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:
Jan. 29, 1980
Filed:
Oct. 25, 1977
Shoichiro Takayama, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A facsimile signal is compressed by skipping the continuous white cells longer than a predetermined length, and the compressed facsimile signal is transmitted in an analog form. When some portion of a facsimile signal is deleted due to the absence of a black cell in said portion, an f-signal indicating the deletion of said portion is inserted at the head of the deleted portion. The amplitude of the f-signal is twice as high as the highest level of a picture signal thus a reception station can differentiate the f-signal from a picture signal. The compressed facsimile signal is modulated to an AM.PM.VSB signal (Amplitude Modulation-Phase Modulation-Vestigial Side Band Modulation), and is transmitted to a communication line. When the reception station recognizes said f-signal, a predetermined number of white cells are inserted automatically on a printing paper at the reception station.