公开(公告)号：US07848200B2

公开(公告)日：2010-12-07

申请号：US11624862

申请日：2007-01-19

申请人： Kaoru Okamoto ,  Jun Sumioka ,  Masakuni Yamamoto

发明人： Kaoru Okamoto ,  Jun Sumioka ,  Masakuni Yamamoto

IPC分类号： G11B20/10 ,  G11B27/36 ,  G11B5/09

CPC分类号： G11B20/20 ,  G11B20/10009

摘要： A method of reproducing multilevel information using a light spot. The multilevel information is recorded by defining virtual cells at regular intervals on tracks of an optical information recording medium and varying sizes of information pits in the cells. The method includes the steps of obtaining cell boundary values, each of the cell boundary values being obtained by performing sampling when the center of the light spot reaches a boundary between adjacent cells, calculating cell boundary value metrics on the basis of the cell boundary values and prestored reference values for the cell boundary values, calculating path metrics on the basis of the cell boundary value metrics, selecting a path metric having a minimum value of the path metrics, and reproducing the multilevel information on the basis of the path metric having the minimum value of the path metrics.

摘要翻译： 使用光点再现多级信息的方法。 通过在光信息记录介质的轨道上以规则的间隔定义虚拟单元并且在单元中定义不同大小的信息凹坑来记录多级信息。 该方法包括以下步骤：获得单元格边界值，每个单元格边界值是通过当光点的中心到达相邻单元格之间的边界时执行采样而获得的，基于单元边界值计算单元边界值度量;以及 预先存储的单元边界值的参考值，基于单元边界值度量计算路径度量，选择具有路径度量的最小值的路径度量，以及基于具有最小值的路径度量再现多级信息 路径度量的值。

公开(公告)号：US20070171800A1

公开(公告)日：2007-07-26

申请号：US11624862

申请日：2007-01-19

申请人： Kaoru Okamoto ,  Jun Sumioka ,  Masakuni Yamamoto

发明人： Kaoru Okamoto ,  Jun Sumioka ,  Masakuni Yamamoto

IPC分类号： G11B20/10

CPC分类号： G11B20/20 ,  G11B20/10009

摘要： In a method of reproducing multilevel information, cell-boundary values are obtained. Each of the cell-boundary values is obtained when the center of a light spot comes at a boundary between adjacent cells. Then, on the basis of the cell-boundary values and prestored reference values for the cell-boundary value, cell-boundary-value metrics are calculated. Furthermore, on the basis of the cell-boundary-value metrics, path metrics are calculated.

摘要翻译： 在再现多级信息的方法中，获得了单元格边界值。 当光点的中心位于相邻单元之间的边界时，获得每个单元格边界值。 然后，基于小区边界值和小区边界值的预存储参考值，计算小区边界值度量。 此外，基于小区边界值度量，计算路径度量。

公开(公告)号：US20100157781A1

公开(公告)日：2010-06-24

申请号：US12719119

申请日：2010-03-08

申请人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

发明人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

IPC分类号： G11B7/00

CPC分类号： G11B20/1496 ,  G11B7/005 ,  G11B20/10222 ,  G11B2220/2537

摘要： An optical information reproducing method of reproducing multivalued information recorded on a track of an optical information medium having a recording/reproducing region, which has virtual cells arranged thereon at regular spacings, the multivalued information being recorded thereon by changing a length of an information pit in a track direction or an area of the information pit in a cell with the use of a light spot, and the multivalued information being reproduced by detecting the level of a multistage reproduced signal from the information pit. The method includes detecting a cell center value of the central cell among three continuous cells recorded with an M-value (M

摘要翻译： 一种光学信息再现方法，用于再现记录在具有记录/再现区域的光学信息介质的轨道上的多值信息，该信息介质具有以规则间隔布置在其上的虚拟单元，通过改变信息凹坑的长度来记录多值信息 使用光点的单元中的信息凹坑的轨道方向或区域，并且通过从信息坑检测多级再现信号的电平来再现多值信息。 该方法包括：以记录有N值（N≥3）的多个单元中的每个单元上的M值（M

公开(公告)号：US07738338B2

公开(公告)日：2010-06-15

申请号：US11765058

申请日：2007-06-19

申请人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

发明人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

IPC分类号： G11B5/09 ,  G11B7/00

CPC分类号： G11B20/1496 ,  G11B7/005 ,  G11B20/10222 ,  G11B2220/2537

摘要： An optical information reproducing method of reproducing multivalued information recorded on a track of an optical information medium having a recording/reproducing region, which has virtual cells arranged thereon at regular spacings. The multivalued information is recorded thereon by changing a length of an information pit in a track direction or an area of the information pit in a cell with the use of a light spot. The multivalued information is reproduced by detecting the level of a multistage reproduced signal from the information pit. The method includes sampling a reproduced signal in the multivalued information recorded in one cell with an M-value (M

摘要翻译： 一种光学信息再现方法，用于再现记录在具有记录/再现区域的光学信息介质的轨道上的多值信息，其具有以规则间隔布置在其上的虚拟单元。 通过使用光点改变单元格中的信息凹坑的轨道方向或信息凹坑的区域的长度来记录多值信息。 通过从信息坑检测多级再现信号的电平来再现多值信息。 该方法包括以M值（M

公开(公告)号：US07593302B2

公开(公告)日：2009-09-22

申请号：US11549759

申请日：2006-10-16

申请人： Masakuni Yamamoto ,  Jun Sumioka ,  Kaoru Okamoto

发明人： Masakuni Yamamoto ,  Jun Sumioka ,  Kaoru Okamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/0062 ,  G11B7/24088

摘要： An optical information recording method includes the steps of irradiating laser light onto cells provided on a track of an optical information recording medium, recording on the optical information recording medium multilevel information including information of a level zero for which no information pit is formed, by changing, for each of the cells, widths in a track direction or sizes of information pits in the cells, and, for recording the information of a level zero, irradiating the laser light at a power that is greater than an erasing power for erasing the information pits and that does not permit formation of the information pits.

摘要翻译： 光信息记录方法包括以下步骤：将激光照射到设置在光信息记录介质的轨道上的单元上，在光信息记录介质上记录包含不形成信息凹坑的零电平的信息，通过改变 ，对于每个单元格，轨道方向上的宽度或单元格中的信息凹坑的大小，并且为了记录零电平的信息，以大于擦除功率的功率照射激光以擦除信息 坑并且不允许形成信息坑。

公开(公告)号：US20070091759A1

公开(公告)日：2007-04-26

申请号：US11549759

申请日：2006-10-16

申请人： Masakuni YAMAMOTO ,  Jun Sumioka ,  Kaoru Okamoto

发明人： Masakuni YAMAMOTO ,  Jun Sumioka ,  Kaoru Okamoto

IPC分类号： G11B7/0045

CPC分类号： G11B7/0062 ,  G11B7/24088

摘要： An optical information recording method includes the steps of irradiating laser light onto cells provided on a track of an optical information recording medium, recording on the optical information recording medium n-level multilevel information including information of level 0 for which no information pit is formed, by changing, for each of the cells, widths in a track direction or sizes of information pits in the cells, and, for recording the information of level 0, irradiating the laser light at a power that is greater than an erasing power for erasing the information pits and that does not permit formation of the information pits.

摘要翻译： 光信息记录方法包括以下步骤：将激光照射到设置在光信息记录介质的轨道上的单元上，在光信息记录介质上记录包含不形成信息凹坑的0级信息的n级多级信息， 通过针对每个单元格改变单元格中的轨道方向上的宽度或信息凹坑的尺寸，并且为了记录级别0的信息，以大于擦除功率的功率照射激光， 信息坑，不允许形成信息坑。

公开(公告)号：US07804754B2

公开(公告)日：2010-09-28

申请号：US11464294

申请日：2006-08-14

申请人： Masakuni Yamamoto ,  Jun Sumioka ,  Kaoru Okamoto

发明人： Masakuni Yamamoto ,  Jun Sumioka ,  Kaoru Okamoto

IPC分类号： G11B7/00

CPC分类号： G11B7/005 ,  G11B7/24088 ,  G11B20/10009 ,  G11B20/10046 ,  G11B2220/2537

摘要： In three consecutive cells consisting of a preceding cell, a center cell, and a subsequent cell, a possible change rate of the amplitude of a reproduced signal for the center cell with respect to the sum of the multiple values of the preceding and subsequent cells is obtained in advance. Then, for reproduction, the sum of the multiple values of the adjacent preceding and subsequent cells is obtained with respect to each cell. The amplitude of the reproduced signal obtained at the center cell is corrected to be closer to a reference value on the basis of the obtained change rate and sum.

摘要翻译： 在由先前的单元，中心单元和后续单元组成的三个连续单元中，中心单元的再现信号的振幅相对于前一单元的多个值之和的可能的变化率可以是 提前获得。 然后，对于再现，相对于每个单元获得相邻的前一个和后续单元的多个值的和。 基于获得的变化率和和来校正在中央单元处获得的再现信号的幅度，以更接近参考值。

公开(公告)号：US07706243B2

公开(公告)日：2010-04-27

申请号：US11622765

申请日：2007-01-12

申请人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

发明人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

IPC分类号： G11B7/24

CPC分类号： G11B20/10009 ,  G11B20/10027

摘要： An optical information reproducing method capable of determining multi-level information with high precision, and an apparatus for the method. Specifically, a cell having a reduced multi-level is provided in a portion of a data region to perform the level correction or automatic gain control. For example, a cell recorded with an M-value for each group including a plurality of cells, each of which is recorded with an N-value (N>3, M

摘要翻译： 一种能够高精度地确定多级信息的光学信息再现方法和该方法的装置。 具体地说，在数据区域的一部分中设置具有降低的多电平的单元，以执行电平校正或自动增益控制。 例如，提供了记录有包含多个单元的每个组的具有M值的单元，每个单元被记录有N值（N> 3，M

公开(公告)号：US20080056091A1

公开(公告)日：2008-03-06

申请号：US11836967

申请日：2007-08-10

申请人： Masakuni Yamamoto ,  Jun Sumioka ,  Kaoru Okamoto

发明人： Masakuni Yamamoto ,  Jun Sumioka ,  Kaoru Okamoto

IPC分类号： G11B20/14

CPC分类号： G11B20/1496 ,  G11B20/10212 ,  G11B2220/2537

摘要： A method of recording multivalued information by writing, by using a photo spot, an information pit on a virtual cell that is set on a track of an optical information recording medium, while changing a width of the information pit in the direction of the track, and of reproducing the multivalued information by detecting a level of the multistep reproduced signal from the information pit, includes: recording different pieces of multivalued information in a learning area of the optical information recording medium on a unit cell (predetermined number of cells) basis; sampling the reproduced signals of the multivalued information on the unit cell basis by using the photo spot; storing the reproduced signals in the sampled learning area on the unit cell basis; recording the multivalued information in a user data area of the optical information recording medium; sampling, by using the photo spots, the reproduced signals from the multivalued information recorded on the user data area; and reproducing the multivalued information in the user data area by comparing the reproducing signal of the learning area and the reproduced signal of the user data area.

摘要翻译： 通过使用光点在设置在光信息记录介质的轨道上的虚拟单元上写入信息凹坑，同时在轨道的方向上改变信息凹坑的宽度来记录多值信息的方法， 以及通过从信息坑检测多步再现信号的电平来再现多值信息，包括：在单位信元（预定的单元数）的基础上，在光学信息记录介质的学习区域中记录不同的多值信息; 通过使用光点对基于单元的多值信息的再现信号进行采样; 将所再现的信号存储在基于单元的采样学习区域中; 将所述多值信息记录在所述光信息记录介质的用户数据区中; 通过使用照片点对来自记录在用户数据区域上的多值信息的再现信号进行采样; 以及通过比较学习区域的再现信号和用户数据区域的再现信号来再现用户数据区域中的多值信息。

公开(公告)号：US20080013439A1

公开(公告)日：2008-01-17

申请号：US11765058

申请日：2007-06-19

申请人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

发明人： Jun Sumioka ,  Masakuni Yamamoto ,  Kaoru Okamoto

IPC分类号： G11B7/24

CPC分类号： G11B20/1496 ,  G11B7/005 ,  G11B20/10222 ,  G11B2220/2537

摘要： The present invention provides an information reproducing method which does not need to insert a special pit row for detecting a phase error but can extract phase error information for producing a reproduction clock from a reproduced signal. This method specifically includes: arranging a cell of a decreased multivalued degree having information recorded by one M-value (M

摘要翻译： 本发明提供一种不需要插入用于检测相位误差的特殊凹坑行的信息再现方法，但是可以从再现信号中提取用于产生再现时钟的相位误差信息。 该方法具体包括：将记录有一个M值（M = 3）; 当光点的中心到达由M值记录的单元的中心时对再现信号进行采样，并检测单元格中心值; 并且基于先前导出的小区中心值的理想值获得用于产生再现时钟的相位误差，在小区中心值的理想值附近的再现信号的先前导出的梯度和检测到的小区中心值 。