Compatible wide aspect ratio receiver with spatial filtering for

Details Compatible wide aspect ratio receiver with spatial filtering for Compatible wide aspect ratio receiver with spatial filtering for

1992-09-08

1994-01-04

Powell, Mark R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358180, H04N 546

Patent

active

052765156

ABSTRACT:
A video signal processing circuit is provided to display an image of a standard television signal on a display unit with a 6:9 aspect ratio by enlarging an image of a video signal in the horizontal and vertical directions by a magnification factor which depends on the feature of the standard television signal. The processing circuit includes a first memory circuit which reads out the stored video signal in response to a read clock different from the write clock and generated by a stable frequency source so that the image of the video signal is expanded in the vertical direction, a second memory circuit which implements time-base compression for the output of the first memory circuit and thereafter expands the signal, a spatial filter which implements filtering for the output of the second memory circuit, an enlargement control circuit which control the above-mentioned circuits, and a synchronizing processing circuit. The circuit arrangement enables video signals of various image sizes, such as for movie pictures, to be displayed by signal conversion on a display unit with a 16:9 aspect ratio, and is capable of suppressing jitters of video signals.

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patent: 4496974 (1985-01-01), Heitmann
patent: 4729012 (1988-03-01), Jose et al.
patent: 5016103 (1991-05-01), Rabii
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patent: 5084765 (1992-01-01), Morita et al.
patent: 5089893 (1992-02-01), Iwase
patent: 5119193 (1992-06-01), Noji
patent: 5134479 (1992-07-01), Ohishi
patent: 5170256 (1992-12-01), Tabata
patent: 5191417 (1993-03-01), Skinner et al.

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