Vivotek FE9380-HV User Manual page 87

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:
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.
With the guaranteed image quality, you might still want to place a bit
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User's Manual - 87