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:
Sep. 15, 1992
Filed:
Dec. 12, 1989
Yoshihide Shinpuku, Kanagawa, JP;
Sony Corp., , JP;
Abstract
A method for recording and/or reproducing a signal in which three regions of a magnetization region in which magnetization is effected in a certain direction, a magnetization direction in which magnetization is effected in the opposite direction to that of the former region and a random magnetization region in which magnetization is effected randomly are arranged on a recording medium and digital data are recorded in correspondence with the three regions. Upon reproduction, a calculation is effected by using a reproduced signal and an isolated waveform information derived from the recording medium, thereby obtaining anticipated data whose most likelihood value is high, and this anticipated data is employed as detected data. Accordingly, a large reproduced output can be obtained in accordance with the change of magnetization, and freedom of the code itself can be increased, thereby improving the recording linear density as compared with the prior art.