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DCS-2100 User’s Manual
D-Link Systems, Inc.
Using the DCS-2100 with an Internet Browser
Recommendations for Setting Video for the Best Performance:
“Best performance” means the image refresh rate should be the fastest possible and
the video quality should be the best possible at the lowest network bandwidth possible.
Three factors,
Maximum frame rate
,
Fix bit rate
, and
Fix quality
in the
Video
Configuration
page, are related to performance.
Recording settings for real-time motion images
To achieve a real-time visual effect, the network bandwidth should be large enough to
transmit 20 image frames per second (fps) or more. If you are on a broadband network
over 1Mbps, you can set
Fix bit Rate
to 1000Kbps or 1200Kbps, or set
Fix quality
to
achieve the maximum frames. The maximum frame rate is 25 in 50Hz system and 30 in
60Hz system. If your network bandwidth is more than 384Kbps, you can adjust
Fix bit
rate
according to your bandwidth and set the maximum frame rate of 25 to 30.
If the images vary dramatically in your environment, you may slow down the maximum
frame rate to 20 to decrease the transmitted data for better video quality. Since the
human eye could not easily differentiate between 20 and 25 or 30 frames per second,
the slower frame rate will not be noticed. If your network bandwidth is below 384Kbps,
you should adjust the bit rate according to your bandwidth and experiment to allow for
the best frame rate that can be achieved. The faster frame rate in a slow network will
blur the images. You may also try to choose
320x240
in size option for better images or
640x480
for larger image size. Because the network has burst constraints and
everyone’s environment is not the same, any poor connection will impair normal
performance.
Recording settings for clear identification for each image
To have the best video quality, you should set
Fix quality
to
detailed
or
excellent
and
tune the
Maximum frame rate
to suit
your network bandwidth. If you get some broken
pictures in a slow network, you can set
TCP protocol
in
Connection type
for a more
accurate transmission but the received images may have a lag. Note that any slow
connection with multiple users will impair performance.
Recording settings to compromise between real-time and clear images
If you have a broadband network, set
Fix quality
to
Good
image quality, or higher,
instead of setting the
Bit rate
. Otherwise, fix the bit rate according to your actual network
speed and set the frame rate to 30. If the image quality is low, select a lower frame rate
above 15. If the image quality is still not improved, select a lower bit rate.
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