What is the difference between a DVR and NVR ?

Both Network Video Recorders (NVRs) and Digital Video Recorders (DVRs) are used for video surveillance, but they differ in the way they handle and process video data. DVRs are designed to work with analog cameras and use coaxial cables to transmit the video signal. The video data is then processed and compressed by the DVR and stored on a hard drive. The video quality of the footage depends on the camera's resolution and the DVR's recording capability.

NVRs, on the other hand, are designed to work with IP cameras that transmit digital data over a network. NVRs receive the digital video signal and use software to process and manage the data. They offer higher video quality and greater scalability than DVRs. With an NVR, users can easily add or remove IP cameras from the network, and the system can be expanded as needed.

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In summary, the main differences between NVRs and DVRs are the type of cameras they work with, the way they process video data, and their scalability. NVRs work with digital IP cameras and use software to process and manage the video data, while DVRs work with analog cameras and use hardware to process and store the data. NVRs offer greater flexibility and scalability than DVRs, but they are generally more expensive.

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