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:
Dec. 19, 2000
Filed:
May. 05, 1999
Sony Corporation, Tokyo, JP;
Abstract
The present invention relates to an apparatus for azimuth-recording data on a magnetic recording medium. Heads (13a) and (13b) having azimuth angles different from each other are used and data are recorded on and reproduced from a plurality of adjacent tilted recording tracks on a magnetic tape T. A recording-system encoder (23) converts data to a code sequence in which null points of frequency spectrums are respectively provided at null points of waveform equalization characteristics of partial responses such as PR1, PR4, etc. For example, record-coding using a 8/10MSN code is performed. A reproduction-system equalizing circuit (28) performs waveform equalization based on the partial responses. Further, a data detector (29) detects the data by a Viterbi coding method for executing state transition during which the characteristic of the code sequence is adopted. Azimuth-recording in a narrow track width can be easily achieved while a reduction in effective recording speed due to an increase in the azimuth angle is being controlled.