DVR vs NVR Comparison
DVRs utilize proprietary PC based devices containing analog to digital capture cards.
NVRs utilize ‘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 DVRs.
Remote video access is accessible thru 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 can not be easily augmented and has physical limits. Performance augmentation requires premium cost components sold by the manufacturer.
NVRs 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.
DVRs require manufacturer approved components and accessories.
NVRs can implement most any device compatible with the generic PC platform.
DVR maximum resolution is limited by analog camera technology and capture card design. Native analog 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 analog 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 analog based cabling installations.
NVR technology has shown long term reliability in Federal prison environments, municipal, educational any most every other professional and private discipline.