The last standards adopted by the FCC did not require a single standard for scanning formats, aspect ratios, or lines of resolution. This compromise resulted from a dispute between the consumer electronics industry (joined by some broadcasters) and the computer industry (joined by the film industry and some public interest groups) over which of the two scanning processes—interlaced or progressive—would be best suited for the newer digital HDTV compatible display devices. Interlaced scanning, which had been specifically designed for older analog CRT display technologies, scans even-numbered lines first, then odd-numbered ones. Interlaced scanning can be regarded as the first video compression model. It was partly developed in the 1940s to double the image resolution to exceed the limitations of television broadcast bandwidth. Another reason for its adoption was to limit the flickering on early CRT screens, whose phosphor-coated screens could only retain the image from the electron scanning gun for a relatively short duration. However, interlaced scanning does not work as efficiently on newer display devices such as Liquid-crystal (LCD), for example, which are better suited to a more frequent progressive refresh rate.
The last standards adopted by the FCC did not require a single standard for scanning formats aspect ratios or lines of resolution This compromise resulted from a dispute between the consumer electronics industry (joined by some broadcasters) and the computer industry (joined by the film industry and some public interest groups) over which of the two scanning processes—interlaced or progressive—would be best suited for the newer digital HDTV compatible display devices Interlaced scanning which had been specifically designed for older analog CRT display technologies scans even-numbered lines first then odd-numbered ones Interlaced scanning can be regarded as the first video compression model It was partly developed in the 1940s to double the image resolution to exceed the limitations of television broadcast bandwidth Another reason for its adoption was to limit the flickering on early CRT screens whose phosphor-coated screens could only retain the image from the electron scanning gun for a relatively short duration However interlaced scanning does not work as efficiently on newer display devices such as Liquid-crystal (LCD) for example which are better suited to a more frequent progressive refresh rate