The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1991
Filed:
Apr. 25, 1989
Kenji Katsumata, Yokohama, JP;
Shigeru Hirahata, Yokohama, JP;
Masato Sugiyama, Yokohama, JP;
Takaaki Matono, Yokohama, JP;
Kazuo Ishikura, Kanagawa, JP;
Sunao Suzuki, Kamakura, JP;
Kazuhiro Kaizaki, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Video Engineering, Inc., Yokohama, JP;
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.