Posts Tagged ‘ wireless surveillance camera’



Wireless Home Security Cameras and Monitors

Written By:
Wednesday, August 18th, 2010

Providing your own home security in the form of digital video camera systems is becoming one of the most popular methods of residential security and monitoring. In addition, wireless home security cameras and monitors are become increasingly popular as well because of their versatility in application, ease of installation and operation, and reasonable pricing that makes them affordable for almost any budget.

What is the difference between “wired” and wireless home security cameras and monitors? Basically, “wired” digital video home security cameras use some sort of cable, usually an RG-59 coaxial cable to transmit their video signals to the monitors and/or Digital Video Recorders or DVRs. This cable is similar to the same cable used by most cable television companies. Although professional installers normally mount the cameras and run the cables using the least obvious arrangements, some homeowners may find the cables a bit too obtrusive, especially if they install the cameras themselves and use a different method.

Visibility of the cable isn’t the only reason for using wireless home security cameras and monitors. Sometimes it may be necessary to mount digital video security cameras in locations that may be difficult to provide cable to or in areas that are so far apart that it is easier to use a wireless system instead. For example, many complete home camera systems are used in rural homes that may contain lots of acreage and additional detached buildings such as garages, shops, or barns. If these buildings are located a significant distance from the home, cabling may seem impractical so a wire home security digital video camera is used instead.

One specific application of wireless security cameras and monitors is when they are used as baby monitors. Wireless digital video cameras can provide you with the peace of mind of monitoring your baby 24/7 and make great baby monitors. The digital video camera that is used for this purpose is usually a wireless night vision infrared camera and monitor system.

Infrared cameras used as wireless home security cameras and monitors, especially as baby monitors, are extremely popular and useful. The camera contains one of two special electronic sensor chips, known as a Charged Coupled Device or CCD or a Complimentary Metal Oxide Semiconductor or CMOS. These chips are sensitive to infrared radiation in the near infrared spectrum. This infrared radiation or “light” can be seen by the sensor chip (and therefore the camera) but cannot be seen by human eyes. That’s why infrared digital video cameras make great baby cams!

Infrared wireless home security cameras normally have an array of infrared Light Emitting Diodes or LEDs that surround the camera lens or are located somewhere near the camera lens and are pointed in the same direction. These LEDs bathe the target area with infrared light (in this case a baby crib for example) but this light does not disturb the baby because the baby cannot see it.

Often times these baby monitor systems are wireless home security cameras and monitors. The signal is sent using by the camera using radio waves to the monitor. Since the monitor is not connected by any type of cable it can be conveniently moved from room to room to maintain surveillance of the baby.

Remember, wireless home security cameras and monitors are not restricted to use as baby monitors only. These cameras and monitors are great for many different types of applications where a wireless camera and monitor would by useful.

Wireless home security cameras can be purchased with almost any feature or additional option that is available for their “wired” counterparts. Some of these features include: cameras for outdoor use or indoor use; cameras that can record audio as well as video; cameras that have Pan-Tilt-Zoom or PTZ functions to increase their field of view; day/night vision cameras; several different camera types or shapes such as box, bullet, and dome cameras; and even cameras that can be networked using the internet (called Internet Protocol ready or IP ready cameras).

If you are considering the purchase of wireless home security cameras and monitors, talk to one of our security experts today. They can help you determine what components or system best suits your needs and budget. You can contact our security experts by using either our live chat feature or by calling the toll free number: 866-573-8878 Monday thru Friday from 9AM to 6PM EST.

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Wireless Surveillance Camera with DVR Systems

Written By:
Thursday, July 8th, 2010

Some of the most popular security surveillance systems are the wireless security camera with DVR systems. It’s not hard to understand why these systems are in demand. They are simple and quick to install, they are a complete standalone system with great versatility that lends them to almost any application, and they are affordably priced.

A typical wireless security camera with DVR system has the following components:

  • • One to several wireless digital video cameras;
  • • A wireless receiver unit;
  • • A processor/Digital Video Recorder (DVR) with a CODEC utility, and;
  • • A monitor for viewing live or recorded video.

While this is the basic configuration, many wireless security cameras with DVR systems may vary from one component to another to accommodate each individual user’s application needs. That’s one reason why these systems are so popular; they can adapt to almost any situation.

Basic wireless security camera with DVR systems work by sending their video images via radio waves. The wireless digital video camera captures the video image and converts it into an electronic signal. The electronic signal is converted into a radio signal and is sent to the receiver using the wireless camera’s built in transmitter and antenna. Most modern wireless systems use the 2.4 GHz or 5.8 GHz radio band technology (the same technology used with wireless home telephones). The receiver accepts the transmitted video signal in radio form and converts it back into an electronic signal. It then passes it on to the processor/DVR.

The processor converts the electronic signal into a digital video file. Digital video files are actually several digital photographs taken in succession in a small amount of time. Typically, high quality video files will contain about 30 photographs or frames per second. This can cause the size of the digital video file to be extremely large in a relatively short period of time (e.g. in just minutes). The processor uses software or hardware called a CODEC utility (an acronym for COmpression/DECompression) to make the file size smaller and easier to handle without sacrificing quality. The file is then displayed on the monitor for live viewing and also saved on the DVR for archiving or for later use.

Wireless surveillance cameras are the key components to the versatility of a wireless surveillance camera with DVR systems. The cameras can be categorized into indoor and outdoor types.

Outdoor cameras are just like indoor cameras except the cameras are built inside a cover or case. The cameras are usually rated as to the amount of protection the case provides from foreign objects getting inside and reaching the camera parts. This rating is an International Electrical code standard called an Ingress Protection rating or IP code. A rating of IP66 or IP67 is satisfactory for most outdoor applications. Both ratings indicate that the camera is free from dust entering it and IP66 means it is protected from powerful water jets while IP67 means it can be submerged in up to 1 meter of water.

The wireless security cameras used with wireless security camera with DVR systems can be used in a variety of lighting conditions. There are highly specialized cameras for many different lighting conditions. The two main types of specialized cameras are the day/night vision wireless camera and the night vision infrared wireless camera.

The cameras use and electronic sensor chip to create the video image. There are two different types of sensor chip each with its own set of advantages and disadvantages. One type is the Charged Coupled Device or CCD and the other is a Complimentary Metal Oxide Semiconductor or CMOS.

Day/night vision cameras have chips that are incredibly sensitive to small amounts of light and can therefore produce high quality color video in very low light conditions. However, they cannot produce a video image in total darkness; they must have some visible light.

Night vision infrared (IR) wireless cameras produce a high quality color video when there is sufficient visible light. When there is not enough visible light or in conditions of total darkness, these cameras can produce a high quality black and white or monochromatic video image using infrared light.

There are other options available for wireless security cameras used with a DVR system. These include recording audio, Pan-Tilt-Zoom (PTZ), and networking capability using the internet.

What ever your situation requires, there’s bound to be a wireless surveillance camera with DVR system for you. These systems are quick and easy to install and economically priced.

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