LevelOne FCS-1070 User Manual page 19

quality. The maximum frame rate is 25 fps in a 50Hz system and 30 fps in a 60Hz system. If your
network bandwidth is more than 384Kbps, you can fix the bit rate according to your bandwidth
and set the maximum frame rate to 25 fps or 30 fps. If you are shooting fast-moving images, 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.
In multi-user environment, the user who has poor network performance will receive only the key
frame in MPEG4 format. Try to reduce the key frame interval can improve the frame rate for
poor network performance, but the penalty is the increasing of network traffic. If the server is
running on the Internet, select the "improve efficiency in the multi-user environment" will improve
the efficiency in the multi-user environment.
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 HTTP protocol in "Connection type" and choose a more
appropriate mode of transmission. The images may suffer a time delay due to a slower
connection.
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.
Select for Motion JPEG
The Network Camera is a camera with dual video codec, they're MPEG4 and MJPEG. If MJPEG
is selected, the camera will transmit video data in JPEG format. Therefore, it requires higher
bandwidth to view smooth video. General speaking, each normal sized JPEG image would be
3k~12k bytes, depending on the selected video quality and contents. Together with the frame
rate selected, the administrator can control the bandwidth of each connection.