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:
Jul. 22, 1986
Filed:
May. 06, 1983
Yasuo Nishitani, Osaka, JP;
Osahiko Yano, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a video tape recorder of the helical scan type having a pair of heads mounted on diametrically opposite positions of a rotary cylinder, a pilot signal is recorded through the heads on the same track with video signal during recording and edit modes. During 'insert' edit modes, the video heads are alternately switched between playback and recording modes in synchronism with each half revolution of the cylinder. A tape is wound over an arcuate extent greater than a semicircle of the circumference on the cylinder so that the video heads are simultaneously in contact with the tape at different positions to record a video signal over a major portion of the track and record a pilot signal over the full length of the track. One of the heads is in a recording mode and tracing the major portion of a given track, while the other head is in a playback mode tracing a minor portion of a subsequent track where the prerecorded pilot signal is present. A tracking signal is derived from the prerecorded pilot signal.