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DVR - Introduction
sanchita

Posts: 22

Joined: 07 Dec 2010 10:56

27 Jan 2011 12:00

DVR - Introduction

DIGITAL VIDEO RECORDER



• DVR extends as "Digital Video Recorder". There are two types of DVR: PC based and Stand Alone DVR . “MATRIX N-DVR” is standalone DVR .A New Network Video Server (NVR) is also introduced for recording IP camera(s).

• Basically a N-DVR i.e a “Network Digital Video Recorder” allows connection to an analog video camera via coaxial cable through which incoming video(analog) information is digitized, encoded and compressed which is then sent over an IP based network- LAN/WAN/Internet and recorded in system’s hard disk drive(HDD) which can be played back later on.

• Streaming of live video is possible to analog/digital(VGA) display module.

• Configuration can be done using system menu on an analog monitor directly interfaced to the system or using video management software on any PC within the network.



Benefits Of A Standalone Model :



• Easy To Install And Use ? This is due to the fact that all the software and hardware is already pre-configured . This can simplify the setup process, and eliminate potential software and hardware compatibility issues that can arise while going with the PC-based version.



• Extremely Reliable ? These DVRs are completely pre-built, tested, and functional ; so are less prone to configuration errors. In addition, standalone models function with very little interaction from the user, and can be relied on to function as designed.





Choice Of Surveillance Cameras -Wired/Wireless ?

Wired Surveillance :

Pros:

• More reliable and stable (no risk of interference)

• Less expensive in terms of maintenance and deployment

• Bandwidth available is suitable for video surveillance

Cons:

• May prove expensive in terms of cabling/installation at some places

• Less flexibility and convenience

Where as ,

Wireless Surveillance:

Pros:

• Cost effective in terms of deployment

• More flexible (boon at places where wired cameras cannot be deployed)

• More convenient (as cameras requires just a power supply)

Cons:

• Reliability and scalability problems

• Constrained bandwidth

• Signal obstruction/interference problems