TV line. A resolution specifying the amount of black and white alternating lines that can be displayed in horizontal or vertical directions. It can be applied to both continuous media video devices (B/W CRT, three-gun CRT projector) and fixed pixel video devices (LCD, DLP, plasma). It's generally different from the pixel counts of a fixed pixel video device. See " Kell factor."

Commonly used measure of spatial frequency of periodic pattern in a TV picture expressed as a ratio of picture height to the half period of the pattern. E. g. for 625/50/2:1 scanning standard a 1 MHz video signal produces a periodic TV screen pattern.

Television Line. See lines of horizontal resolution.