公开(公告)号：US20200251139A1

公开(公告)日：2020-08-06

申请号：US16777201

申请日：2020-01-30

Applicant: FUJIFILM Corporation

Inventor： Norihito KASADA ,  Eiki OZAWA ,  Atsushi MUSHA

IPC: G11B5/702 ,  G11B5/008

Abstract: The magnetic tape include a non-magnetic support and a magnetic layer including ferromagnetic powder and a binding agent, 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 isoelectric point of a surface zeta potential of the magnetic layer is 5.5 or more.

公开(公告)号：US20200251134A1

公开(公告)日：2020-08-06

申请号：US16777312

申请日：2020-01-30

Applicant: FUJIFILM Corporation

Inventor： Norihito KASADA ,  Eiki OZAWA ,  Atsushi MUSHA

IPC: G11B5/584 ,  G11B20/10 ,  G11B5/706 ,  G11B5/702 ,  G11B5/708 ,  G11B27/022 ,  G11B5/39 ,  G11B5/70 ,  G11B5/78 ,  B82Y10/00 ,  G11B5/00 ,  B82Y25/00

Abstract: The magnetic tape includes a non-magnetic support and a magnetic layer including ferromagnetic powder and a binding agent, 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 isoelectric point of a surface zeta potential of the magnetic layer is 3.8 or less.

公开(公告)号：US20190341074A1

公开(公告)日：2019-11-07

申请号：US16401776

申请日：2019-05-02

Applicant: FUJIFILM Corporation

Inventor： Atsushi MUSHA

IPC: G11B20/10 ,  G11B5/008 ,  G11B5/584 ,  G11B5/78

Abstract: A magnetic tape reading apparatus includes a reading element unit which includes: a plurality of reading elements which are disposed in a state of being adjacent to each other and each of which reads data by a linear scanning method from a specific track region including a reading target track in a track region included in a magnetic tape; and an extraction unit which performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result.

公开(公告)号：US20160124811A1

公开(公告)日：2016-05-05

申请号：US14923441

申请日：2015-10-27

Applicant: FUJIFILM CORPORATION

Inventor： Atsushi MUSHA ,  Osamu SHIMIZU

IPC: G06F11/10 ,  G11B20/10 ,  H03M13/45 ,  G11B5/008

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.

Abstract translation: 本发明提供了一种信号处理装置，包括：提取部，其从输入数字信号中提取解码目标信号，该提取定时被确定为用于提取解码目标信号的定时; 解码部分，通过最大似然解码估计由所述提取部分提取的解码目标信号的解码结果的候选，并且检测最大似然解码结果来对所述解码目标信号进行解码; 以及调整部，其使用由解码部估计出的解码结果的候选者的似然度来调整提取定时。