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Cisco Video Surveillance 8020/8030 IP Camera Reference Guide
Chapter 5 Configuration
Media > Video
As the result, the lower screen is constantly displayed in high details, while the upper half is
transmitted using a lower-quality format. Although the upper half is transmitted using a lower
quality format, you still have an awareness of what is happening on the whole screen.
Figure 5-6
ROI Window
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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.
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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. On
the contrary, 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.
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Video quality—Constant bit rate:
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Constant 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.
