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Distinguish HD camcorder
Jan 23, 2017

In general commercial surveillance cameras is based on 420 lines, 480, 520 line to represent the camera's resolution, number of horizontal scan lines on the monitor. Pixels and businesses tend to be exaggerated, so surveillance cameras do not, measured in pixels.

According to professional interpretation, usually only two surveillance cameras, low solution about 330 lines, high resolution 480 line or so. Many domestic enterprises product annotation, 420 line actually is 330 lines of products. Generally camera 480 lines in the past referred to as HD camera. With the improvement of production technology, processing power to 7MH DSP high pass filter enable horizontal resolution of about 520 lines, so there was a further HD surveillance camera products. 

But in essence, its analog surveillance cameras at the existing DSP and manufacturing technologies on the basis of a limited lifting, which conventional 480-line HD standards to 520 or 540 lines. Actual camera image clarity, in addition to using CCD technology indicators, signal processing techniques such as crochet back-end circuit, contrast, color reduction, signal to noise ratio, choose lenses, focusing accuracy, among other factors, can affect the clarity of the image.