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:
Oct. 16, 1984
Filed:
Dec. 16, 1981
Seigo Asada, Moriguchi, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
In a chrominance signal reproduction system for a colored image signal recording-reproducing apparatus in which two chrominance differential signals I and Q are frequency modulated and superimposed on each other to be recorded, and in the reproduction of the two modulated waves the carrier frequency f.sub.1 of the first modulated wave recorded in a low frequency band is converted to a higher carrier frequency f.sub.3 and demodulated, the higher carrier frequency f.sub.3 is selected so as to be separated from the sum frequency f.sub.1 +f.sub.2 component of the carrier frequency f.sub.2 component of the modulated wave recorded in the higher frequency band and the carrier frequency f.sub.1 component of the modulated wave recorded in the lower frequency by more than the frequency band of the demodulated signal. By setting the frequency f.sub.3 in this way, any beat interference can be eliminated from the reproduced signal of the signal recorded in the lower frequency band.