Security is one of the major issues in today's life. A DVR (Digital video recorder) security camera system is used to provide security. A digital video recorder (DVR) is a device that accepts analog signals from a security camera, converts it into digital format, and stores it on a hard drive (or on some other media). DVR also has a user interface to manage the captured videos. A DVR system also allows you to do setting of motion detection feature and controlling of PTZ security cameras. A DVR device used for security purpose is called as DVR security system.

A DVR security system records the video signals transmitted by a CCTV camera. These signals are then used for documentation and detection procedures. DVR security cameras transmit digital signals to a hard drive or a DVR security camera recorder. DVR security cameras have many features such as motion detection, night vision, remote access, ease of use, but the most important one is easy navigation. This feature allows you to jump to any video without rewinding or forwarding. Earlier security cameras used to transmit analog signals to a video tape recorder (VCR). Digital recording and storage definitely has advantages over analog signals.

A DVR security camera system has following advantages:

? In DVR security camera systems, recording quality is excellent. The images captured are very sharp and clear.

? Recording can be done on a hard disk so no need to buy and change the tape frequently as hard disk can store much more data in comparison to a tape.

? Automatic recording

? Low or almost no maintenance is required.

? You can record the data on a DVD, which can be erased whenever you want.

? Allows easy search of the video based on time, event or date.

With all the above mentioned advantages, a Security DVR system has some draw backs also. The draw backs are:

? Due to high compression rate, digital video occupies lot of space on the hard disk and hence the hard disk is easily filled up. There are few DVR security cameras systems, which uses motion detection feature to solve this problem to an extent. Motion detectors alert the camera for deciding the compression rate of the picture (that is when a picture with high compression is required and when with low compression).

? The other drawback with DVR systems is image distortion. Image distortion occurs, if the camera adjustment is not done properly at the time of set up.

? Output of DVR security camera systems can be a problem. Different DVR security cameras may require different software to view the file. Some DVR security cameras require codec installation to view the files. Some DVR cameras require a media player which is supported by that DVR security camera system. In some cases, DVR security camera system has its own media player and solves this problem.

DVR security camera systems are latest in surveillance technology. These cameras provide good quality pictures and videos. DVR security cameras are cost-effective. So if you are concerned about the safety of your family or business and want to safeguard your family then go for a DVR security camera system.