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:
Mar. 12, 1985
Filed:
Jan. 21, 1982
Applicant:
Inventors:
Mutsuo Ogawa, Yokohama, JP;
Noboru Murayama, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358260 ; 358283 ; 358261 ;
Abstract
A digital communication system capable of representing tone differences is provided. In the present system, the threshold level used as a reference in converting an analog image signal into a binary image signal is varied, preferably, from scanning line to scanning line at the transmitter side. Then, at the receiver side, exchanging or rearranging of the binary image data between different scanning lines in the same address is carried out. By so doing, data compression technique may be advantageously applied at all times to maintain a high transmission rate.