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:
Feb. 17, 1976
Filed:
Feb. 18, 1975
Shinji Amari, Hoya, JA;
Takashi Masuda, Tokyo, JA;
Sony Corporation, Tokyo, JA;
Abstract
In a system in which the polarity of the frequency converted chrominance signal or carrier is reversed during alternate lines of alternate fields recorded on alternate tracks on a recording medium and not reversed during the lines that make up the remaining alternate fields recorded in h-alignment on the remaining alternate tracks positioned in interleaving relationship with the first-mentioned tracks, logic-controlled switching means are provided to select the field intervals during which the plurality of the chrominance subcarrier will be reversed in alternate lines. The same logic circuits can be used to control the switching during both recording and reproducing so that the alternate plurality reversal of the chrominance subcarrier will take place during the proper fields during reproduction of the recorded signals. Furthermore, the flip-flop that controls the switching circuit to reverse polarity of the chrominance signal or carrier is, itself, controlled to start always in the correct polarity in those field intervals when it is operative.