公开(公告)号：EP0836186B1

公开(公告)日：2004-05-12

申请号：EP97307977.5

申请日：1997-10-08

申请人： SONY CORPORATION

发明人： Nakagawa, Toshiyuki ,  Ino, Hiroyuki ,  Yoshimura, Shunji ,  Kai, Shinichi ,  Shimpuku, Yoshihide ,  Iida, Michihiko ,  Kawashima, Tetsuji ,  Sato, Shoji

IPC分类号： G11B20/14 ,  G11B20/10

CPC分类号： G11B20/1426 ,  G11B20/10009

公开(公告)号：EP0836186A3

公开(公告)日：1999-04-07

申请号：EP97307977.5

申请日：1997-10-08

申请人： SONY CORPORATION

发明人： Nakagawa, Toshiyuki ,  Ino, Hiroyuki ,  Yoshimura, Shunji ,  Kai, Shinichi ,  Shimpuku, Yoshihide ,  Iida, Michihiko ,  Kawashima, Tetsuji ,  Sato, Shoji

IPC分类号： G11B20/14 ,  G11B20/10

CPC分类号： G11B20/1426 ,  G11B20/10009

摘要： If there is any portion in channel bit data obtained on converting a signal read out from a recording medium into a bilevel signal which fails to satisfy a condition concerning a minimum run length or a maximum run length of the same symbol, the channel bit data is corrected to improve the bit error rate to secure a skew margin. To this end, channel bit data not satisfying a minimum run length d' of the same symbol is detected by a (d'-1) detector 4 using n-tupled clocks obtained on n-tupling channel clocks of playback data by a bit clock generator 2, where n is an integer not less than 2. A correction position of the channel bit data having the run length of the same symbol equal to (d'-1) is designated by a correction bit position designating unit 5. A data correction unit 6 then corrects the channel bit data so that the minimum run length of the same symbol will be equal to d'.

公开(公告)号：EP0121384B1

公开(公告)日：1988-08-03

申请号：EP84301986.0

申请日：1984-03-23

申请人： SONY CORPORATION

发明人： Shimpuku, Yoshihide

IPC分类号： G11B5/52

CPC分类号： G11B5/09 ,  G11B5/488 ,  G11B5/534 ,  G11B5/56

公开(公告)号：EP0617517B1

公开(公告)日：1999-09-22

申请号：EP94104213.7

申请日：1994-03-17

申请人： SONY CORPORATION

发明人： Shimpuku, Yoshihide ,  Nakagawa, Toshiyuki

IPC分类号： H03M5/14 ,  G11B20/14

CPC分类号： G11B20/1426 ,  H03M5/145 ,  H04N5/9261 ,  H04N5/945

公开(公告)号：EP0617517A2

公开(公告)日：1994-09-28

申请号：EP94104213.7

申请日：1994-03-17

申请人： SONY CORPORATION

发明人： Shimpuku, Yoshihide ,  Nakagawa, Toshiyuki

IPC分类号： H03M5/14 ,  G11B20/14

CPC分类号： G11B20/1426 ,  H03M5/145 ,  H04N5/9261 ,  H04N5/945

摘要： There is disclosed a modulating system (30) for converting data of a basic data length of m bits into a variable length code (d, k; m, n; r) of a basic code length of n bits, which comprises the steps of: judging a binding length i ( i=1∼r ) of the basic data; uniformly converting data of m×i bits into a code of n×r bits by using a conversion table for converting data of m×r bits where the binding length i is the maximum binding length r, and including at least one conversion table where the binding length i is less than r; and taking out specific bits from the code of n×r bits thus obtained on the basis of the judged binding length i to output them as a modulation code. Further, there is also disclosed a demodulating system (40) for converting, in reverse direction, a variable length code (d, k; m, n; r) of a basic code length of n bits into data of a basic data length of m bits, comprising the steps of: judging a binding length i of the variable length code; uniformly converting, in reverse direction, a variable length code of n×i bits into data of m×r bits by a reverse conversion table for converting, in reverse direction, a variable length code of n×r bits where the binding length i is the maximum binding length r, and including at least one reverse conversion table where the binding length i is less than r; and taking out specific bits from data thus obtained on the basis of the judged binding length i to output it as reproduction data.

摘要翻译： 公开了一种用于将m位的基本数据长度的数据转换为n位基本码长度的可变长度码（d，k; m，n; r）的调制系统（30），其包括以下步骤： ：判断基本数据的绑定长度i（i = 1 SIMILAR r） 通过使用用于转换mxr位的数据的转换表将mxi位的数据均匀地转换成n×r位的码，其中绑定长度i是最大绑定长度r，并且包括至少一个转换表，其中绑定长度i小于 R等 并根据所判定的绑定长度i从这样获得的n×r比特的码中取出特定的比特，以输出它们作为调制码。 此外，还公开了一种解调系统（40），用于将n比特的基本码长度的可变长度码（d，k; m，n; r）反向转换成基本数据长度的数据 m比特，包括以下步骤：判断可变长度码的绑定长度i; 通过反向转换表将nxi位的可变长度码以相反方向均匀地转换成mxr位的数据，用于在相反方向上转换nxr位的可变长度码，其中绑定长度i是最大绑定长度r， 并且包括至少一个反向转换表，其中绑定长度i小于r; 并且根据所判定的绑定长度i从由此获得的数据中取出特定比特，以将其输出为再现数据。

公开(公告)号：EP0121384A1

公开(公告)日：1984-10-10

申请号：EP84301986.0

申请日：1984-03-23

申请人： SONY CORPORATION

发明人： Shimpuku, Yoshihide

IPC分类号： G11B5/52

CPC分类号： G11B5/09 ,  G11B5/488 ,  G11B5/534 ,  G11B5/56

摘要： In a magnetic recording device, digital data is recorded with higher density in such a manner that plural recording tracks (5) are sequentially formed on a magnetic recording medium (4). Any two adjoining tracks (5a, 5b) are formed by separate magnetic heads (3a, 3b) whose azimuth angles are equal to +θ, -θ, with the absolute value of the angle 6 being selected to satisfy the relationship 16°≦0≦22°, in a manner such that the crosstalk level between any two neighbouring tracks may be reduced without affecting the signal-to-noise ratio.

摘要翻译： 在磁记录装置中，数字数据以更高密度记录，使得在磁记录介质（4）上依次形成多个记录磁道（5）。 任何两个相邻的轨道（5a，5b）由方位角等于+θ，θ的独立磁头（3a，3b）形成，其中角度θ的绝对值被选择以满足关系16° = 0

公开(公告)号：EP1052625A3

公开(公告)日：2002-05-02

申请号：EP00303944.3

申请日：2000-05-10

申请人： SONY CORPORATION

发明人： Shimpuku, Yoshihide ,  Okazaki, Yutaka ,  Ino, Hiroyuki ,  Higashino, Satoru

IPC分类号： G11B5/48 ,  G11B5/60

CPC分类号： G11B5/6005 ,  G11B5/4826

摘要： A magnetic recording/reproducing apparatus is disclosed with which levitation of the magnetic head can be prevented in case of the speed of rotation of the magnetic disc is raised when a recording/reproducing is performed, the recording density and the transfer rate can furthermore be raised and the amount of abrasion of the magnetic head can be reduced. When a recording/reproducing operation with respect to a magnetic disc is performed, a magnetic disc is rotated by a spindle motor. A magnetic head included in a head structure supported by a suspension is operated to perform recording/reproducing with respect to the magnetic discs. At this time, the head structure is supported such that a load which is exerted from the head structure on the magnetic disc satisfies a range from 75 mgf to 500 mgf. Since the load which is exerted from the head structure on the magnetic disc is specified, the amount of abrasion of the magnetic head can be reduced, a stable state of contact between the magnetic disc and the head structure can be maintained and the recording density and the transfer rate can be raised.

摘要翻译： 公开了一种磁记录/再现装置，当执行记录/再现时，在磁盘的旋转速度升高的情况下可以防止磁头的悬浮，可以进一步提高记录密度和传送速率 并且可以降低磁头的磨损量。 当执行关于磁盘的记录/再现操作时，磁盘由主轴电动机旋转。 包括在由悬架支撑的头部结构中的磁头被操作以执行关于磁盘的记录/再现。 此时，头部结构被支撑为使得从头部结构施加在磁盘上的负载满足从75mgf至500mgf的范围。 由于规定了从磁头结构向磁盘施加的载荷，所以能够降低磁头的磨损量，可以保持磁盘与磁头结构的稳定的接触状态，并且记录密度和 可以提高转移率。

公开(公告)号：EP0923077A1

公开(公告)日：1999-06-16

申请号：EP98310098.3

申请日：1998-12-09

申请人： SONY CORPORATION

发明人： Nakagawa, Toshiyuki ,  Shimpuku, Yoshihide

IPC分类号： G11B20/14 ,  H03M5/14

CPC分类号： H03M7/46 ,  G11B20/1426 ,  G11B2020/1457 ,  H03M5/145

摘要： A DSV bit is inserted in an input data string by a DSV bit determining insertion unit. A modulation unit has a conversion table, and the element of the conversion table comprises the element for determining uniquely, and has a conversion rule that residues obtained by dividing the number of "1" in the element of a data string and the number of "1" in the element of a code word string to be converted by 2 are identically 1 or 0 for both residues. A channel bit string is modulated according to the conversion table, and further NRZI modulated by an NRZI modulation unit. Thus, DSV control can be performed with reduced redundancy.

摘要翻译： 通过DSV位确定插入单元将DSV位插入到输入数据串中。 调制单元具有转换表，并且转换表的元素包括用于唯一地确定的元素，并且具有转换规则，即通过将数据串的元素中的“1”数除以“ 要转换为2的代码字串的元素中的“1”对于两个残基都相同地为1或0。 根据转换表调制通道位串，并且由NRZI调制单元进一步调制NRZI。 因此，可以以减少的冗余来执行DSV控制。

公开(公告)号：EP0617517A3

公开(公告)日：1995-07-19

申请号：EP94104213.7

申请日：1994-03-17

申请人： SONY CORPORATION

发明人： Shimpuku, Yoshihide ,  Nakagawa, Toshiyuki

IPC分类号： H03M5/14 ,  G11B20/14

CPC分类号： G11B20/1426 ,  H03M5/145 ,  H04N5/9261 ,  H04N5/945

摘要： There is disclosed a modulating system (30) for converting data of a basic data length of m bits into a variable length code (d, k; m, n; r) of a basic code length of n bits, which comprises the steps of: judging a binding length i ( i=1∼r ) of the basic data; uniformly converting data of m×i bits into a code of n×r bits by using a conversion table for converting data of m×r bits where the binding length i is the maximum binding length r, and including at least one conversion table where the binding length i is less than r; and taking out specific bits from the code of n×r bits thus obtained on the basis of the judged binding length i to output them as a modulation code. Further, there is also disclosed a demodulating system (40) for converting, in reverse direction, a variable length code (d, k; m, n; r) of a basic code length of n bits into data of a basic data length of m bits, comprising the steps of: judging a binding length i of the variable length code; uniformly converting, in reverse direction, a variable length code of n×i bits into data of m×r bits by a reverse conversion table for converting, in reverse direction, a variable length code of n×r bits where the binding length i is the maximum binding length r, and including at least one reverse conversion table where the binding length i is less than r; and taking out specific bits from data thus obtained on the basis of the judged binding length i to output it as reproduction data.

公开(公告)号：EP0836186A2

公开(公告)日：1998-04-15

申请号：EP97307977.5

申请日：1997-10-08

申请人： SONY CORPORATION

发明人： Nakagawa, Toshiyuki ,  Ino, Hiroyuki ,  Yoshimura, Shunji ,  Kai, Shinichi ,  Shimpuku, Yoshihide ,  Iida, Michihiko ,  Kawashima, Tetsuji ,  Sato, Shoji

IPC分类号： G11B20/14 ,  G11B20/10

CPC分类号： G11B20/1426 ,  G11B20/10009

摘要： If there is any portion in channel bit data obtained on converting a signal read out from a recording medium into a bilevel signal which fails to satisfy a condition concerning a minimum run length or a maximum run length of the same symbol, the channel bit data is corrected to improve the bit error rate to secure a skew margin. To this end, channel bit data not satisfying a minimum run length d' of the same symbol is detected by a (d'-1) detector 4 using n-tupled clocks obtained on n-tupling channel clocks of playback data by a bit clock generator 2, where n is an integer not less than 2. A correction position of the channel bit data having the run length of the same symbol equal to (d'-1) is designated by a correction bit position designating unit 5. A data correction unit 6 then corrects the channel bit data so that the minimum run length of the same symbol will be equal to d'.

摘要翻译： 如果在将从记录介质读出的信号转换成不能满足与相同符号的最小游程长度或最大游程长度有关的条件的双电平信号中获得的通道位数据中存在任何部分，则通道位数据 校正以提高误码率以确保偏斜裕度。 为此，由（d'-1）检测器4检测不满足相同符号的最小游程长度d'的通道位数据，其使用通过位时钟的重放数据的n个tupling通道时钟获得的n个元组时钟 发生器2，其中n是不小于2的整数。具有相同符号的游程长度等于（d'-1）的通道位数据的校正位置由校正位位置指定单元5指定。数据 校正单元6然后校正通道位数据，使得相同符号的最小游程长度将等于d'。