TVL

TVL stands for TV Lines. It is a measurement of the horizontal resolution, or how many sections the image is split into horizontally. These lines are constantly updated to make the video image move. The more TV lines there are, normally, the better the picture quality can be. Notice, I wrote can be. There are other factors that go into  the quality of the image, like the image sensor type (CCD or CMOS), the size of the image sensor, the overall quality of it, and also the type of lens being used.

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