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Tips on choosing DVR

2016/12/7 15:05:41 Click:

  If you want to choose a suitable DVR for your own use, you should first understand the manufacturers that meet the requirements, and make preliminary judgments according to the products provided by the manufacturers. Of course, the most important thing is to choose the products that are suitable for your own needs, which is a pragmatic choice. In the process of selecting DVR, we need to pay attention to several points:

1, image clarity
The higher the image sharpness, the larger the disk storage space and the higher the bandwidth required. Therefore, users can adjust the definition of high and low design according to the actual situation, which is the best design. Therefore, according to the actual situation of the project, users choose the products that are suitable for users.
2, image real-time
In terms of video rate, all DVR in real time are 25 frames per second (PAL format) or 50 map field / second (PAL format). It is also important to observe the real-time motion picture, observe whether there is delay and drag, and observe the maximum bit stream.
3, compression algorithm
At present, the compression algorithm of H.264 has not really realized the high compression ratio, and has a certain gap with the real H.264 algorithm, but it is the most ideal compression algorithm at present.
4. Network function
When checking the network function, we should not only check whether the product provides the Ethernet network interface, but also see whether it provides the supporting centralized monitoring and management system software, and really control the DVR through the network.
5. Alarm linkage
    DVR must have alarm and linkage interface, and related records of events, such as location, date, time, user address, name, telephone, unit name, alarm category, etc. once transmitted to the center, due to the transmission time function relationship among the units of the control system, it is necessary to reserve data for a period of time before receiving the alarm signal, so as to facilitate future acquisition. Process analysis at the time of certification.
6, storage and backup
In addition to regular backup, network backup is also a feasible backup method at present. Therefore, when purchasing, they should attach importance to the storage and backup performance of DVR devices.
7, operation convenience
When buying, you must experience it yourself. First, we should pay attention to whether the key design and layout of the front panel of the DVR device are clear, and whether each key is clearly marked. Second depends on whether the software menu is intuitive and friendly, and whether it is convenient for users to set and browse. Third, we need to see whether embedded DVR supports mouse, remote control and other operations.

8. Reliability and safety of video recording
9. Convenience of video retrieval
10, product cost performance ratio