Lines of resolution
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Lines of resolution is a measure of horizontal resolution in a video system. It was invented in the early days of television. Since analog transmission of video is line-based, the same number of 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.
Each stage in getting the picture to the display will lose some resolution.
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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