Digital Video Recorder

Digital video recorder are the backend support devices of the CCTV system. DVRs have recording capabilites with control over quality and frame rate. This allows optimization of the available disk space for long time recording. DVR also overwrites the oldest data in the disk when the disk is full to allow for continous uninterrupted recording..

for small-scale the analog cameras are particularly useful so as to reduce the overall cost of the setup. analog camera's quality is measured in tv lines named as TVL. the range of tvl cameras is from 600 tvl to 800 tvl. these cameras are useful in small areas such as homes, small apartments, small stores etc,.

Types of DVRs

• 1)Standalone Digital Video Recorder. It has 4,8,16,24 and 32 channel digital video recorder.
• PC Based DVR It has 4,8,16,24 and 32 channel windows based Digital Video Recorders.

Standalone DVR is the most popular and most used in the market, PC Based DVR is rarely used.