Surveillance Camera Installation | Northeast Remote
Surveillance is the monitoring of the activities, or other changing information, usually of people for the purpose of influencing, managing, directing, or protecting them.[This can include observation from a distance by means of electronic equipment (such as CCTV cameras), or interception of electronically transmitted information (such as Internet traffic or phone calls); and it can include simple, relatively no- or low-technology methods such as human intelligence agents and. The word surveillance comes from a French phrase for “watching over” (“sur” means “from above” and “veiller” means “to watch”), and is in contrast to more recent developments such as sousveillance. Surveillance cameras are video cameras used for the purpose of observing an area. They are often connected to a recording device or IP network, and may be watched by a security guard or law enforcement officer. Cameras and recording equipment used to be relatively expensive and required human personnel to monitor camera footage, but analysis of footage has been made easier by automated software that organizes digital video footage into a searchable database, and by video analysis software (such as VIRAT and HumanID). The amount of footage is also drastically reduced by motion sensors which only record when motion is detected. With cheaper production techniques, surveillance cameras are simple and inexpensive enough to be used in home security systems, and for everyday surveillance.
Surveillance camera systems are based on several different technologies. Legacy CCTV systems were based on technology that was utilized for many years. These early systems were limited to .3 megapixels (640×480) maximum resolution. Early analog HD was introduced as 960h and was compatible with legacy CCTV systems.960H allowed a 30% increase in resolution (960×480) and utilized both 700 TVL cameras and legacy CCTV cameras.
Serial Digital Interface (SDI) http://en.wikipedia.org/wiki/Serial_digital_interface was a technology used to provide HD resolution video surveillance over coaxial cable prior to CVI and DVI. The biggest reason it never really gained traction in the video surveillance market was because it was pricey and unlike CVI and TVI it would not accept inputs from legacy cctv cameras.
In late 2014 Hikvison and Dahua introduced new technologies TVI and CVI allowing up to 1080p resolution over coaxial cable or twisted pair with video baluns. Both options have limited IP camera addition cabilities. For more information on CVI Technology follow this link http://www.dahuasecurity.com/hdcvi/why.html. For information on TVI follow this link http://www.hikvision.com/en/us/Press-Release-details.asp?id=2688
IP video cameras tend to come in at a higher price point than the TVI and CVI offerings form china. At these higher price points you are getting a GUI that is much more user friendly and up to 7k resolution (30 megapixels) per camera capability as of this writing http://avigilon.com/press-tools/press-releases/avigilon-showcases-security-industry-s-first-7k-camera-at-isc-west-2015/.
Security integrators prefer the flexibility of the IP solutions running of video servers. The complexity of the software based systems on servers allow the integration of video, alarms, access control, building controls, Wireless Camera Deployments and Video feeds from remote locations over the internet are possible with the software based systems making them much more flexible for larger deployments.
Security Camera Installers Pa
Northeast Remote Surveillance and Alarm
Philadelphia, Pa 19106
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