Security DVR has now penetrated into many segments of industry including television, motion pictures, logistics, and surveillance and monitoring. DVR is most often used in television for pausing live television shows, go back for a few seconds, and then resume play. Another feature of DVR is that it permits you to skip commercials. One of the major advantages of DVR is the quick storage and retrieval of data. All captures images, motion pictures, and associated data gets converted into digital format for storage as well as retrieval. Since the data is in digital form, there is no loss of quality and retrieval ensures a very accurate reproduction of captured data.
DVR may be divided into two major categories. One category is platform dependent, for example the ones that are used on computers. The other category is the so-called standalone DVR that does is completely platform independent and an individual self-reliant unit in itself. Platform dependent DVR will receive data through some device, such as a camera, process that data and after converting it into information it will pass it on to whatever storage device exists on the computer. Platform dependent DVRs are relatively simple devices.
Since standalone DVRs have to perform many additional functions than data handling, they are more complicated and will typically include their own power supply, CPU, storage mechanism, and other DVR security system components. All required software is embedded on a circuit chip. While standalone systems are complicated in terms of the number of components, they are actually simpler in practical terms because of their ease of use and integral structure. The hardware and software in standalone DVR units is 100% compatible and there are no ambiguities to cause concern. The advantage of platform dependent DVR is that they can be upgraded or modified as the software matures. The use of add-on devices on platform dependent DVR also allows for greater customization where standalone units are usually available on an as-is basis. Such DVR is used in banks, retail, and transportation industries quite regularly. However, connecting them to newer hardware might result in conflicts or incompatibility.
http://www.youtube.com/watch?v=pDOM3QpkyT0
Televisions have also benefited a great deal through the use of security DVR. Using a DVR Security System makes it possible to record 4 programs at the same time as well as viewing 2 programs simultaneously. The newly advertised features like pausing live television, replay, and commercial skipping are made possible through DVR. While this technology was available through VCRs it was very limited. DVR can store almost 20 hours of television. DVR surveillance security system is being used in offices to store hundreds of hours of security data in high quality digital format while home users have more control over their entertainment.