Video signal processing circuit capable of enlarging and displaying a picture
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United States of America Patent
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-
Jan 19, 1993
Issued Date -
N/A
app pub date -
Dec 27, 1990
filing date -
Apr 25, 1988
priority date (Note) -
Expired
status (Latency Note)
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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, 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.
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