Wholesale Surveillance

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Choosing between IP and analog security cameras is one of the first and hardest choices facing any prospective buyer of a CCTV system, whether it is for home surveillance or for monitoring a business. Both types of systems have advantages and disadvantages, and manufacturers don't try to make it easy to decide between them. There is a lot of hype and marketing buzz right now because of the growth of the industry.

Both types of cameras work through the use of CCD and CMOS chips. These chips turn visible light (and in some cases infrared light) into a signal. Analog cameras turn this signal into something that a television can see, very much like a camcorder. IP based cameras do something a little more complicated. They take the information from the chip and feed the analog signal into an encoder. This encoder is combined with an onboard web server. This allows for the camera to become a network device. This allows it to be viewed by users over an existing or new network like a web page.

Analog cameras have been around since the 1970's, starting out as vacuum tube based devices. Since then the cameras have gotten better and better. Improvements to resolutions have occurred every year. But the improvements go beyond increasing resolution. Auto-iris lens have made dealing with florescent lighting situations easier. Backlight controls have been introduced to help with bright lights coming into an area, like light streaming in through a window next to a door. Privacy masks built into PTZs can handle some of the concerns over misuse of CCTV cameras.

Analog cameras have a variety of ways of transmitting the signal, from wireless to coax, to Cat5 using different connector types. This makes long distance runs in the same building much easier since you can use the right and most cost effective cable for each run. The variety of cable types can be both confusing and useful at the same time. Cat5 works for very short runs that are less than 250 ft. Professional grade baluns can be run up to 2500 ft.

IP cameras grew from the humble web cameras. The idea behind them was to move some of intelligence from the DVR to the camera itself. Many of the current IP cameras have their own built in motion detection. This allows some cameras to record to SD cards inside the camera itself, offering a layer of redundancy. Other features include adding an analog output to the camera so that it can become a bridge between an analog system and an IP based system.

IP cameras can be connected to a network by either wireless transmissions or by Cat5. Through the use of switches/hubs/and routers the Cat5 can be extended almost indefinitely. The use of IP cameras can require the installation of new RJ-45 jacks. Existing jacks generally are not well placed to secure the camera's connections. Some IP cameras are hybrid in nature, allowing for both network and analog connections. Toshiba's line of IP cameras generally has this feature.

Analog Pros:

1. Cost: Analog cameras generally have a better price to performance ratio then IP.
2. Flexibility of design: There are many varies of camera types, from small covert cameras to large PTZs to indoor domes with IR. This can make fulfilling certain goals easier by using a camera designed for your needs.
3. Compatibility: Analog cameras put out either NTSC or PAL signals. In North America, almost any camera you buy will be NTSC. This makes it easy to use existing cameras, or mix and match vendors for equipment.
4. Maturity: Many of the teething problems have been worked out. Things like privacy masks (blacking out an area for privacy on a PTZ) and back light compensation exist from lesions learned in the past.

Analog Cons:

1. Analog cameras don't have some of the features like built in digital zoom that IP have, except at the highest price points.
2. Wireless Analog cameras have problems with interference and are unencrypted. Anyone can view the signal.
3. Analog cameras can be harder to deal with over long distances.

IP Pros:

1. Better wireless support: Analog wireless has more problems with interference then network based cameras. The 802.11x standards have encryption built into them.
2. IP cameras can take advantage of already existing wiring.
3. Adding one or two cameras at a remote site can be easier.

IP Cons:

1. High bandwidth use: It varies by camera but 500kbps to 1.5 Mbps is a common range.
2. Cost: Because of the cost of the hardware that is moved onto the camera, IP cameras cost more then comparable analog cameras.
3. Vendor lock-in: Many third part applications support more then one type of camera but most vendors only support their cameras. Given that not all brands support all features, it can make selecting the right brand hard unless you turn to a third party.

It is important to assess your situation and evaluate both options, not only for your current needs, but for expansion possibilities in the future as well.

For more information on Analog Security Cameras, please visit www.liquidcctv.com

Make CCTV Equipment brings the Sense of Security to your Whole Family

There are a large number of different types of CCTV Surveillance system equipment at ePathJ.com - the alone website for Surveillance system. Here David cc from ePathChina will provides information about the different types available. If you don't have any security in the home or in the office at the moment, then you should consider purchasing some. The Product is so various, however - motion sensors, alarms, even employing a security guard but none of these are as effective as the use of CCTV equipment and cameras. Review this you will find out how to make CCTV equipment brings the sense of secutiy to your whole family.

In the modern era, unfortunately crime happens everyday. The truth is that unless you are adequately secure and protected you are likely to become a target yourself. Vigilance is very important when it comes to security and that means ensuring windows are locked overnight, the locks are well functioning and the locks into the building are completely secure. It is also very sensible to go one step further and purchase some security equipment of some description.

Burglar alarms are a popular choice. Working with motion sensors an alarm rings when the perimeter of the house is crossed. They are not always completely effective however. They can be triggered by a cat or they can sometimes go off even because of the wind. Human error comes into play too and sometimes the alarm can be forgotten or not set in the first place. All these scenarios lead to either the alarm sounding when it is not supposed to or it not going off at all. Often a burglar alarm is linked to a nearby security firm who will send someone out if the alarm goes off. This can take some time however by which time the crime has already been carried out.

It is far better to buy CCTV equipment of some kind. The cameras themselves come in a range of styles and budgets. Hidden, Wireless Camera Sets can be placed wherever you want. These are good because they don't have large amounts of wire and can be hidden in all sorts of places. Large, obvious cameras are also available. These are often favoured in public buildings and large office blocks. Cameras act as effective deterrents and the bigger is often the better for this purpose. The larger the camera the clearer the picture tends to be so anyone considering breaking the law will almost definitely think twice about it if there is a large, ominous camera in place. Domed CCTV cameras are another common occurrence. These are good because they are very discreet and it is impossible to know where they are pointing. This makes them a good choice in places with large numbers of people and also for outside the home.

Another type of popular CCTV camera is a Video Door entry phone. These work particularly well for elderly people living alone who don't want to open the door to strangers. A camera points to the front step and the person inside can clearly see who is standing there. It is also possible for identification to be viewed through the video phone. When the person is satisfied they know who is ringing the door bell (Video Door Phones) the door can be opened. These also work well in blocks of flats and are often found here.

It is very important that some type of security equipment is installed in the home and in the place of work. In the past CCTV was viewed as something to be used only by the rich and famous, however these days many people turn to cameras for their security. The price is a lot less than it once was and they work very effectively too. CCTV equipment and CCTV camera kits work well to capture images and to act as a deterrent. Video door entry is a form of CCTV equipment that works well to bring additional security into the home.

EPATHJ.COM Online Store Focuses on Surveillance & Security Equipments Wholesaling, Provides More Than 500 kinds of Surveillance & Spy Products, Is Your Best Partner in Securiry  Business.

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About the Author

David cc - An author from ePathChina.com - Wholesale surveillance equipment, access control system, spy device, home security systems, surveillance cctv cameras, complete surveillance system, CCTV surveillance system, cheap surveillance systems, wholesale cctv systems, Security Systems, CCTV Cables, Portable CCTV Testers

can you record from a camera onto a video ipod if you have the right cables etc?

I want to connect a CCTV type camera to my ipod and record onto it. Is this possible? And if so, will I be able to then download the videos onto my computer?

Nope.
Ipod is just a storage drive and they do not have the software to record onto it. Without a doubt that will be coming soon though.

Monday, March 22, 2010
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