About-network-video:
video-solution:
Related-links:
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| Application requirements: features, recording and storage needs ˇˇ |
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Application: simple remote viewing, intelligent
surveillance system with advanced event management, input/output triggers, audio
component? |
- network video products offer a wide range of network video products
with featurer
- to suit virtually any requirements. All the network cameras
provide the best image quality in its class.
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Viewing and recording needs: Determine when and how
often you need to view and record: day, night and/or weekends? Schedule the
needs for every scene. |
- Many network cameras provide two video compression formats, Motion JPEG
and
- MPEG-4, simultaneously to allow your system to optimize for image quality
and bandwidth. With limited bandwidth, you may want to view at full frame rate
or
- 25/30 frames per second (fps) with MPEG-4 and record with the best quality
- using Motion JPEG, perhaps at a lower frame rate.
- Different scenes may require different monitoring schedule, use of
triggers and
- different viewing and recording frame rate. Be realistic about when
you want to
- view and record and at how many frames per second. Keep in mind that
you will probably not want to record uninteresting video 24 hours a day.
network cameras
- also allow you to schedule the recording based on schedule,
video motion detection
- or alarm triggers.
- Event-triggered frame rate: full frame rate on all cameras at all times is
more than
- what is required for most applications. With the configuration
capabilities and built-in intelligence of the network camera/video server, frame
rates under normal conditions can be set lower, e.g. 1 to 3 fps, to dramatically
decrease bandwidth consumption.
- In the event of an alarm, i.e. if motion
detection is triggered, the recording frame rate speed can be automatically
increased to a higher frame rate.
- Applications: if you want to simply capture the identity of a person at an
entrance,
- you do not need the camera to continually send video. You can
set it up so that only when the door opens, is the camera triggered to capture
and send the necessary
- image frames. However, if you want to monitor behavior
patterns, you may want to view and record at a higher frame rate.?
- Determining your monitoring schedule will also help you assess the level of
network use and whether you'll have to install additional bandwidth capacity on
your network or whether you can make use of the same network
as for general business activities. Network traffic is generally lower during
nighttimes and weekends, which may
- coincide with when you want the network
cameras to operate. Hence, you can take advantage of the already available
bandwidth without any additional network installation.
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Calculate storage requirements: |
- Image size X frames per second?X 3600s = KB per hour? 1,000 = MB per hour
- MB per hour X hours of operation per day = MB per 24h
- MB per 24h X requested period of storage = Storage need
- (The size of an average image is about 15 KB.)
- More details
about storage as well as calculation examples.
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Calculate bandwidth requirements: |
- Image size X no. of frames per second X 8 Kbit/s = bandwidth use of one
camera in Kbit/s.
- Design Tool -
helps you determine the required bandwidth and storage capacity.
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