Digital Video Recorder

What You Need to Know About Digital Video Recorders

Digital video recorders or DVR’s record videos that are in digital format to a medium. A disk drive is a sample of this medium. These digital video recorders come in the form of stand-alone set-top boxes that are connected to a monitor or television set for viewing. By connecting a digital video recorder to your video surveillance system, you can easily record the images captured by your security camera.

DVR vs. VCR

Unlike the VCR and other older methods, the digital video recorder can impress you with its wide array of functions and benefits. For one thing, you can store more video footages when you use a digital video recorder since the video is compressed onto a hard drive.

Another advantage of using a digital video recorder is having more viewing and recording options. Recording only when there is motion is most popular but scheduled and alarm recording are also available. Being able to mark the footages that you store can make it easier for you to find them later on. There’s no more need for you to go through piles of video tapes just to find the footage that you are looking for. With an IP-based digital video recorder, you also have the option of sending video feeds over the Internet allowing you to view them wherever you go. This system is usually used by BPO companies for monitoring their employees all over the world.

With a digital video recorder, you also have the option of storing the footage taken by more than one camera at the same time. You can also view more than one camera on your monitor during live or playback mode. You just need to choose a digital video recorder that has the number of channels that you need. This benefit is not available in conventional recording devices like VCR’s.

Another advantage of having a digital video recorder instead of older recording devices is that you can also command it to alert you when it detects certain security threats. Because some digital video recorders have built-in sensors that can detect movements as well as changes in the environment, you can program it to send you a notification through your e-mail in order to warn you of the event. With the help of a digital video recorder, business owners can watch over their employees even though they are far away. Even parents who are away on a business trip can make sure that their kids are safe. And, they don’t have to worry about leaving their kids to a babysitter because they can monitor her every move.

Video Compression Formats

Video compression in DVR’s is necessary since raw video takes up gigabytes of space on a hard drive. So in order to make use of limited hard drive space the video is compressed when recorded and decompressed when viewed. You’ve probably seen a number of DVR’s stating different compression formats such as MJPEG, MPEG-2, MPEG-4, Wavlet, H.263, H.264. These are different methods of compression called Codec’s, Codec is a short name for coder-decoder. When purchasing a DVR what you will mainly find is MJPEG will be used in less expensive models intended for the homeowner or individuals that may not be recording continuously. These models do a good job of compressing and decompressing the video adequately and their playback quality is good. In many cases MJPEG is all you need. However if you intend to use networking and view or record the video remotely MPEG-4 or H.264 are better choices. Their per frame size is smaller resulting in more frames per second that you can receive when viewing over the internet and they also take up less space on your hard drive. The MPEG-4 and H.264 digital video recorders will cost more but may be worth the investment in the long run.

About the Author

William M Ward is an author and technical adviser for Protection Depot, a leading online supplier of
digital video recorders
and
security cameras
. For more information about security cameras and related equipment, please visit
Protection Depot

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Dakota Alert Digital Video Recorder $69.49 Dakota Alert digital video recorder Built-in motion detector Automatically records video and audio Plug-and-play USB interface Time and date stamp Battery operated 4GB Micro-SD card (included) User friendly Technical Details Battery powered to record up to 10 days without recharging Connect to computer with included USB cord to view recordings Plug-and-play USB interface Sense motion up to 30 feet away Record video and audio

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Monsoon Multimedia Vulkano BLAST 010410VB Digital Video Recorder – 160 GB HDD – H.264, MJPEG, MPEG-2, MPEG-4, WMV, VC-1 – Secure Digital (SD) Card, MultiMediaCa $233.37 Monsoon Multimedia Vulkano BLAST 010410VB Digital Video Recorder – 160 GB HDD – H.264, MJPEG, MPEG-2, MPEG-4, WMV, VC-1 – Secure Digital (SD) Card, MultiMediaCard (MMC) – Gigabit Ethernet – HDMI – USB – Wi-Fi – Composite Video – Component Video

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L508321 8 Channel Video Network Recorder $699 The L500 Series combines advanced performance with easy operation and great value. It offers a whole new class of digital video recorders for CCTV applications. The intuitive graphic user interface and mouse navigation make the L500 easy to program and ea

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SWDVR-42600H – 4 Channel Security Recorder $339 Capable of monitoring and recording images from four cameras simultaneously, the Swann DVR4-2600 digital video recorder offers you state of the art, professional monitoring capabilities in an easy to install, easy to setup and easy to use package. You can

AVerMedia MTVUHDRFC Video Recorder – Functions: Video Recording – USB $156.39 AVerMedia MTVUHDRFC Video Recorder – Functions: Video Recording – USB

Motion-Activated Camera Recorder DVR $350 This Motion Activated Mini-Security Recorder is compatible with any camera and stores up to 10 Hours of video to a Secure Digital Memory Card. This versatile DVR gives you choices, just like full size DVRs, from Manual Record, Scheduled Record, Motion Detection Recording, and a Time and Date Stamp, all packed into one small device. The Video is stored on a portable SD Card. Video can be viewed directly from the Security Recorder using a TV or through Windows Media Player by simply removing the SD Card and placing it into your computer’s Card Reader. (Supports up to 16 GB SD cards, not included) The Motion-Activated Mini-Security Recorder Includes Motion Activated Security Recorder 2 Audio/Video Cables AC Power Adapter Manual Quick Installation Guide Size 2 1/2″ x 3 1/2″ x 1″ Please note that this device will record from nearly any DVR, but does NOT supply power.

ICD-SX25 Digital Voice Recorder $122.26 Sony’s ICD-SX25 Digital Voice Recorder stores up to 32MB on the high-capacity chip. You can transfer your recordings to your PC through the USB port. Record up to 11 hours and 35 minutes with this digital recorder!

SANYO Single Channel* Removeable HDD Digital Video Recorder $1250 Specifications Superior Horizontal Resolution of 520 TV Lines with Simultaneous Recording & Playback at 60 FPS Removable Hard Drive Capability Compact Size of 210 mm Width Five Different Picture Qualities and 27 Recording Speeds Enable Flexible Settings Audio Recording Available Series Recording Capability Instant Search with Five Different Modes Various Playback Functions Simultaneous Use with Three Recording Modes Built-in Motion Sensor CF Type II Expansion Slot Multiplexer Connectivity Built-in Control Terminal