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:
Jan. 09, 2001
Filed:
Mar. 05, 1999
Takumi Usui, Utsunomiya, JP;
Aiwa Co., Ltd., Tokyo, JP;
Abstract
A digital signal recording method and apparatus for recording digital signals of two channels along tracks on a magnetic tape in a helical pattern by employing at least two pairs of rotary heads mounted on a rotatable drum oppositely to each other and by making use of a read-after-write function, the paired heads being disposed adjacent to each other. The input signal to be recorded is compressed such that the digital signal recording period for each relevant track is shortened by a ratio corresponding to a time for which a write period for one track and a read period for adjacent one overlap each other. The write period and the read period are thus prevented from overlapping. The reproduced signal for the read-after-write function is prevented from being masked by an input signal recording current.