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.

Date of Patent:
Jul. 06, 1976

Filed:

Dec. 30, 1974
Applicant:
Inventors:

Hisaaki Narahara, Musashino, JA;

Yoshio Ishigaki, Tokyo, JA;

Assignee:

Sony Corporation, Tokyo, JA;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358-4 ;
Abstract

In recording PAL television signals, the chrominance signal components of field intervals are recorded in successive parallel tracks on a record medium. The ends of the margins between the line intervals of each field are recorded in each of the tracks and are aligned, in the direction transverse to the lengths of the tracks, with the adjacent ends of such margins in the next adjacent tracks. Interference, or cross-talk, between signals recorded in adjacent tracks is reduced or eliminated during reproduction by converting the alternating polarity chrominance component into one of fixed polarity, similar to an NTSC signal, and then recording the information signals with different first and second carriers in the adjacent tracks, respectively. Such first and second carriers for signals recorded in adjacent tracks may be distinguished from each other by their respective frequency and/or polarity characteristics. When the signals recorded in a particular track are reproduced, the cross-talk signals from adjacent tracks can be conveniently suppressed or eliminated, for example, with the aid of a simple comb filter, by reason of the different frequency and/or polarity characteristics of the carriers of interfering signals. The signals are then reconverted to form to be played back on apparatus designed to reproduce images in response to signals.


Find Patent Forward Citations

Narahara, Hisaaki. (1976). Magnetic recording and/or reproducing apparatus (U.S. Patent No. 3968514). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3968514

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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