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Cisco Video Surveillance 8620/8630 IP Camera Reference Guide
Chapter 5 Configuration
Media > Video
Figure 5-7
ROI Window
- Hybrid—The major difference between the “Manual” mode and the “Hybrid” mode is that in
the “Hybrid” mode, any objects entering the non-interested area will restore the video quality
of the moving objects and the area around them. The video quality of the associated
non-interested area is immediately restored to normal to cover the moving objects. In the
“Manual” mode, the non-interested area is always transmitted using a low quality format
regardless of the activities inside.
–
Quality priority—Use the slide bar to tune the quality contrast between the ROI and
non-interested areas.
The farther the slide bar button is to the right, the higher the image quality of the ROI areas. The
farther the slide bar button to the left, the higher the image quality of the non-interested area.
In this way, you may set up an ROI window as a privacy mask by covering a protected area using
an ROI window, while the remaining screen become the non-interested area. You may then
configure the non-interested area to have a high image quality, or vice versa.
You should also select the Maximum bit rate from the pull-down menu as the threshold to
contain the bandwidth consumption for both the high- and low-quality video sections in a smart
stream.
•
Bit rate control—Constrained bit rate:
A complex scene generally produces a larger file size, meaning that higher bandwidth will be needed
for data transmission. The bandwidth utilization is configurable to match a selected level, resulting
in mutable video quality performance. The bit rates are selectable at the following rates: 20Kbps,
30Kbps, 40Kbps, 50Kbps, 64Kbps, 128Kbps, 256Kbps, 512Kbps, 768Kbps, 1Mbps, 2Mbps,
3Mbps, 4Mbps, 6Mbps, 8Mbps, 10Mbps, 12Mbps, 14Mbps, ~ to 40Mbps. You can also select
Customize and manually enter a value up to 40Mbps.
–
Target quality—Select a desired quality ranging from Medium to Excellent.
–
Maximum bit rate—select a bit rate from the pull-down menu. The bit rate ranges from 20kbps
to a maximum of 40Mbps. The bit rate then becomes the Average or Upper bound bit rate
number. The camera will strive to deliver video streams around or within the bit rate limitation
you impose.
