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Before introducing the difference between dvr and nvr, we will introduce the concept of dvr and nvr. The NVR is an abbreviation of (Network Video Recorder). The most important function of the NVR is to receive the digital video code stream transmitted by the IPC (Network Camera) device through the network, and store and manage it, thereby realizing the distributed architecture advantage brought by the network. Simply put, with Nvr, you can simultaneously view, browse, play back, manage, and store multiple webcams. Get rid of the computer hardware, no longer need to face the tedious installation software. If all cameras are networked, then the only way to do this is to have a centralized management core.
DigitalVideoRecorder, a digital video recorder, is a hard disk recorder, also known as a DVR, compared to traditional analog video recorders. It is a computer system for image storage processing, with long-term recording, recording, remote monitoring and control of images/voices. DVR integrates video recorder, picture splitter, pan/tilt lens control, alarm control, network transmission. With five functions in one, it is possible to replace the functions of a large number of devices in the analog monitoring system with one device, and gradually gain an advantage in price.
The specific difference between NVR and DVR
In terms of surface structure, the difference between NVR and DVR is that there is a separate universal port for video input and output and network connection. Essentially, one of the most fundamental factors in distinguishing between DVR and NVR is whether the "digital" DVR compresses and converts the analog video signal and stores it in its hard disk.
"Digitalization" of a DVR means that the compression and storage techniques are for digital signals, rather than directly transmitting digitally encoded video images. Therefore the DVR must be deployed near the analog camera. Instead, the NVR can store digital images directly from the IP network. Therefore, the biggest difference between the NVR and the DVR is that the DVR encodes and decodes the analog video captured by the analog camera and stores it in the hard disk, while the NVR directly records the digital video that the camera has encoded. Therefore, the NVR has no video interface, and its input and output data are both IP data and compression-encoded video.