Video signal processing circuit capable of enlarging and display

Details Video signal processing circuit capable of enlarging and display Video signal processing circuit capable of enlarging and display

1989-04-25

1991-07-02

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358160, 358140, H04N 544, H04N 700

Patent

active

050290061

ABSTRACT:
A video signal processing circuit capable of enlarging and displaying a picture and adapted for use in an apparatus in which a desired picture is selected, and a video signal representative of the desired picture under interlaced scanning is received, stored in a memory and processed to provide an enlarged video signal, comprises includes a real signal/interpolated signal preparation circuit for preparing, from the stored video signal, new scanning lines for an image to be enlarged, and a memory processing circuit having switching control function to store an output signal of the real signal/interpolated signal preparation circuit in a memory, read the video signal out of the memory at a period different from a period at which the output signal is stored in the memory, and delay a read-out signal by one or more fields so that an enlarged signal is delivered.

REFERENCES:
patent: 4528585 (1985-07-01), Bolger
patent: 4636857 (1987-01-01), Achiha et al.
patent: 4774581 (1988-09-01), Shiratsuchi
patent: 4853765 (1989-08-01), Katsumata et al.
patent: 4866520 (1989-09-01), Nomura et al.

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