Apparatus for controlling display of an image on a large aspect

Details Apparatus for controlling display of an image on a large aspect Apparatus for controlling display of an image on a large aspect

1991-03-08

1993-06-15

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358 12, 358141, H04N 1120, H04N 566, H04N 701, H04N 704

Patent

active

052204235

ABSTRACT:
In a television receiver having a picture tube with the picture plane aspect ratio being different from the image size aspect ratio in the existing standard television system, when an image in the existing standard television system is displayed, variation in the video signal positioned adjacent to at least one of the vertical ends on the picture plane of the picture tube is detected. If no variation an enlargement mode enlarging the image size is selected, and if any variation a normal mode displaying the image in ordinary size is selected, thereby the enlargement mode or the normal mode is selected automatically in response to the effective image size and the troublesome work of manually changing the modes is eliminated.

REFERENCES:
patent: 4385324 (1983-05-01), Shioda et al.
patent: 4394690 (1983-07-01), Kobayashi
patent: 4797746 (1989-01-01), Ashcraft
patent: 4864405 (1989-09-01), Chambers
patent: 4953025 (1990-08-01), Saitoh et al.
patent: 4984078 (1991-01-01), Skinner et al.
patent: 4984081 (1991-01-01), Miyochi et al.
patent: 5103309 (1992-04-01), Hara
patent: 5161002 (1992-11-01), Rodriguez-Cavazos et al.

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