How can I choose to apply to hard disk video recorder (DVR)?-DVR, optional – Security Industry
Currently Market Appear on the DVR brand and type can be said to be varied, dazzling, flaunt video speed, storage capacity, compression ratio, high resolution images Product Everywhere, in the face dazzling features, elements and learn the pros and cons of how we should and how to choose their own products?
To distinguish between the digital video recorder (DVR) the advantages and disadvantages, from the recording rate, storage capacity, screen resolution, operation mode and other important properties of the carrier. However, these points of comparison, the market has many misconceptions. Many users blindly pursuing fast speed, large capacity, high definition, but in fact these three indicators do not know each other constraints, can not require all to the best of three; the operation is easy to use, are often the majority of projects Company Equipment selection officers ignored until the installation process only to find a waste of a lot of time.
Distinguish between good and bad indicators DVR
1. Video Speed On the video rate, the fact that all of the DVR in real time for all 30 images / sec or 60 map fields / sec (NTSC format), any more than this target advertising are unrealistic. If both records 16 images per second per channel rate is only 60/16 Figure 30/16 tickets or second field, multiple video, some DVR use of advanced image displacement Detect Approach greatly improved video rate, activity rate actually record the image almost immediately, there is no image shift detection than the video many times faster. But pay attention to image displacement detection means full screen video with video compression and recording the displacement of the camera the whole picture, not only image compression and recording Each camera image displacement activity in the part, although the latter can also enhance the video rate, but in Europe and the United States of Law , This image will not be used as evidence in court.
2. Storage capacity and backup Video capacity is the bigger the better, but the most important thing is to have interfaces to connect an external digital storage devices for image data backup, only to back up regularly to ensure that images can be valuable Security Preserved, and to facilitate transmission. The images a few months there is a machine built-in hard drive wise, once the machine damaged, all data will be completely lost.
3. Image Definition Level of image definition DVR directly reflects the quality, but from Technology Theoretically, the higher the resolution, the greater the storage capacity occupied, it allows users to adjust based on actual level of clarity is the best design, that almost all brands of products have already done.
4. Easy to operate or not
Operation is easy to use the final product adaptability in practical applications, more and more users want to use the best equipment all can be done by a key function of many manufacturers ignore the overall electrical equipment users the quality of the product range are designed to be functional, too complicated operation, the result difficult to promote. To improve this deficiency, now many manufacturers are constantly improving their products, such as using humanized Keyboard Simplify the daily operation of the use, or increase the function of the computer network interface, and follow the trend of network development, to expand its international market share.
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