User`s manual

VPort 251 User’s Manual System Configuration
Video Quality Control
Video Quality Control is used to optimize the bandwidth of the MPEG4 video stream. There are 2
modes for video quality control.
Setting Description Default
Fixed bit rate
(Only for MPEG4)
The administrator can fix the bandwidth
to tune the video quality and FPS (frames
per second) to the optimum combination.
You may choose from the following
bandwidths: 600 Kbps, 1200 Kbps, 1800
Kbps, 2400 Kbps, 3000 Kbps, 3600
Kbps, 4200 Kbps, 4800 Kbps, and 5400
Kbps to let the VPort determine the
quality and frame rate by itself. The
combination of image quality and FPS is
determined by the bandwidth.
Fixed bit rate of 600 Kbps
Fixed Quality
The administrator can set the image
quality to one of 5 standards: Medium,
Standard, Good, Detailed, or Excellent.
The VPort will tune the bandwidth and
FPS automatically to the optimum
combination.
Excellent
NOTE
The image quality, FPS, and bandwidth are influenced significantly by network throughput,
system network bandwidth management, applications the VPort runs (such as VMD), how
complicated the image is, and the performance of your PC or notebook when displaying images.
The administrator should take into consideration all of these variations when designing the video
over IP system, and when specifying the requirements for the video system.
Camera Control
The VPort supports PTZ (PAN/TILT/ZOOM) motorized camera control via an RS-232, RS-422,
or RS-485 COM port. Before setting up camera control, the administrator should first connect the
PTZ camera to the VPort. (Please refer to Chapter 2 for the PTZ port’s wiring specifications.)
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