Lines of resolution

Lines of resolution

Lines of resolution is a measure of horizontal resolution in a video system, as measured by the number of vertical black lines that can be resolved on a white background. The term was invented in the early days of television. Since analog transmission of video is scan line-based, the same number of "horizontal" lines is always transmitted. However, several factors impede the ability to display fine detail within a line:

# The camera or other source of material.
# The storage and processing of the picture.
# The transmission of the TV signal e.g. broadcast by radio or by cable.
# The reception and reproduction of the picture on a TV set.

The actual measure of 'lines of resolution' is how many "vertical" black-white lines can be resolved on a display. In comparison to modern ideas of resolution, 'lines of resolution' is essentially half the number of horizontal pixels. i.e 640x480 has 320 "lines of resolution".


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