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:
Apr. 21, 1987
Filed:
Feb. 09, 1984
Applicant:
Inventor:
Takahiko Fukinuki, Kokubunji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 12 ; 358 16 ; 358142 ;
Abstract
A television signal transmission system is improved to be able to transmit a video signal having a frequency band wider than existing transmission frequency bands while maintaining compatibility with existing television systems. On the sending side, a wide-band luminance signal is frequency-shifted and inserted into a vacant frequency spectrum of a television signal in the existing television systems before transmission.