Digital Video Recorder (DVR) For Security
Digital Video Recorder (DVR) For Security
A Digital Video Recorder (DVR) offeres a superior way of processing a Video signal, as opposed to older methods which utilize analog techniques. The method of storage being the main difference where Video tape is replaced by a Digital Storage Device such as Flash memory, or a Hard Disk Drive. Digital data transfer is not as prone to the effects of noise, crosstalk, or signal coupling issues.
Once a Video Image consisting of single or multiple frames has been stored it is extremely easy to modify or add effects to. In a lot of cases a Personal Computer (PC) is involved in the storage and image modification process. The digital information (Digitized from incoming Video) usually originated from a PCI board which is plugged into the PC’s internal backplane, or simpler yet, via the USB (Universal Serial Bus) port.
(Video Digitizers) that plug into the computers USB port are often in the form of a small dongle. Some versions provide Composite Video, S-Video, and Stereo Audio inputs while others provide multiple Composite Video inputs. The later, is more suitable for Security Camera applications where Composite Video is still the accepted standard.
These devices also have the advantage of being able to rob their power supply ( 5VDC) from the USB port that they are plugged into.
There are some advantages to digitizing S-Video (the ‘S’ stands for Separate) over a Composite Video Signal. S-Video consists of Separate channels for the Luminance (Y) and Chrominance (C) Video components (both are in time synchronism). The Luminance signal conveys the brightness component of the image (like Composite Video without any Color component) while the Chrominance component is simply the Color information. As both S-Video channels are separated, there are no crosstalk issues and detrimental Bandwidth limitations due to low pass filtering. Due to these characteristics, S-Video offers improved image reproduction.
For Security and Night Vision Applications a reliable method of recording events is paramount. Use of a DVR PCI Card often provides a superior solution for time lapse image capture, and date and time stamping requirements. Also, due to advances in technology, it is often the most cost effective solution to recording Video images over long periods of time without image degradation.
kevin is espow friendly partner and a friend like espow hope espow also make more like partners, thanks.
Article from articlesbase.com
Lorex LIVE SD9 Wireless Digital Security System – LW2902ULTRA-DIGITAL WIRELESS TECHNOLOGY FOR EXCELLENT VIDEO & AUDIO QUALITY; 9″ LCD WITH BUILT-IN WIRELESS RECEIVER & SECURE DIGITAL CAR…
Oregon Scientific ATC 5K Waterproof Action Cam Flash Memory Video Recorder with 1.5-Inch Color LCD Screen, Still Image and Web Cam Capabilities (Blue)Dirt, Snow, Rain, or Shine, capture all the action with the ultimate, all-terrain digital video camera! It’s even WATERPROOF up to…
Zoom H4n Handy Portable Digital Recorder DVD Video Training Manual TutorialLearning how to use your newZoom H4n has never been easier thanks to ProAudioDVD.com’s H4n DVD Tutorial!Representing the next leve…
Sony ICD-BX800 2 GB Flash Memory Digital Voice Recorder (Silver)Don’t miss a word with the ultra-portable ICD-BX800 digital voice recorder. The BX800 has made recording easier than ever with Voi…
Dazzle Video Creator Plus HDEverything you need to edit HD home movies. With Dazzle Video Creator Plus HD, anyone can produce great looking HD movies – no pri…
Digital Video Recorders: DVRs Changing TV and Advertising ForeverFour specific trends are driving the DVR industry: consumer content choice, consumer content control, personalization of content l…
Vivitar HD Camcorder (DVR528R-TA) with 32MB Internal Storage – Red5.1 Megapixels, Built-In Microphone, Built-In Speaker…
eyespypro.com Upgraded Spy Pen Digital Video Recorder now has 640 x 480, is Apple computer compatible, records in 3gp, and has great audio, and it has a time & date stamp that really works. We can’t get this one anymore, so try the sexy black dvr spy pen. Find out more info on the DVR Spy Pen at
Video Rating: 4 / 5
