Vivotek IP3112, Руководство пользователя

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the bit rate according to your bandwidth and set the maximum frame rate to 25 fps or
30 fps. If the images vary dramatically in your environment, you may want to slow the
maximum frame rate down to 20 fps in order to lower the rate of data transmission.
This allows for better video quality and the human eyes cannot readily detect the
differences between those of 20, 25, or 30 frames per second. If your network
bandwidth is below 384 Kbps, set the “Fix bit rate” according to your bandwidth and try
to get the best performance by fine-tuning with the “Maximum frame rate”. In a slow
network, greater frame rate results in blur images. Another work-around is to choose
“Half” in the “Size” option for better images, or “Halfx2” for a larger image view. Video
quality performance will vary somewhat due to the number of users viewing on the
network; even when the parameters have initially been finely tuned. Performance will
also suffer due to poor connectivity because of the network’s burst constraint.
Only Quality Images Will Do
To have the best video quality, you should set “Fix quality” at “Detailed” or “Excellent”
and adjust the “Maximum frame rate” to match your network’s bandwidth. If your
network is slow and you receive “broken” pictures, go to the TCP protocol in
“Connection type” and choose a more appropriate mode of transmission. The images
may suffer a time delay due to a slower connection. The delay will also increase with
added number of users.
Somewhere Between Real-time and Clear Images
If you have a broadband network, set “Fix quality” at ”Normal” or better, rather than
setting “Fix bit rate”. You can also fix the bandwidth according to your actual network
speed and adjust the frame rate. Start from 30 fps down for best results but not below
15 fps. If the image qualities are not improved, select a lower bandwidth setting.