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Page 41 / 149 Scroll up to view Page 36 - 40
41
D-Link DCS-34±0 User Manual
Section 3 - Configuration
To fix the bandwidth utilization regardless of the video quality, choose
Fix bit rate
and select
the desired
bandwidth. The video quality may be reduced in order to send maximum frames with limited bandwidth,
especially when images change drastically. For higher video detail regardless of the bandwidth selection,
select
Fix quality
and select a video quality level. This setting will utilize more bandwidth to send the
maximum frames when images change drastically.
Vertically rotate the video.
Horizontally rotate the video. Check both
flip
and
mirror
if the DCS-3420 is to be installed upside down.
If the camera works in a multi-user environment, the user can enable this option to conserve bandwidth by
reducing video capture rate.
Select this option to display the current date and time on the video image. All the snapshots and video data
will have the date and time locate on the corner of the picture.
Video quality
control:
Flip:
Mirror:
Improve efficiency
in the multi-user
environment:
Timestamp on
video:
Page 42 / 149
4±
D-Link DCS-34±0 User Manual
Section 3 - Configuration
“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 1 Mbps, 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 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 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.
Recommendations for Setting Video for the Best Performance:
Page 43 / 149
43
D-Link DCS-34±0 User Manual
Section 3 - Configuration
Audio
There are five options to select. For all
the modes, only one client can talk to the
server at the same time.
The User can talk to and listen from the
server simnltaneously.
The User can talk to the server or listen
from the server, but not at the same
time.
The User can only talk to the server.
The User can only listen from the server.
The audio is disabled in both directions.
If the Network Camera works in a low
bandwidth network environment, the User
can check this option to improve audio quality by sacrificing some real-time synchronization.
There are three bit rates for audio. 32Kbps and 24Kbps are suitable for both music and speech and 8Kbps
is suitable for speech only.
Transmission
mode:
Full-duplex:
Half-duplex:
Simplex/Talk only:
Simplex/Listen
only:
Disable:
Improve audio
quality in low
bandwidth
environment:
Bit rate:
Page 44 / 149
44
D-Link DCS-34±0 User Manual
Section 3 - Configuration
Image Setting
From this screen you can fine tune the video image.
Image Brightness, Contrast, Saturation and Hue are all adjustable in the same manner. For each video
compensation, you can set from among eleven levels ranged from -5 to +5.
The default setting is zero for each
adjustment.
You may use the
Preview
and
Restore
button to fine-tune the image. Press the
Save
button to store the image
settings, or press the
Restore
button to recall the original settings. If settings are changed without saving, they will
be effective until the next system start-up.
Page 45 / 149
4²
D-Link DCS-34±0 User Manual
Section 3 - Configuration
Check this option to turn on the motion
detection.
The name of the motion detection
window.
Sensitivity meter allows the user to set
how sensitive for the motion triggering.
The sensitivity is based on pixel change
of the video image.
Percentage meter allows use to specify
how many percentage of the motion
screen is changed to trigger the motion
detection. Lower percentage gives higher
sensitivity of the motion detection.
Adds new windows that monitor specific
area of the image window. Up to 3 motion
detection windows can be added.
Saves the new windows settings.
Enable motion
detection:
Motion Detection
Window name:
Sensitivity:
Percentage:
New:
Save:
A green bar means the image variation is under the monitoring level, and no motion detection alert is triggered. A red
bar means the image variation is over the monitoring level and a motion detected alert is triggered. When
the bar goes red, the window that the motion is detected in will also be outlined in red (note: remember that
you can have up to 3 windows selected for motion detection). You can return to the DCS-3420 Home Page
and the monitored window will not be visible, but the red frame will show on the home page when motion is
detected.

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