Reliability. An NVR can achieve redundancy by redirecting the video to a new destination over the network in case of server failure. What's more, with the NVR's single-port encoders you eliminate the single-point-of-failure problem common to most DVRs.
Frame rate and image quality. With top-of-the-line NVR solutions, you can view all cameras at one rate (30 fps NTSC) and record them at a different frame rate (from 1-30 fps per camera), enabling increased efficiency in managing bandwidth demands for transmission and storage.
Storage costs. More than half of a DVR's cost can come from storage. An NVRS reduces storage demands by employing MPEG-4 compression over the network instead of coaxial cabling. An NVRS solution can save 20 to 30 percent in recording and storage costs over the DVR just by moving the video compression to the source (the camera), away from the traditional recording unit (the DVR).
Hardware costs and flexibility. NVR technology adapts to a user's current infrastructure and hardware. It runs on off-the-shelf computing hardware, bringing system costs down significantly. When new PC hardware with greater CPU processing power becomes available, you can add it to new installations and still be compatible with locations running different hardware, because the NVRS software has interoperability with every other location.
Protection. Because the NVR is based on standardized networking protocol and runs on an off-the-shelf computer, it stays equipped with the latest virus protection and doesn't have to be "cleaned" or re-installed in case of a virus attack.
Future Proof. Hardware-based solutions tend to need upgrading or replacement every few years?often an expensive undertaking. But software-driven systems like NVRSs never have to be thrown away. As new versions of NVR software or different compression methods become available, users can upgrade without changing any hardware.
There's no doubt that DVR technology has delivered significant improvements in terms of capabilities and overall security system management. But the current analog-input DVR box is not the final word in the evolution of video recording technology. If you're going to go digital, you want the entire system to be digital.
Eli Gorovici is president and CEO of DVTel. Mr. Gorovici has more than 12 years of senior management experience in digital data communications, including his time as VP of global sales and marketing for NICE's Visual Interaction Management Division.