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：US07808874B2

公开(公告)日：2010-10-05

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： 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 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：US07808873B2

公开(公告)日：2010-10-05

申请号：US12719112

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： 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 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 sampling reproduced signals in the multivalued information recorded in two continuous cells 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M值（M

公开(公告)号：US07778133B2

公开(公告)日：2010-08-17

申请号：US11689643

申请日：2007-03-22

申请人： Kaoru Okamoto ,  Jun Sumioka ,  Masakuni Yamamoto

发明人： Kaoru Okamoto ,  Jun Sumioka ,  Masakuni Yamamoto

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B7/24088 ,  G11B20/10027 ,  G11B20/10296 ,  G11B2220/2537 ,  H03M13/256

摘要： An optical information recording/reproducing apparatus is adapted to record and/or reproduce multilevel information on/or from an optical information recording medium. The multilevel information is recorded in the form of pits in cells virtually formed at regular intervals on a track. The respective levels are represented by varying the length or the area of information pits such that a reproduced signal has a different amplitude level depending on the length or the area of information pits. A reproduced signal correction circuit corrects a reproduced signal obtained by performing sampling at the center of each cell. An error power calculation circuit calculates error power on the basis of the difference between the corrected reproduced signal and an ideal value of each level of the cell. A decoder performs decoding on the basis of the calculated error power values.

摘要翻译： 光学信息记录/再现装置适于在/或从光学信息记录介质上记录和/或再现多级信息。 多电平信息以凹坑的形式记录在实际上以轨道上规则的间隔形成的单元格中。 相应的电平通过改变信息凹坑的长度或面积来表示，使得再现信号具有取决于信息凹坑的长度或面积的不同的幅度电平。 再现信号校正电路校正通过在每个单元的中心执行采样而获得的再现信号。 误差功率计算电路根据校正再生信号与单元电平的每个电平的理想值之间的差异来计算误差功率。 解码器基于计算的误差功率值来执行解码。

公开(公告)号：US20100165826A1

公开(公告)日：2010-07-01

申请号：US12719112

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 sampling reproduced signals in the multivalued information recorded in two continuous cells 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M值（M