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. 10, 1984
Filed:
Mar. 20, 1981
Akira Hirota, Chigasaki, JP;
Takashi Uchimi, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A video signal recording and/or reproducing system for recording a video signal onto a recording medium and reproducing the video signal from the recording medium comprises a discriminating signal generating circuit for generating a plurality of first discriminating signals respectively having a frequency of 2nf which is 2n times a predetermined frequency f (n is an integer greater than one), and a plurality of second discriminating signals respectively having a frequency of (2n-1)f, a mixing and multiplexing circuit for respectively and alternately changing over the first and second discriminating signals obtained from the discriminating signal generating circuit, every recording unit of one track, and mixing and multiplexing the first and second discriminating signals into the video signal, a recording device for recording the above multiplexed signal obtained from the mixing and multiplexing circuit, onto the recording medium, a reproducing device for reproducing the recorded multiplexed signal from the recording medium, a discriminating and reproducing circuit for discriminating and reproducing the first and second discriminating signals recorded in the reproducing tracks, from the reproduced signals obtained from the reproducing device; a demodulating circuit for obtaining the video signal from the reproduced signal supplied by the reproducing device, and demodulating the video signal thus obtained; and a circuit for using the discriminating signal obtained from the discriminating and reproducing circuit as a pre-established information. The first discriminating signals are recorded on one of the adjacent recording tracks by the recording device, and the second discriminating signals are recorded on the other of the adjacent tracks by the recording device.