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:
Dec. 25, 1984
Filed:
Jul. 06, 1982
Yoshio Tokuyama, Yokohama, JP;
Victor Company of Japan, Ltd., Kanagawa, JP;
Abstract
A video signal recording and reproducing apparatus records and reproduces a video signal on and from a magnetic tape, by selecting an arbitrary recording and reproducing mode from among a plurality of recording and reproducing modes in which tape traveling speed and track pitch differ, and by selecting a plurality of pairs of video heads. The recording and reproducing apparatus comprises a recording and reproducing circuit having a plurality of pairs of video heads, for recording a frequency-modulated video signal on tracks formed obliquely with respect to the longitudinal direction of the magnetic tape and reproducing the recorded frequency-modulated video signal from the tracks by a selected pair of video heads, a capstan for driving the magnetic tape in travel at a speed in accordance with the selected recording and reproducing mode, a head servo circuit supplied with a vertical synchronizing signal within the video signal or a signal in phase synchronism with the vertical synchronizing signal as a reference signal upon recording, and supplied with a reference signal from a reference signal generating circuit upon reproduction, for rotating the plurality of pairs of video heads at a constant speed, a first delay circuit for delaying a signal used as the reference signal for the head servo circuit, a control head for recording an output signal of the first delay circuit as a control pulse onto a control track on the magnetic tape, a second delay circuit for delaying an input signal or an output signal of the first delay circuit, and a capstan servo circuit supplied with a signal obtained by detecting the rotation of the capstan and an output signal of the second delay circuit upon recording, and supplied with a reproduced control pulse from the control head and the output signal of the second delay circuit upon reproduction, for comparing phases of the signals supplied thereto, to rotate the capstan at a speed in accordance with the selected recording and reproducing mode by a compared output.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile