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:
May. 12, 1992
Filed:
Aug. 08, 1989
Kengo Sudoh, Hiroshima, JP;
Hiroshi Ii, Hiroshima, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An azimuth recording system has been adopted in order to heighten the recording intensity in a DAT (digital audio tape) recorder of rotary head type. For this reason, the width of a track is made more narrow than that of the magnetic head, and tracking control is conducted on the basis of the reproduction signals from the tracks at both sides during reproducing. In such a DAT recorder, in the case of rewriting data, the magnetic head is changed over to the recording mode at a point of time when reproduction operation is terminated for a corresponding track so that rewriting begins at a track which is disposed at least one thereafter the track to be rewritten, and new data is recorded, thereby causing a desired track which must be maintained to be prevented from being recorded over by a new track. In addition, a distinguisher information is recorded in each of tracks. In the case the same distinguisher information is detected when a distinguisher information is read out and compared, data which has been previously read out is not outputted, thereby ensuring that data which must be originally deleted, be prevented from being erroneously outputted. Therefore, a rewriting operation can be easily conducted without the need of any complicated control circuits.