30/03/2017

DVR, TVR or NVR?

Do you need a DVR, a TVR or a NVR?  Or more importantly “Whats The Difference”!?!

VRs

xVRs area all just Video Recorders designed to receive the video footage captured by cameras, store and manage the images and provide a management point.  All Video Recorders can compress, record, playback and store the video footage and make the recordings available over the Internet to your Mobile device or a PC.

They come in a few different styles though as follows;

DVR

DVR is digital video recorder and it supports analogue video signal input typically over coaxial RG6 or RG59 cable. Generally local playback is via an attached monitor or TV via a VGA cable.  For CVBS ( colour video blanking sync) analog cameras the highest resolution is 960H (928*576 NTSC or 928×582 PAL) but the most common resolution is D1 (704*576).

Other than CVBS there are also standards that transmit high definition over the analog cables and this is where things can get a little confusing.  There are four competing standards for high definition over coax cable and they are Analog High Def (AHD), High Def Composite Video Interface (HD-CVI), High Def Transport Video Interface (HD-TVI) and finally High Def Serial Definition Interface (HD-SDI).  All of these HD standards will store in High Definition 1920×1080 resolution otherwise known as 1080P or 2MP.

At Perisale we no longer supply plain DVRs but rather we supply the much more flexible TVR.

TVR

A TVR is a Tribrid Video Recorder.  The “Tri” refers to the fact that this video recorder will support three different types of camera.  In the Perisale range our TVRs will record footage from old “Analog” cameras (up to 960H but including D1), HD-TVI cameras for High Definition 1920×1080 support and finally from IP cameras for maximum future proof protection.

The benefit of a TVR over a DVR is particularly obvious for customers upgrading from older systems.  With a TVR you may support older cameras that are analog and suitable for continued use without upgrade while other cameras can be upgraded to High Definition quality on existing coax cabling by just changing the cameras.  Where new cameras are to be deployed its best to cable with the new Ethernet Cat5e or Cat6 cable so in this situation you can also connect IP cameras.  With a TVR flexibility is assured.

NVR

An NVR is network video recorder.  A NVR works with IP cameras with a full compliment of functions and support for the latest technologies.  All technological advancements are now occurring with NVRs.

NVRs can support IP cameras with resolutions from QCIF to 1.3MP, 2MP, 3MP, 5MP…etc and will support multiple hard drives, storage networking and the latest compression codecs of H.264 and now H.265.

The greatest benefit of a NVR other than its future-proof nature is the ease with which networking is supported.  For Customers with multiple sites, advanced footage storage and archival needs, multi-management locations, video analytic or other advanced needs a NVR is the only choice.

NVR – MULTISITE

A NVR can be used to record footage from multiple sites.  As NVRs use IP cameras these can be located anywhere over an Intranet or the public Internet.  As typical example would be to use one NVR to record footage from and manage cameras located at both the home and your workplace.  Of course suitable network bandwidth is needed between the sites but with the NBN rollout now progressing with haste across Australia this is more possible than ever before.