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 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:

  1. The camera or other source of material.
  2. The storage and processing of the picture.
  3. The transmission of the TV signal e.g broadcast by radio or by cable.
  4. 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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