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:
Jun. 30, 1987
Filed:
Jan. 06, 1986
Hitachi, Ltd., Tokyo, JP;
Abstract
A video signal processing circuit for producing a still image picture which can be reduced memory capacity. A digital video signal is divided into higher-significant bit and lower-significant bit which are stored in separate addresses of a memory device. The higher-significant bit data is written in the first address. The lower-significant bit data and an identification data signal are written in the following addresses when the present higher-significant bit data is the same as former higher-significant bit data written in the previous address. The lower-significant bit data and a higher-significant bit data of 1 bit are written in the following addresses when the present higher-significant bit data is different from the former higher-significant bit data of the previous address. When the data read from the memory device are the higher-significant bit data, they are compared with the previously read higher-significant bit data, and the lower-significant bit data is produced in a certain value and then the produced lower-significant bit data and the higher-significant bit data read from the memory device are combined to be outputted as a complete video signal. When the data read from the memory device is a lower-significant bit data, the latest higher-significant bit data stored in the previous address is combined with the read lower-significant bit data to be produced as a complete video signal.