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61. 发明申请

US20070242376A1 Magnetic recording and reproduction method, recording apparatus, reproduction apparatus and magnetic recording medium 失效
标题翻译：磁记录和再现方法，记录装置，再现装置和磁记录介质
公开(公告)号：US20070242376A1
公开(公告)日：2007-10-18
申请号：US11726233
申请日：2007-03-21
申请人： Toshiyuki Nakagawa , Hiroyuki Ino , Tomoyuki Hiura , Tomohiro Ikegami , Masaaki Hara , Norihito Mihota , Shinichi Fukuda , Yoshihiko Deoka , Hidetoshi Honda
发明人： Toshiyuki Nakagawa , Hiroyuki Ino , Tomoyuki Hiura , Tomohiro Ikegami , Masaaki Hara , Norihito Mihota , Shinichi Fukuda , Yoshihiko Deoka , Hidetoshi Honda
IPC分类号： G11B20/10
CPC分类号： G11B5/584 , G11B5/0083 , G11B5/00865
摘要： A magnetic recording and reproduction method includes the steps of recording a plurality of tracks which make a unit for a signal process for data detection by means of a recording head on a magnetic recording medium, and reproducing signals of the plural tracks by a plural number of times in different positional relationships to the tracks by means of a reproduction head which can reproduce a signal across the plural tracks of the magnetic recording medium, collecting the reproduction signals in the unit and performing a signal process for the unit to produce reproduction signals for the individual tracks.
摘要翻译：磁记录和再现方法包括以下步骤：通过磁记录介质上的记录头将多个磁道记录在数据检测用信号处理单元上，并通过多个通过可以再现磁记录介质的多个轨道上的信号的再现头与轨道的不同位置关系的时间，收集单元中的再现信号，并且执行用于该单元的信号处理以产生用于个别曲目。

62. 发明申请

US20060039078A1 Reproducing apparatus and reproducing method for reproducing data by scanning slant tracks using a plurality of reproducing heads 失效
公开(公告)号：US20060039078A1
公开(公告)日：2006-02-23
申请号：US11205947
申请日：2005-08-17
申请人： Shinichi Fukuda , Tadashi Ozue
发明人： Shinichi Fukuda , Tadashi Ozue
IPC分类号： G11B5/584 , G11B27/36 , G11B15/12
CPC分类号： G11B5/584
摘要： First, data is read from tracks formed on a tape-shaped recording medium by heads disposed on a rotary drum, to measure error rates. Next, of the tracks formed on the tape-shaped recording medium, a worst track suffering the highest error rate is detected based on the error rates thus measured. Then, a pair of reproducing heads that can reproduce the worst track thus detected at the lowest error rates is detected from the measured error rates. Thereafter, tracking servo control is performed such that the worst track can be scanned by the pair of reproducing heads. As a result, a reproducing apparatus capable of proper reproduction even when recorded tracks undergo variations in width and reproducing heads are erroneously mounted.

63. 发明授权

US06515836B2 Magneto-resistive effect type magnetic head and magnetic tape apparatus 失效
公开(公告)号：US06515836B2
公开(公告)日：2003-02-04
申请号：US09876405
申请日：2001-06-07
申请人： Tadashi Ozue , Shinichi Fukuda , Toshio Shirai
发明人： Tadashi Ozue , Shinichi Fukuda , Toshio Shirai
IPC分类号： G11B531
CPC分类号： G11B5/0086 , G11B5/035 , G11B2005/0016
摘要： A magneto-resistive effect type magnetic head (12) has a head width Wh greater than the track width Wt of a magnetic tape (5), as measured in the width direction of the tape (5). The head (12) has a magneto-resistive effect element, which has a magnetism-detecting section arranged at the prescribed azimuth angle. A signal reproduced from the magnetic tape as the head (12) is moved while off-tracked in the widthwise direction Wh of the recording track T1. The signal has a specific characteristic that falls within a predetermined range for a reference value, provided that it has been generated from the magnetism the head (12) has detected over its effective width We.

64. 发明授权

US06278569B1 Signal recording apparatus and method 失效
标题翻译：信号记录装置及方法
公开(公告)号：US06278569B1
公开(公告)日：2001-08-21
申请号：US09326571
申请日：1999-06-07
申请人： Shinichi Fukuda
发明人： Shinichi Fukuda
IPC分类号： G11B1514
CPC分类号： G11B15/125 , G11B5/0086 , G11B5/00878 , G11B5/534 , G11B15/1875
摘要： A signal recording apparatus and method supplies recording signals to at least a pair of positive and negative azimuth magnetic heads provided on a rotary drum so as to be adjacent to each other in all recording occasions for recording by the magnetic heads when a recording track having a first track width is formed on the magnetic tape, while the apparatus and method supplies recording signals to at least the pair of positive and negative azimuth magnetic heads once in a predetermined number of recording occasions for recording by the recording heads when a recording track having a second track width which is larger than the first track width is formed on the magnetic tape.
摘要翻译：信号记录装置和方法在所有的记录场合中将至少一个设置在旋转磁鼓上的正和负方位磁头的记录信号提供给所有记录场合，以便在具有第一轨道宽度形成在磁带上，而该装置和方法将记录信号提供给至少一对正方位磁头和负方位磁头一次，以预定数量的记录场合记录，当记录磁道具有在磁带上形成大于第一轨道宽度的第二轨道宽度。

65. 发明授权

US5202801A Integrated circuit for producing sensor detection signals in a recording/reproducing apparatus 失效
标题翻译：用于在记录/再现装置中生成传感器检测信号的集成电路
公开(公告)号：US5202801A
公开(公告)日：1993-04-13
申请号：US586203
申请日：1990-09-21
申请人： Shinichi Fukuda
发明人： Shinichi Fukuda
IPC分类号： G11B15/467
CPC分类号： G11B15/467
摘要： An integrated circuit includes a drum phase detection signal generating unit formed by two-stage amplifiers and a comparator, a drum frequency detection signal generating unit similarly formed by two-stage amplifiers and a comparator, a capstan frequency detection signal generating unit, and a supply reel frequency detection signal generating unit and a take-up reel frequency detection signal generating unit each formed by a comparator. From each associated voltage source a predetermined voltage is applied to each of the first stage amplifiers, second stage amplifiers, and to the comparators of the drum phase detection signal generating unit, drum frequency detection signal generating unit, capstan frequency detection signal generating unit, supply reel frequency detection signal generating unit, and the take-up reel frequency detection signal generating unit. In this manner, the drum phase detection signal generating unit, drum frequency detection signal generating unit, capstan frequency detection signal generating unit, supply reel frequency detection signal generating unit, and the take-up reel frequency detection signal generating unit may be formed on one and the same integrated circuit and can be operated in stable fashion.

66. 发明授权

US4626826A Method and apparatus for encoding and decoding an NRZI digital signal with low DC component and minimum low frequency components 失效
标题翻译：用于对具有低DC分量和最小低频分量的NRZI数字信号进行编码和解码的方法和装置
公开(公告)号：US4626826A
公开(公告)日：1986-12-02
申请号：US663148
申请日：1984-10-22
申请人： Shinichi Fukuda , Yuichi Kojima
发明人： Shinichi Fukuda , Yuichi Kojima
IPC分类号： H03M7/14 , G11B20/14 , G11B20/16 , H04L25/49 , H04L3/00
CPC分类号： G11B20/1426
摘要： A converted digital signal is provided in an NRZI (non-return to zero, inverted) code with a zero DC component and with a maximum predetermined number of bits between level transitions in the signal. The base digital signal is divided into m-bit base words, each of which is then converted into an n bit converted code word to form a converted digital signal suitable for recording. The n-bit converted code word is selected from a plurality of primary combinations or code words having a DC component substantially equal to zero when NRZI-coded and a plurality of secondary combinations or code words having a DC component with an absolute value of two when NRZI-coded. A variance of the DSV (digital sum variation) of each primary combination when NRZI-coded and a polarity of the DC component of each secondary combination when NRZI-coded are altered in response to the DSV at the exit of the preceding converted digital signal.
摘要翻译：经转换的数字信号以零直流分量和信号中电平转换之间的最大预定位数的NRZI（非归零，反相）码提供。基本数字信号被分成m位基本字，然后将每个基本字转换为n位转换码字，以形成适合于记录的转换数字信号。从NRZI编码的DC分量基本上等于零的多个主要组合或代码字中选择n比特转换的代码字，以及当具有绝对值为2的DC分量的多个辅助组合或代码字时 NRZI编码。当NRZI编码的NRZI编码的每个主要组合的DSV（数字和变化）和每个次级组合的DC分量的极性响应于先前转换的数字信号的出口处的DSV而被改变。

67. 发明授权

US4617552A Method and apparatus for converting a digital data 失效
标题翻译：用于转换数字数据的方法和装置
公开(公告)号：US4617552A
公开(公告)日：1986-10-14
申请号：US644445
申请日：1984-08-27
申请人： Yuichi Kojima , Shinichi Fukuda
发明人： Yuichi Kojima , Shinichi Fukuda
IPC分类号： H03M7/14 , G11B20/14 , H04L25/49 , H03M7/00
CPC分类号： G11B20/1426
摘要： A method for converting a digital data into an NRZI-coded digital signal is disclosed which is carried out by the steps of first detecting if the value of every even numbered bit of the digital data is digital zero, second detecting if two bits of the detected even numbered bits having digital zero value and a preceding odd numbered bit have a DC component, producing a detecting signal according to the result of the second detecting; and converting the digital data into the NRZI-coded digital signal by using the detecting signal.An apparatus for converting a digital data into an NRZI-coded digital signal is also disclosed which includes a first means for detecting if the value of every even numbered bit of the digital data is digital zero, a second means for detecting if two bits of the detected even numbered bits having digital zero value and a preceding odd numbered bit have a DC component, a means for producing a detecting signal according to the result of the second detecting, and a means for converting the digital data into the NRZI-coded digital signal by using the detecting signal.
摘要翻译：公开了一种将数字数据转换为NRZI编码的数字信号的方法，其通过以下步骤来执行：首先检测数字数据的每个偶数位的值是否为数字零，第二检测是否检测到两位具有数字零值的偶数位和前一奇数位具有DC分量，根据第二检测结果产生检测信号; 并通过使用检测信号将数字数据转换成NRZI编码的数字信号。还公开了一种用于将数字数据转换成NRZI编码的数字信号的装置，其包括用于检测数字数据的每个偶数位的值是否为数字零的第一装置，用于检测数字数据的两位是否为检测到的具有数字零值的偶数位和前一奇数位具有DC分量，根据第二检测结果产生检测信号的装置，以及用于将数字数据转换成NRZI编码数字信号的装置通过使用检测信号。

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