Due to the current popularity of digital cameras, wireless surveillance systems engineering is also increasingly inclined to digital microwaves, and digital microwave surveillance backends use NVR to record rather than DVRs. The difference between DVR and NVR is as follows:
1, the quality problem between the two NVR is connected to the IPcamera recorder, so NVR video effects and the same camera. The camera works well so there are also NVR recorders. Because it does not need analog digital conversion, the output directly on the digital compression video and DVR video recording depends on the camera and the DVR's own compression algorithm and chip processing capabilities, so the image quality is generally subject to a certain degree of impact 2, the two expansion issues The DVR system is an analog front end, and the monitoring point is interconnected with the center DVR in analog mode. The NVR system is a digital front end due to the transmission distance and the loss of the analog signal. The monitoring point device and the NVR can be interconnected by any IP network. The difference between the two wiring DVR analog front-end, the center to each monitoring point need to lay video lines, audio lines, alarm lines, control lines, and many other lines, a little inattentive, which line has a problem and one manual troubleshooting Therefore, the workload of the wiring is quite tedious, and the larger the project size, the greater the workload and the higher the wiring cost.
In contrast, in the NVR system, both the center point and the monitoring point can be connected by only one network cable, which eliminates all the above-mentioned complicated lines including video lines, audio lines, etc., and the cost reduction naturally occurs.
4, both video storage problems DVR has a powerful video, storage capabilities, but this performance is still limited by its analog front end, that is, DVR can not achieve front-end storage, once the center device or line failure, video data can not be obtained ;
The NVR products and systems on the market can support three storage methods: central storage, front-end storage, and client storage. The center and the front-end can also be used as backups. Once the center cannot record for any reason, the system will automatically switch to the front-end recording. And storage; in the storage capacity, while the NVR has also installed a large-capacity hard drive, and set up a hard disk interface, network interface, USB interface, to meet the massive storage needs.
5, security issues DVR analog front-end transmission of audio, video and bare signals, without any encryption mechanism, it is easy to be illegally intercepted, and once intercepted it is easily displayed.
At present, NVR products and systems can already be encrypted through ACE streams to ensure the security of network monitoring. 6. Management problems DVRs can't realize the real-time monitoring and centralized management of transmission lines and front-end equipment because the center-to-front-end is an analog transmission. When there is a problem with the line, it is inconvenient to verify the specific reason.
The whole network management of NVR monitoring system should be said to be a major highlight. It can realize the whole process monitoring and centralized management of transmission lines, transmission networks and all IP front ends, including the monitoring of equipment status and the browsing of parameters.
1, the quality problem between the two NVR is connected to the IPcamera recorder, so NVR video effects and the same camera. The camera works well so there are also NVR recorders. Because it does not need analog digital conversion, the output directly on the digital compression video and DVR video recording depends on the camera and the DVR's own compression algorithm and chip processing capabilities, so the image quality is generally subject to a certain degree of impact 2, the two expansion issues The DVR system is an analog front end, and the monitoring point is interconnected with the center DVR in analog mode. The NVR system is a digital front end due to the transmission distance and the loss of the analog signal. The monitoring point device and the NVR can be interconnected by any IP network. The difference between the two wiring DVR analog front-end, the center to each monitoring point need to lay video lines, audio lines, alarm lines, control lines, and many other lines, a little inattentive, which line has a problem and one manual troubleshooting Therefore, the workload of the wiring is quite tedious, and the larger the project size, the greater the workload and the higher the wiring cost.
In contrast, in the NVR system, both the center point and the monitoring point can be connected by only one network cable, which eliminates all the above-mentioned complicated lines including video lines, audio lines, etc., and the cost reduction naturally occurs.
4, both video storage problems DVR has a powerful video, storage capabilities, but this performance is still limited by its analog front end, that is, DVR can not achieve front-end storage, once the center device or line failure, video data can not be obtained ;
The NVR products and systems on the market can support three storage methods: central storage, front-end storage, and client storage. The center and the front-end can also be used as backups. Once the center cannot record for any reason, the system will automatically switch to the front-end recording. And storage; in the storage capacity, while the NVR has also installed a large-capacity hard drive, and set up a hard disk interface, network interface, USB interface, to meet the massive storage needs.
5, security issues DVR analog front-end transmission of audio, video and bare signals, without any encryption mechanism, it is easy to be illegally intercepted, and once intercepted it is easily displayed.
At present, NVR products and systems can already be encrypted through ACE streams to ensure the security of network monitoring. 6. Management problems DVRs can't realize the real-time monitoring and centralized management of transmission lines and front-end equipment because the center-to-front-end is an analog transmission. When there is a problem with the line, it is inconvenient to verify the specific reason.
The whole network management of NVR monitoring system should be said to be a major highlight. It can realize the whole process monitoring and centralized management of transmission lines, transmission networks and all IP front ends, including the monitoring of equipment status and the browsing of parameters.
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