Much the same as the old analogue TV stations and the newer digital stations, the era of analogue CCTV security systems is coming to an end. Digital camera technology is the future of CCTV and as a result, there are two types of CCTV video recorders - NVR (the digital "Network Video Recorder" and DVR (the analogue, ironically named, "Digital Video Recorder); and two types of Cameras.

Analogue Surveillance Cameras

Analogue surveillance cameras are based on a TVL (TeleVision Lines) rating and here at iCam we offer a minimum specification of 600TVL to ensure that all of our clients receive a quality end picture. Some of the cheaper brands offer a 420TVL where a person’s face would not be recognisable at a 5 metre range. The same as the older analogue TV they utilise an RG59 coax (TV antenna cable) and have to be powered by a separate power connector.

Digital CCTV Cameras

The digital camera is based on the MP (Mega Pixel) technology that has used in phones and hand held cameras for some time now. Our cameras come in three MP settings; 1.3MP, 3MP and 5MP.

For an explanation of image quality differences, we have constructed this PDF: /assets/files/CCTV_Camera_ImageClarity.pdf

NVR vs. DVR recorders

  • DVR's utilise proprietary PC based devices containing analogue to digital capture cards.
  • NVR's utilise ‘off the shelf’ PCs with a standard Ethernet interface for receiving video and controlling PTZ devices.
  • The least expensive PC available today running as an NVR can outperform most DVR's.
  • Remote video access is accessible though the actual DVR only.
  • NVR technology allows secure, direct access to the video feeds independent of the NVR itself.
  • Multiple PCs can be loaded with NVR software for additional capability at no additional licensing cost.
  • DVR failures require the DVR manufacturer to service the unit or replace it.
  • NVR failures can be repaired or replaced by the user, PC manufacturer or retail point of purchase very quickly.
  • DVR performance is basically fixed. It cannot be easily augmented and has physical limits. Performance augmentation requires premium cost components sold by the manufacturer.
  • NVR's can be replaced and upgraded in a matter of minutes. Performance can be significantly augmented over short periods of time. This allows new technology offerings to be immediately implemented.
  • Retired NVRs are completely viable PCs which can be sold or used for other services.
  • DVR's require manufacturer approved components and accessories.
  • NVRs can implement most any device compatible with the generic PC platform.
  • DVR maximum resolution is limited by analogue camera technology and capture card design. Native analogue resolutions have approached their limits.
  • NVR maximum resolution is effectively unlimited. As camera resolutions continue to increase, NVRs can receive and decode the images without modification.
  • NVR systems support Power over Ethernet standards. This allows cameras to be cabled with a single connection each, eliminating the need for a power drop.
  • NVRs can implement multiple IP Camera devices and most any analogue camera or PTZ device simultaneously.
  • NVRs can operate via any IP network topology including low cost wireless transmission systems from most any wireless vendor.
  • NVR technology is based on multiple standards from cabling to PC operating systems.
  • Installation costs of NVR systems can be significantly lower than comparable analogue based cabling installations.
  • NVR technology has shown long term reliability in Federal prison environments, municipal, educational and most every other professional and private discipline.

Feel free to contact us for an obligate free Security System consultation on 1300 004 226