Posts Tagged ‘ Digital Video Recorders’



Home Security Gate Camera

Written By:
Tuesday, January 4th, 2011

A home security gate camera can alert to you to approaching visitors long before they reach your door, prevent unwanted and unnecessary solicitors and assist in providing gate access control.

Home owners often start their residential digital video camera security system with a single home security gate camera. However, after using this camera for a while and realizing the potential security and monitoring power of a digital video camera, they usually return to purchase an entire digital video security system for the house and residential property. This is easy to do as there are systems that easily support up to four, eight, or even sixteen individual cameras.

A home security gate camera used in tandem with a remote electronic gate lock and opener can provide you with security guard “like” control of your property’s entrance. This can be accomplished by using a digital video security camera with audio capturing technology (or an intercom) and either a wired or wireless electric gate lock and opener.

When a visitor arrives at the gate entrance, the user can look at the security system monitor to see the individual’s face and/or the vehicle they are driving. Once the home owner has identified the visitor, they can press the remote gate lock and opener button to allow the individual to enter the property.

For individuals with large homes on abundant land and long driveways, this feature is particularly useful for controlling access to the residence. Some may want to modify the system a bit and use a two-way intercom so that a conversation can take place between the user and a visitor if need be.

There are some features available that you may want to consider before purchasing your home security gate camera. First and foremost, the camera must be an outdoor type camera. These cameras are specifically made with an enclosure or case that provides protection from the weather and elements. These cameras often utilize the International Electrotechnical Commission’s Ingress Protection or International Protection (IP) code.

The IP code consists of two digits, with the first digit representing protection from solids and the second digit representing protection from liquids; the higher the number of each digit the better the protection. The ranges of digits are 0-6 for the first digit and 0-8 for the second digit. An outdoor camera with a rating of IP55 or greater should work fine.

If you want a camera that can capture images ’round the clock (24/7), you may want to consider providing flood lighting at the gate for night time monitoring. However, a cheaper and much easier alternative is to use a home security gate camera that has infrared night vision.

Night vision infrared cameras work both in daylight and in darkness. The camera is sensitive to near infrared spectrum radiation “light.” The infrared light is provided by on-board infrared producing Light Emitting Diodes or LEDs. These LEDs are normally arranged in an array around the camera lens so that they provide a floodlight of infrared illumination in the camera’s field of view. This light is invisible to the human eye, but visible to the camera.

If you are interested in monitoring more area than just the gate or visitor, you may also want to consider a Pan-Tilt-Zoom (PTZ) camera. These cameras can be remotely controlled by the homeowner to move horizontally or vertically to increase the camera’s field of view. Images can be enlarged by using the zoom function. Many DVRs (Digital Video Recorders) have programming that can automatically control PTZ cameras to track or follow objects.

Whether you have the security system installed by a professional or are installing it yourself, you may also want to consider a wireless, battery operated camera. Digital video cameras require that an RG-59 type coaxial video transmission cable be run from each camera to the DVR unit (or monitor if no DVR is used). In addition, each camera needs a low-voltage DC wire run to it for a power supply. A wireless, battery operated camera eliminates the need for any cabling and makes installation a snap.

There are a lot of choices for someone looking to purchase a home security gate camera. Today’s technological advancements have yielded a large variety of optional features that have made home security gate cameras even more powerful, providing the protection you need.

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CCTV Digital Video Recorder

Written By:
Wednesday, November 10th, 2010

A closed circuit television or CCTV digital video recorder can provide the security and/or surveillance you need for your home, office, business, or industrial setting. For residential applications, a CCTV digital video recorder can protect your home and give you the peace of mind even when you are away of knowing that things are secure. For commercial applications, nothing provides cost effective security and surveillance as well as documentation than a CCTV digital video recorder.

What exactly is a CCTV digital video recorder? A CCTV digital video recorder is any device that can save and store digital video data, usually in the form of a digital video file that can be retrieved, copied, and played back through a monitor at some later time.

Security and surveillance type cameras first got the name Closed Circuit Television or CCTV to differentiate them from television cameras. The original security and surveillance type video camera was basically just a smaller version of the video camera television studios used to record television shows such as variety shows, sitcoms, dramas, and news reports. Television cameras were attached to transmitters that broadcast the signal over vast areas so that anyone with a television (in essence a receiver and monitor) could monitor the signal.

CCTV was used in reference to video cameras that were each connected to a video recorder. Each camera has a video transmission cable, usually a coaxial type RG-59 cable, which runs from the camera to the recording unit and monitor. The only way to receive the camera’s signal was to be in a closed circuit with it via the video transmission cable. Since these cameras didn’t broadcast their video signals publicly, they were called Closed Circuit Television or CCTV.

Today, CCTV is used a little more loosely, too mean a designated system of cameras, receivers, and recorders not intended for public broadcasting. For example, individual digital video cameras today can transmit their video signals via radio signals to receivers or Digital Video Recorders or DVRs. Although it may be possible for someone to intercept the signal, it is not intended for public broadcasting and in effect, is a closed circuit type of television.

In the security camera industry, a CCTV digital video recorder is usually thought of as one of three integral components in a digital video security system. The other two are the digital video camera(s) and an LCD monitor. For residential or commercial standalone digital video CCTV systems, the DVR is basically the equivalent of a personal computer hard disk drive connected to a high specialized type of computer processor called a Digital Signal Processor or DSP.

On these units, the CCTV digital video recorder unit is still connected to each individual camera in the system; however, as mentioned earlier they may now be connected by a specific radio signal transmission. The DSP interprets the digital data sent to it by each digital video camera and then creates a digital video file. Unprocessed digital video files can become extremely large in a very short period of recording time, so the DSP usually applies some sort of COmpression/DECompression or CODEC utility. This CODEC utility processed the digital data in such a way as to greatly reduce the size of the file while still maintaining high video quality.

Standalone CCTV digital video recorders do not require any additional equipment (such as a computer) for processing or storing the video, hence the name “standalone.” The actual DVR is the same sort of device used for a personal computer’s hard disk drive. As a result, the benefits of advanced computer technology and storage features have been passed on from the computer industry to the security camera industry in regard to the DVR.

These standalone CCTV DVRs today normally have storage capacities that range from 250 gigabytes to over 1 Terabyte. This coupled with modern CODEC utilities this translates to longer periods between overwrites when a disk becomes full and even greater capacity to store multiple cameras at once.

In addition to magnetic disk drives, CCTV digital video recorders may be in other formats as well. Although the hard disk drive is probably the fastest, cost-effective method for storing standalone system digital video, small portable units are becoming popular as well. These units may use any of the portable memory card media (such as Compact Flash, SD, etc.) or even Flash Thumb drives as the storage media of choice.

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Child Room Infrared Camera

Written By:
Thursday, July 22nd, 2010

Nothing can give new parents the sense of comfort and peace of mind like a child room infrared camera. Innovative technology in the security camera field has produced high-tech cameras with sophisticated features for a variety of uses while maintaining affordable prices. Child room infrared cameras are not only great for use with newborns and infants but with toddlers and all young children. They also work great as nanny cams to help you monitor your child your child’s care giver while you are away.

A child room infrared camera system can be set up in a variety of ways but there are two methods that are most often used. The first is simply as a monitoring camera that allows you to view in real-time (live), video images of your child’s room. This method is often used as a day/night baby or child room monitor.

When using this method there are basically two pieces of equipment that are required; an infrared camera and a monitor. The camera is simply mounted in the child’s room normally in a corner or other vantage point that will yield the greatest field of view. If used as a nighttime child monitor it is normally mounted in a place that provides a field of view that encompasses the bed, crib or other sleeping area

Modern digital video cameras create digital video images using one of two sensors. Either a Charged Coupled Device or CCD or a Complimentary Metal Oxide Semiconductor or CMOS is used. Both of these devices convert the light focused on them by the lens into electrical energy that is then converted into a digital video image.

One nice feature about these sensors is that they are inherently sensitive to infrared radiation in the near infrared spectrum. That means they can be excellent candidates for making infrared video cameras. They do this by illuminating their target area with infrared light; light which is invisible to the human eye but easily seen by the sensor. This light is normally created by an array of several infrared Light Emitting Diodes or LEDs that either surround the camera lens or are next to it so the light is aimed in the same direction as the lens.

These cameras can be set up in the child’s room with the monitor in another area of the house that is convenient for the parents. A coaxial transmission cable may be used to transmit the video camera’s images to the monitor. However there are also wireless child room infrared cameras.

Wireless child room infrared cameras can transmit their video images using the 2.4 or 5.8 GHz radio band frequency. They contain a built-in transmitter and antenna that they use to send the signal to a corresponding receiver. The receiver is then connected to the monitor, or in some cases, the receiver and monitor may all be in one unit. This system is incredibly easy to setup and install. Just mount the camera and plug it into a power source. Plug in the receiver and monitor and connect the two together and away you go.

There’s even a simpler and possibly more convenient wireless option. New IP (Internet Protocol) ready wireless child room infrared cameras contain their own server. This means if you have a broadband internet connection, you can simply connect the IP camera to the internet and use any computer anywhere in the world there is internet access to monitor the child’s room. This amazing versatile feature allows parents to use child room infrared cameras not only as night time monitors, but as daytime “nanny cams” as well and they can be easily monitored from any computer with an internet connection and a web browser, like Internet Explorer.

The second method which is also frequently used, employs the same basic equipment above, but in addition to monitoring the system creates a digital video file and actually records the video footage for later viewing or archiving. These child room infrared camera systems have Digital Video Recorders or DVRs that store the digital video file. Some systems allow you to use your own personal computer to store the files instead.

Whichever method you choose, a child room infrared camera has the versatility to be used in most all situations and can provide 24/7 monitoring that gives you peace of mind that your child is safe and well. In addition these systems are very reasonable priced so as to be affordable on almost any budget.

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