公开(公告)号：US20200251135A1

公开(公告)日：2020-08-06

申请号：US16777411

申请日：2020-01-30

Applicant: FUJIFILM Corporation

Inventor： Norihito Kasada ,  Eiki Ozawa ,  Atsushi Musha

IPC: G11B5/584 ,  G11B20/10 ,  G11B5/702 ,  G11B5/70 ,  G11B5/706 ,  G11B27/022 ,  G11B5/78 ,  G11B5/708 ,  B82Y10/00 ,  G11B5/00 ,  B82Y25/00

Abstract: The magnetic tape includes a non-magnetic support; and a magnetic layer, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference L99.9−L0.1 between a value L99.9 of a cumulative distribution function of 99.9% and a value L0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an absolute value ΔN of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 or more and 0.40 or less.

公开(公告)号：US09747161B2

公开(公告)日：2017-08-29

申请号：US14923441

申请日：2015-10-27

Applicant: FUJIFILM CORPORATION

Inventor： Atsushi Musha ,  Osamu Shimizu

IPC: H03M13/03 ,  G06F11/10 ,  G11B20/10 ,  H03M13/00 ,  G11B5/008 ,  G11B5/012

CPC classification number: G06F11/1076 ,  G11B5/00821 ,  G11B5/012 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/10268 ,  H03M13/6325 ,  H03M13/6331 ,  H03M13/6343

Abstract: The invention provides a signal processing device, including: an extraction section that extracts, from an input digital signal, a decoding target signal at an extraction timing that has been determined as a timing for extracting the decoding target signal; a decoding section that decodes the decoding target signal by estimating, by a maximum likelihood decoding, a candidate for a decoding result of the decoding target signal extracted by the extraction section and detecting a maximum likelihood decoding result; and an adjustment section that adjusts the extraction timing using a likelihood of the candidate for the decoding result estimated by the decoding section.