Tag: HD Digital
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The essential advantage of digitization is that it can obtain and express more abundant information, and can greatly reduce system overhead (resource occupation). Digital video surveillance systems must achieve high image quality (compared to analog systems) in order to be truly recognized and accepted by the market. In the process of digitizing the video system, there is a problem of how long the last video cable is, and where the analog-to-digital conversion is performed, that is, how to ensure that the system can obtain better image quality.
To promote high-definition surveillance systems, we must first define where HD images can show its advantages. Obviously, the value of high-definition images can be reflected when observing partial images and hoping to obtain image detail information. When the partial image is displayed in full screen, the image still has a high resolution; when the electronic police or road bayonet system performs the number plate recognition, a sufficient number of pixels can obtain a higher recognition rate; when the image is recognized, the high resolution (pixel) ) Images are an important condition. However, in the normal real-time monitoring environment, the observation effect of HD image and SD image is not much different; when performing image behavior analysis, the frame rate stability (time resolution capability) of the image is very high, and the image (space) is distinguished. The rate requirement is not high; when separating and analyzing the target, the information is mainly based on the contour, color and other information of the target, and does not pay attention to the image details.
High definition is borrowed from the concept of broadcast television, and has many understandings in the security industry, such as analog HD, large pixels, full HD and so on. Some are still standard-definition television systems; some (TV) scanning systems and baseband signal formats are different from standard-definition televisions, and are no longer compatible and are not interchangeable. At present, the high-definition video surveillance system has not yet formed a unified standard (standard), which realizes a complete supporting and unified interface for imaging, transmission, recording, display, image transformation and processing equipment in the system. This is also the problem that HD video surveillance technology should solve as soon as possible. The most urgent task is to solve the integration problem between HD and SD systems.
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