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:
Aug. 28, 1990
Filed:
May. 17, 1989
Mitsumasa Saitoh, Kanagawa, JP;
Seiichi Ogawa, Tokyo, JP;
Miyuki Yamane, Tokyo, JP;
Hideki Fukasawa, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
In an apparatus for converting received video signals of a first format, which has a first number of horizontal lines in a field or frame and a picture display of a first aspect ratio, to video signals of a second format, which has a second number of horizontal lines in a field or frame and a picture display of a second aspect ratio; an analog-to-digital converter converts the received video signals of the first format to digital video signals, a memory has addresses at which there are written at least a field of the digital video signals of the first format, whereupon, a reading circuit reads from the memory addresses less samples of the digital video signals than were written in the memory and the digital video signals thus read from the memory are converted back to analog form, and a controller is provided for variably determining a start address of the addresses in the memory from which video signal data are read. In the case where the first aspect ratio is larger than the second aspect ratio, the selection of the start address determines a portion or portions of the picture display of the first aspect ratio to be omitted at least at one side of the picture display of the second aspect ratio.