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:
Mar. 09, 2004
Filed:
Jul. 27, 2001
Hideyo Shibata, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
Video signals are recorded according to the number of tracks corresponding to the broadcasting system for each basic unit. When control signals are recorded on a magnetic tape in the longitudinal direction, the duty ratio of the control signals for every N tracks recorded for each basic unit has a value different from that of the duty ratio of other control signals. At the time when the magnetic tape is reproduced CTL signals are obtained by forming waveforms of the reproduced amplified outputs by means of a waveform formation unit . A CTL signal duty ratio determination unit detects the border of a frame in accordance with the duty ratio. A broadcasting a system determination unit determines the broadcasting system based on the counting result of the CTL signals during one frame that has been counted by the CTL signal counting unit . Thereby, it is made possible to record and to reproduce programs of a differing broadcasting system by using an information recorder/reproducer of which the number of revolutions of the rotating cylinder and the transfer speed of the magnetic tape are the same.