is four times higher than CIF (352 pixels per
line and 288 lines per video image), a standard commonly
supported on video communications systems. With 4CIF, more data
is transmitted and processed, resulting in crisper images. 4CIF
should only be implemented on document cameras or VGA scan
converters and is not suggested nor supported for use in live video
mode. 4CIF only works between video communications systems
supporting this standard. If the receiving system does not support
4CIF, then the transmitting system does not send 4CIF data.