Television – Basic receiver with additional function – Multimode
Patent
1995-08-15
1997-03-25
Lee, Michael
Television
Basic receiver with additional function
Multimode
348564, 348913, 348558, H04N 546
Patent
active
056149565
ABSTRACT:
A wide display screen television receiver having a plurality of video display modes, the optimum display mode is automatically selected depending on a kind of material of an input video signal includes a display control for displaying a picture corresponding to the input video signal on the display screen in a plurality of display modes by controllably changing a size of the picture in the horizontal direction and/or vertical direction. The number of horizontal lines from the heading line of each field of the input video signal is counted up with a counter. A detection region setting circuit respectively sets, in the upper and lower regions and the center region of the display screen, the detection region in the predetermined range designated by a single line to a plurality of lines for each field of the input video signal on the basis of the counted value of the counter. Existence of the picture is detected by a video existence detecting circuit in a plurality of detection regions preset by the detection region setting circuit. On the basis of the detected output of the video signal existence detection circuit any one of a plurality of display modes can be selected.
REFERENCES:
patent: 5249049 (1993-09-01), Kranawetter et al.
patent: 5347318 (1994-09-01), Kobayashi et al.
Ohnishi, Wide Television, Jul. 1973, Japanese Society of Television; No. 7, vol. 47.
Lee Michael
Maioli Jay H.
Sony Corporation
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