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> DVR VS NVR( Newstime:2011-6-25 )
Digital recorders are divided into two principal categories: Digital Video Recorders (or DVRs) and Network Video Recorders (or NVRs). These names are a little confusing because both DVRs and NVRs use digital recording, and DVRs are often connected to networks.
The difference is in the way that the cameras are connected to the recorder. In principle, with a DVR, the cameras are usually analogue types linked to the recorder by ordinary coaxial cables. With an NVR, however, the cameras are linked to the recorder by network connections.
In practice, many modern DVRs are hybrid types that can work with both analogue and networked cameras. It`s also worth noting that it`s perfectly possible to use analogue cameras with a true NVR, provided that the cameras are fitted with
network interface modules. For delivering live and recorded pictures to one or more monitoring stations and for handling control functions, many DVRs and all NVRs can use a network connection.
As networked installations, at least in theory, offer lower installation costs and enhanced flexibility, the current trend is for systems to be increasingly designed around NVRs rather than DVRs. In fact, for the largest systems there may be little option, as DVRs are typically only available with up to 32 camera inputs, whereas NVRs can be configured to handle a much larger number of cameras.
However, because of their versatility, their convenience in small installations and their ability to interface more easily with legacy equipment, DVRs are sure to be around for a long while to come.
The difference is in the way that the cameras are connected to the recorder. In principle, with a DVR, the cameras are usually analogue types linked to the recorder by ordinary coaxial cables. With an NVR, however, the cameras are linked to the recorder by network connections.
In practice, many modern DVRs are hybrid types that can work with both analogue and networked cameras. It`s also worth noting that it`s perfectly possible to use analogue cameras with a true NVR, provided that the cameras are fitted with
network interface modules. For delivering live and recorded pictures to one or more monitoring stations and for handling control functions, many DVRs and all NVRs can use a network connection.
As networked installations, at least in theory, offer lower installation costs and enhanced flexibility, the current trend is for systems to be increasingly designed around NVRs rather than DVRs. In fact, for the largest systems there may be little option, as DVRs are typically only available with up to 32 camera inputs, whereas NVRs can be configured to handle a much larger number of cameras.
However, because of their versatility, their convenience in small installations and their ability to interface more easily with legacy equipment, DVRs are sure to be around for a long while to come.
