D-Link DCS-6220, User Manual

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DCS-660 User’s Manual
D-Link Systems, Inc.
Using the DCS-660 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 0 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 100Kbps, or set Fix quality to achieve the maximum frames. The maximum frame rate
is 5 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 5 to 30.
If the images vary dramatically in your environment, you may slow down the maximum frame rate to 0
to decrease the transmitted data for better video quality. Since the human eye could not easily differentiate
between 0 and 5 or 30 frames per second, the slower frame rate will not be noticed. If your network
bandwidth is below 384 Kbps, 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 352x240/352x288 in size option for better images or 704x480/704x576
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.
Send audio from the
active client to all the
other clients:
In half duplex transmission mode, select the option to talk to the server
and broadcast your voice to all the other clients.
Improve audio quality
in low bandwidth
environment:
If the Network Camera works in versatile or low network bandwidth
environment, the User can check this option to improving audio quality
by sacrificing some real-time synchronization.
Audio source:
Acoustic echo
cancellation:
Bit rate:
Select source from external or built-in microphone.
If the Network Camera works in versatile or low network bandwidth
environment, the User can check this option to improving audio quality
by sacrificing some real-time synchronization.
There are three kinds of bit-rate for audio. 3Kbps and 4Kbps are
suitable for both music and speech like audio while 8Kbps are suitable
for only speech like audio.
Configuration > Advanced > Audio
(continued)