4XEM IPCAMW45 - Manual (Page 15)

- 11 -
www.4XEM.com
For Best Real-time Video Images
To achieve good real-time visual effect, the network bandwidth should be large enough to allow
a transmission rate of greater than 20 image frames per second. If the broadband network is
over 1 Mbps, set the Fix bit rate to 1000Kbps or 1200Kbps, and set Fix quality at the highest
quality. The maximum frame rate is 30. If your network bandwidth is more than 512Kbps, you
can fix the bit rate according to your bandwidth and set the maximum frame rate to 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 20, 25, or 30 frames
per second. If your network bandwidth is below 512 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 160x120 in the Size option for better images. 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.