Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1988-10-27
1990-08-21
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358180, 358140, 358254, H04N 565, H04N 701
Patent
active
049511491
ABSTRACT:
A television signal is provided with a variable aspect picture display ratio by the steps of generating and putting out the television picture signal in accordance with a predetermined signal format in a manner in which a selectable horizontal to vertical aspect ratio is governed by the number of horizontal scan lines used to scan picture content, and generating and putting out with the television picture signal a marker signal indicative of the aspect ratio selected. A conventional television set displays narrow aspect ratio transmissions as full screen displays and wide aspect ratio signals with top and bottom black bands, usually masked by overscan. A new television set receives the television signal and marker signal indicative of the aspect ratio selected. The new television set provides a wide aspect ratio display area and uses a marker signal extraction circuit to extract the marker signal, and a beam deflection control circuit operating under the control of the extracted marker signal to control deflection amplitudes of the picture display to generate a full height picture at a display screen of the display in accordance with the selected aspect ratio. The new television set may further include selectively positionable powered side area screening members, and a side screen control mechanism connected to the marker signal extraction circuit for selectively positioning the side area screening members relative to the display screen to cover unused side portions of the television screen in accordance with the aspect ratio selected.
REFERENCES:
patent: 2543136 (1951-02-01), Sweeney
patent: 4394690 (1983-07-01), Kobayashi
patent: 4556906 (1985-12-01), Dischert
patent: 4760455 (1988-07-01), Nagashima
Chin Tommy P.
Harrison David B.
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