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:
Oct. 13, 1987
Filed:
Nov. 16, 1983
Sony Corporation, Tokyo, JP;
Abstract
A method for recording a video signal having luminance and chrominance signals by using a plurality of rotary transducing heads on a recording tape moved longitudinally by a drive mechanism, in which the time axis of the video signal is extended as long as N times, the time axis expanded video signal is divided to N channels, and first and second pilot signals having a predetermined frequency are alternately inserted into a predetermined position of a horizontal blanking period of the divided video signal. In this case, the DC voltage level of the first and second pilot signals is selected near the white peak level and near the black level respectively. An apparatus for recording a video signal having luminance and chrominance signals on a recording tape is also disclosed which includes a circuit for expanding the time axis of the video signal, a divider for dividing the expanded video signal into a plurality of channel video signals, a circuit for producing first and second pilot signals having a predetermined frequency and DC voltage level, the DC voltage level of the first and second pilot signals being different each other and an adding circuit for adding said first and second pilot signals alternately in the horizontal blanking period of the plurality of channel video signals respectively.