Range Analog
2009
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Range Analog
Simplicity of analog with benefits of IP
As you know, analog cameras are simpler to use than IP (Internet Protocol) cameras. Maybe they are not simpler but they are more common because of the precedence of appearance. Now, IP network cameras meet the same requirements of analog cameras and even surpass them with their additional features and characteristics. Besides, IP cameras are invading the market of network cameras in a tremendous and faster way than the analog cameras do; the thing which shows the wide acceptance of IP cameras.
Analog cameras or analog as a technology is numb or even static; it lacks the required performance and flexibility of our digital lives. For instance, IP camera systems are more intelligent than traditional systems because they can not only handle a limited number of cameras, but they can also handle thousands of cameras such as the traditional or the analog ones which use DVRs; the more cameras you use, the more you need DVRs systems. IP cameras have a large scale of built in features which are not available in analog cameras.
When we distinguish between IP and analog, it will be a great help if we know some of the major differences between them. Therefore, these are the main critical and various aspects between both;
- Resolution: IP Network technology can provide a high resolution quality up to 15 times more than the quality analog video has. The latest cameras can now process video up to 3Mbitp/s, but Analog cameras cannot provide resolution above television standards, which corresponds to 0.4 mega-pixels at 4CIF. Many analog systems run at a much lower resolution due to technical and cost restrictions, operating at 0.01 mega pixels.
- Power: Powering an analog camera can be costly and difficult. Firstly coaxial cable must be installed to transport the video then power cabling feed to each camera. Network cameras can be run from the Power over Ethernet (PoE) standard, which means that cameras can be run over the same cable that transmits data and power.
- Wireless: one of the clear advantages of IP cameras is the flexibility to integrate with a wireless network; however, analog cameras, which use radio frequencies to transmit video wirelessly, are limited to about a dozen cameras before it reaches capacity in the unlicensed spectrum.
- Installation: IP cameras require some basic networking skills for small installations and significantly more technical skills for as enterprise size installations. However; analog camera requires you to know little about network and configuration issues, just power, point and focus, regardless the scope and size of overall system.
- Intelligence: IP technology allows cameras to have much higher range of ‘built in' features. For example; cameras can be programmed to record only on movement, vastly reducing network load. Other features include sun and backlight compensation, dual lenses technology, internal digital storage, audio and SIP telephony.
- Interlacing: an IP camera can progressively scan moving objects more clearly. There are no separate interlaced lines, so this method provides much clearer image. Analog technology even at (4CIF) has a significant problem with interlacing: causing moving objects to blur.
After these differences, you can see that IP Cameras have more advantages than the traditional Analog cameras. Small amount of users use IP Network cameras but more and more are planning to upgrade their systems. At the end of the day, you would find that IP based system including cameras, cables and recordings, is less expensive than analog.
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How to create switchable analog bandstop filter?
Hello, I have an Electrical Engineering question for you. Does anyone know how to create a switchable analog bandstop filter? I have two signals, 60Hz and ~120kHz and I want to be able to filter the 120kHz signal with no attenuation at the 60Hz range. It needs to be switchable. Also, if several of these are cascaded in parallel, they cannot have any loading on each other either with resistances or with induced capacitances. I have been looking at parallel resonant circuits, but I think I need something a little more complicated, cause they will be subject to loading. Any help is appreciated. Thanks!
Its going to be difficult to build a bandstop filter to remove 60Hz and not 120hz. I would recommend instead you build a second order high pass circuit to remove the 60Hz.
If you use op amps you will get a response from your filter ( if you have enough knowledge to ask this question you can probibly draw up the transfer response fairly well )
Op amps have a low input impedance and a high output impedance, so they dont get loaded down, and can put out power really well.
If you need further help google "op amp high pass filter"
Tonerider AD-1 Analog Delay Pedal Demo
