Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1987-02-02
1989-09-05
Chin, Tommy P.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358146, 358230, H04N 708, H04N 712
Patent
active
048644056
ABSTRACT:
A cathode ray tube video display device is adapted to display wide aspect ratio signals by reducing the vertical scanning amplitude of the scanning raster. The scan is collapsed in the vertical direction without reducing the number of lines used to display the active picture, leaving unscanned bands at the top and bottom of the display. The device can change between a normal raster scanning mode and such a collapsed wide screen mode automatically in response to an indicator in the received video signal.
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British Broadcasting Corporation
Chin Tommy P.
O'Connell Robert F.
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