Aspect ratio converting apparatus and method

Details Aspect ratio converting apparatus and method Aspect ratio converting apparatus and method

1992-10-26

1994-06-21

Kostak, Victor R.

Television

Format conversion

Conversion between standards with different aspect ratios

H04N 701

Patent

active

053232356

ABSTRACT:
An aspect ratio converting apparatus and method convert a picture having an aspect ratio of 4:3 into a picture having an aspect ratio of 16:9. The cut mode or the wide mode is freely selected in accordance with the state of video signals. When the cut mode is selected, after both end portions of the picture are cut by a predetermined width, the picture is compressed. A side panel image having a predetermined luminance is added to both sides of the compressed picture, thereby producing a picture having a wide aspect ratio. When the wide mode is selected, a side panel image having a predetermined luminance is added to both sides of the compressed picture, thereby producing a picture having a wide aspect ratio. Furher, by detecting the available period in a horizontal scanning period of the picture in which picture information actually exists, it is possible to automatically set the region of the picture which is compressed.

REFERENCES:
patent: 4651208 (1987-03-01), Rhodes et al.
patent: 4729012 (1988-03-01), Jose et al.
patent: 5068728 (1991-11-01), Macovski
patent: 5128747 (1992-07-01), Isnardi et al.
patent: 5134479 (1992-07-01), Ohishi
patent: 5159438 (1992-10-01), Rabii

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