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VIVOTEK
- 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.
it rate control
■ B
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
from 20kbps to a maximum of 40Mbps. The bit rate then becomes the Average or
Upper bound bit rate number. The Network Camera will strive to deliver video streams
around or within the bit rate limitation you impose.
- Policy:
If Frame Rate Priority is selected, the Network Camera will try to maintain
the frame rate per second performance, while the image quality will be compromised.
If Image quality priority is selected, the Network Camera may drop some video
frames in order to maintain image quality.
Fixed quality:
On the other hand, if Fixed quality is selected, all frames are transmitted with the
same quality; bandwidth utilization is therefore unpredictable. The video quality
can be adjusted to the following settings: Medium, Standard, Good, Detailed, and
Excellent. You can also select Customize and manually enter a value.
Maximum bit rate:
a bit rate limitation to control the size of video streams for bandwidth and storage
concerns. The configurable bit rate starts from 1Mbps to 40Mbps.
The Maximum bit rate setting in the Fixed quality configuration can ensure a
reasonable and limited use of network bandwidth. For example, in low light conditions
where a Fixed quality setting is applied, video packet sizes can tremendously
increase when noises are produced with electrical gains.
You may also manually enter a bit rate number by selecting the Customized option.
66 - User's Manual
rate: select a bit rate from the pull-down menu. The bit rate ranges
With the guaranteed image quality, you might still want to place
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