Buy monitor camera attention to what
Due to the manufacturers in the DSP and related technology between the level of differences, so the product is also different, so the parameters are marked with the gap, and some marked 500 lines, and some standard 520 lines, there are marked 530 lines, the highest marked 540 lines, Even 600 lines. So a variety of line number classification, in fact, shows the differences between the various, of course, which also mixed with a small amount of domestic enterprises to 480 lines fake 500 lines above the product composition. In fact, even in the same 540 line products, because the manufacturers of production technology differences and DSP technology differences, the same line of products with different results. But with the naked eye to distinguish is more difficult to compare out, unless the professional testing equipment or image magnification to distinguish, or find one or two real high-end brand camera to contrast. But in essence, 520 lines or more are called high-definition cameras, but analog cameras in the existing DSP and manufacturing technology based on a limit upgrade, it will be the traditional 480 line HD standard to 520 lines Or 540 lines.
Because DSP and associated technology continues to improve, so many international type of camera manufacturing enterprises and domestic enterprises launched a different type of high-definition cameras.
The two contrast, so in the past we generally will be 480 lines of the camera called high-definition camera. In recent years, with the improvement of production technology, DSP processing can achieve 7MH high-pass filter, so that the level of resolution to 520 lines or so, therefore, there is a further high-definition camera products, that is 520 lines or 540 lines. But in fact the image clarity in the camera to achieve, in addition to the use of CCD technical indicators, the back-end signal processing technology such as hook circuit, contrast, color reproduction, signal to noise ratio, the installation of the lens and focus is accurate And so on factors, can affect the image clarity. The same product, the business line to 520 called high-definition camera products
1, how to identify civilian high-definition camera? In general, civilian-grade optional cameras are all to 420 lines, 480 lines, 520 lines, etc. to represent the clarity of the camera, that is, on the monitor level Number of lines scanned. So the so-called business mouth of the pixels will be insignificant, because often will be exaggerated, in fact, difficult to achieve, so the civilian choice of monitoring the head should not be a measure of pixels. According to the interpretation of professionals, the usual surveillance cameras only two grades: low 330 lines or so, high solution 480 lines or so, many domestic products marked 420 lines is the 330 line products
