A Digital Video Recorder (DVR) is a peripheral device that records information to a variety of storage devices (internal or external hard drive, USB port, a CD or DVD, etc.), digitally, from many sources. Some DVRs only record video but most will record both video and audio as well as other information (such as alarm functions). A DVR provides many advanced functions over the older standard - the VCR. These functions include video searches by an event, the specific time, a specific date and by each individual camera.
With a DVR there are many different video quality and frame rate options so that the user can optimize the disk space for their specific needs. DVRs can be set to automatically overwrite the oldest footage on the disk when the disk becomes full so that recording does not cease just because the internal hard drive has no more space. Most new-model DVRs will also allow the user to set up remote access to the security footage that can be called up over a web browser from any PC. Software packages are starting to come put now that even allows users to call up their DVRs right on their cell phones.
An NVR, on the other hand, is a Network Video Recorder which is hooked up directly to a network and is totally IP based. NVRs are extremely flexible since they are managed remotely over a LAN and they can simultaneously record and allow access to live video streams from the IP cameras connected to it. NVRs usually feature recording and playback capabilities, intelligent motion detection, P/T/Z camera control and a user-friendly GUI.
A NVR has some similarities to a DVR, but those similarities are limited to the fact that they both record and playback video. An NVR is a true digital system. NVRs receive digital images/video/audio over the network and record them digitally to a hard drive; while DVRs can accommodate both digital and analog cameras.
NVRs are becoming the more popular storage device because they can accommodate a larger number of cameras, they are easily integrated into existing systems, and they are incredibly flexible since they have no dedicated monitors or keyboards and all management and viewing takes place over the network on a PC.
WTI offers a wide variety of both NVRs and DVRs – check out our selection online at http://www.gotowti.com/Products_DVRs.htm or take a look at our entire line of solutions at http://www.gotowti.com/Products_Main.htm.
~The WTI Team
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WTI (Wireless Technology, Inc.)
Video Surveillance Products Dedicated to the Broadcast, Global Security and Transportation Markets!
www.gotowti.com ● www.wirelesstech.com
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