Television screen aspect ratio converting method and the device

Details Television screen aspect ratio converting method and the device Television screen aspect ratio converting method and the device

1992-12-28

1995-01-31

Kostak, Victor R.

Television

Format conversion

Conversion between standards with different aspect ratios

348432, 348458, 348556, 348913, H04N 701, H04N 546

Patent

active

053862368

ABSTRACT:
A television screen aspect ratio converting method and the device thereof which is suitable to display a video signal having a 4:3 screen aspect ratio on a screen having a 16:9 aspect ratio. According to the present invention, scanning lines amounting to 30 lines or less having unimportant information are removed in a vertical direction from an input video signal having a 4:3 screen aspect ratio, vertical interpolation is performed for the removed scanning lines, and then 4/5 time-compression in a horizontal direction is performed, so that the video signal is displayed on a screen having a 16:9 aspect ratio. Accordingly, picture loss in a vertical direction is minimized and the screen expansion in a horizontal direction is within a range such that a general televiewer cannot perceive a variation of image, so that integrity of image to be displayed after the conversion of screen aspect ratio can be maintained as is.

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"Better Video Images", SMPTE, 23rd Annual SMPTE Television Conference in San Francisco, 1989, 201-216.
"Conference and Exhibition on Television Techniques", Scientific Society for Telecommunication, The Budapest Regional Society of the MTESZ, 12-14, Jun., 1990, vol. II, pp. 56-62.

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