公开(公告)号：US08284648B2

公开(公告)日：2012-10-09

申请号：US11940392

申请日：2007-11-15

申请人： Koichiro Nishimura ,  Junya Iizuka ,  Manabu Katsuki ,  Takakiyo Yasukawa

发明人： Koichiro Nishimura ,  Junya Iizuka ,  Manabu Katsuki ,  Takakiyo Yasukawa

IPC分类号： G11B27/30 ,  G11B3/00

CPC分类号： G11B20/10009 ,  G11B7/00458 ,  G11B20/10055 ,  G11B20/18

摘要： An optical disk apparatus is provided that has a signal processing circuit for equalizing a signal so as to achieve predetermined equalization, in which interference between codes is permitted, by means of an adaptive equalization circuit or the like, and for performing binarization by means of a maximum likelihood decoding circuit in which interference is performed as a rule, and thereby achieves stabilized signal reproduction in a narrow-band transmission. When evaluating the quality of the recorded signal through the use of the recording parameter learning and the reproduction system such as recorded signal verification, the optical disk recording apparatus is capable of highly precisely evaluating the quality of the recorded signal by fixing a circuit characteristic after suspending the optimization operation of the adaptive equalization circuit or the like for optimizing the characteristic by the reproduced signal. An optical disk recording method is also provided.

摘要翻译： 提供一种具有信号处理电路的光盘装置，该信号处理电路用于对信号进行均衡，以便通过自适应均衡电路等实现允许代码之间的干扰的预定均衡，并且借助于 通常执行干扰的最大似然解码电路，从而在窄带传输中实现稳定的信号再现。 通过使用记录参数学习和诸如记录信号验证的再现系统来评估记录信号的质量时，光盘记录装置能够通过固定暂停后的电路特性来高精度地评估记录信号的质量 用于通过再现信号优化特性的自适应均衡电路等的优化操作。 还提供了一种光盘记录方法。

公开(公告)号：US20110032806A1

公开(公告)日：2011-02-10

申请号：US12788899

申请日：2010-05-27

申请人： Shinji FUJITA ,  Takakiyo Yasukawa ,  Kenji Akahoshi ,  Koichiro Nishimura

发明人： Shinji FUJITA ,  Takakiyo Yasukawa ,  Kenji Akahoshi ,  Koichiro Nishimura

IPC分类号： G11B20/10

CPC分类号： G11B20/1252 ,  G11B7/0037 ,  G11B7/00456 ,  G11B7/00736 ,  G11B2007/0013 ,  G11B2020/1265 ,  G11B2220/2541

摘要： An optical disc recording method for recording disc information to be used in recording/reproducing control on an optical disc, comprises the following steps of: providing a first disc information unit and a second disc information unit, each having a predetermined data size, in a predetermined management information area of the optical disc; the disc information includes write strategy information; separating the write strategy information into first write strategy information and second write strategy information; recording the first disc information into the first disc information unit; and recording the second disc information into the second disc information unit.

摘要翻译： 一种用于记录用于在光盘上进行记录/再现控制的盘信息的光盘记录方法，包括以下步骤：在第一盘信息单元和第二盘信息单元中，每个具有预定的数据大小 光盘的预定管理信息区域; 盘信息包括写策略信息; 将写入策略信息分离成第一写入策略信息和第二写入策略信息; 将第一盘信息记录到第一盘信息单元中; 并将第二盘信息记录到第二盘信息单元中。

公开(公告)号：US20080137520A1

公开(公告)日：2008-06-12

申请号：US11751753

申请日：2007-05-22

申请人： Takakiyo Yasukawa ,  Koichi Watanabe ,  Koichiro Nishimura

发明人： Takakiyo Yasukawa ,  Koichi Watanabe ,  Koichiro Nishimura

IPC分类号： G11B7/00

CPC分类号： G11B7/1267 ,  G11B7/00456 ,  G11B7/0062

摘要： A recording and reproducing method has a recording pulse generating step of generating a recording pulse to set timing of a beam emitted from a laser according to data to be recorded on an information recording medium; a laser power control step of controlling a laser drive current according to a recording laser power; a beam detecting step of detecting a power of the beam emitted from the laser; a signal detecting step of detecting a signal level of a reproduction signal read out from the information recording medium; a step of binarizing the reproduction signal to generate a binarized signal; a step of generating a data signal synchronized with a reference clock signal with use of the binarized signal; and a step of detecting a shift in time interval between the binarized signal and the reference clock signal and feeding the shift back to the recording pulse.

摘要翻译： 记录和再现方法具有记录脉冲产生步骤，根据要记录在信息记录介质上的数据产生记录脉冲，以设定从激光发射的光束的定时; 激光功率控制步骤，根据记录激光功率来控制激光驱动电流; 光束检测步骤，用于检测从激光器发射的光束的功率; 信号检测步骤，检测从信息记录介质读出的再现信号的信号电平; 将再现信号二值化以生成二值化信号的步骤; 使用二值化信号产生与参考时钟信号同步的数据信号的步骤; 以及检测二值化信号和参考时钟信号之间的时间间隔的偏移并将移位返回到记录脉冲的步骤。

公开(公告)号：US20060280082A1

公开(公告)日：2006-12-14

申请号：US11367700

申请日：2006-03-06

申请人： Takakiyo Yasukawa

发明人： Takakiyo Yasukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/08511 ,  G11B7/13925 ,  G11B19/127 ,  G11B2007/0013

摘要： The number of the layers of a disk is determined based on focus search to be performed after at least two kinds of spherical aberration correction quantities are set.

摘要翻译： 基于在设置至少两种球面像差校正量之后要执行的焦点搜索来确定盘的层数。

公开(公告)号：US20060274624A1

公开(公告)日：2006-12-07

申请号：US11504572

申请日：2006-08-14

申请人： Tsuyoshi Toda ,  Takakiyo Yasukawa

发明人： Tsuyoshi Toda ,  Takakiyo Yasukawa

IPC分类号： G11B7/0045

CPC分类号： G11B7/0062 ,  G11B7/00456 ,  G11B20/1426 ,  G11B2020/1288 ,  G11B2220/2541

摘要： The mark-length recording system whereby information is recorded by changing the lengths of a recorded portion and an unrecorded or erased portion has a problem that, when new information is recorded in an already recorded region, the newly recorded information may deteriorate in reliability because the length and width of the newly recorded mark are different from those of the previously recorded mark and a part may exist that is not completely erased at the time of overwriting. The invention widens a setting freedom of the recording power and controls the length and width of the recorded mark by making the effective recording pulse length (the length from a rise of a first pulse to a fall of a last pulse) satisfy a relation: (effective recording pulse length)

摘要翻译： 通过改变记录部分和未记录或擦除部分的长度来记录信息的标记长度记录系统具有这样的问题，即当新信息被记录在已经记录的区域中时，新记录的信息可能劣化可靠性，因为 新记录的标记的长度和宽度与先前记录的标记的长度和宽度不同，并且可能存在在重写时未完全擦除的部分。 本发明通过使有效记录脉冲长度（从第一脉冲的上升到最后脉冲的下降的长度）满足以下关系来扩大记录功率的设定自由度并控制记录标记的长度和宽度： 有效记录脉冲长度）<（记录码长度，即要记录的数据长度）-2 T（参考时钟周期的两倍）。

公开(公告)号：US07130256B2

公开(公告)日：2006-10-31

申请号：US10268570

申请日：2002-10-09

申请人： Tsuyoshi Toda ,  Takakiyo Yasukawa

发明人： Tsuyoshi Toda ,  Takakiyo Yasukawa

IPC分类号： G11B7/0045

CPC分类号： G11B7/0062 ,  G11B7/00456 ,  G11B20/1426 ,  G11B2020/1288 ,  G11B2220/2541

摘要： The mark-length recording system whereby information is recorded by changing the lengths of a recorded portion and an unrecorded or erased portion has a problem that, when new information is recorded in an already recorded region, the newly recorded information may deteriorate in reliability because the length and width of the newly recorded mark are different from those of the previously recorded mark and a part may exist that is not completely erased at the time of overwriting. The invention widens a setting freedom of the recording power and controls the length and width of the recorded mark by making the effective recording pulse length (the length from a rise of a first pulse to a fall of a last pulse) satisfy a relation: (effective recording pulse length)

摘要翻译： 通过改变记录部分和未记录或擦除部分的长度来记录信息的标记长度记录系统具有这样的问题，即当新信息被记录在已经记录的区域中时，新记录的信息可能劣化可靠性，因为 新记录的标记的长度和宽度与先前记录的标记的长度和宽度不同，并且可能存在在重写时未完全擦除的部分。 本发明通过使有效记录脉冲长度（从第一脉冲的上升到最后脉冲的下降的长度）满足以下关系来扩大记录功率的设定自由度并控制记录标记的长度和宽度： 有效记录脉冲长度）<（记录码长度，即要记录的数据长度）-2T（参考时钟周期的两倍）。

公开(公告)号：US20060023590A1

公开(公告)日：2006-02-02

申请号：US11190840

申请日：2005-07-28

申请人： Toshiki Ishii ,  Tsuyoshi Toda ,  Masaaki Kurebayashi ,  Takakiyo Yasukawa

发明人： Toshiki Ishii ,  Tsuyoshi Toda ,  Masaaki Kurebayashi ,  Takakiyo Yasukawa

IPC分类号： G11B19/00 ,  G11B7/12

CPC分类号： G11B7/00375 ,  G11B7/0045 ,  G11B7/0948 ,  G11B7/1263

摘要： An optical disc recording and reproducing apparatus are provided in which even if a focusing error signal fluctuates suddenly by surface deflection or an obstacle such as scratch or dust on the surface of an optical disc, an effective recording laser power does not decrease but proper recording, erasure, and reproduction can be executed. An ordinary laser power for recording and a laser power for defocus, that is, a laser power larger than the ordinary recording laser power by a predetermined magnification are preset into a laser driver. In the normal case where a focusing error lies within a predetermined range, the former laser power is used. When the focusing error exceeds the predetermined range and the effective laser power is decreased by the defocus, the latter laser power is used.

摘要翻译： 提供了一种光盘记录和再现装置，其中即使聚焦误差信号由于表面偏转或光盘表面上的划痕或灰尘等障碍物而突然变化，有效的记录激光功率也不会下降，而是适当的记录， 可以执行擦除和再现。 用于记录的普通激光功率和用于散焦的激光功率，即，比普通记录激光功率大的预定倍率的激光功率被预设为激光驱动器。 在聚焦误差在预定范围内的正常情况下，使用前一激光功率。 当聚焦误差超过预定范围并且通过散焦降低有效激光功率时，使用后一激光功率。

公开(公告)号：US09286929B2

公开(公告)日：2016-03-15

申请号：US12570106

申请日：2009-09-30

申请人： Harukazu Miyamoto ,  Koichi Watanabe ,  Yutaka Nagai ,  Koichiro Nishimura ,  Takakiyo Yasukawa

发明人： Harukazu Miyamoto ,  Koichi Watanabe ,  Yutaka Nagai ,  Koichiro Nishimura ,  Takakiyo Yasukawa

IPC分类号： G11B7/007 ,  G11B7/1267 ,  G11B7/24038 ,  G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/1267 ,  G11B7/24038 ,  G11B2007/0013

摘要： A method for performing recording on a multilayered optical disk which has three or more recordable or rewritable information recording layers with a first recording layer and a second recording layer located nearer to a light incident surface than the first recording layer, and which respectively has a first test area configured by a plurality of segments in the first recording layer and in the second recording layer, wherein a predetermined radial distance L is defined beforehand. When an arbitrary segment in the second test area is test-recorded, a segment in the first test area, the radial distance of which from the recorded test area in the second test area is within the range of the predetermined radial distance L, is set as a segment in which test recording is not performed.

摘要翻译： 一种用于在具有三个或更多个可记录或可重写信息记录层的多层光盘上执行记录的方法，所述信息记录层具有位于比第一记录层更靠近光入射表面的第一记录层和第二记录层，并且分别具有第一 测试区域由第一记录层和第二记录层中的多个段构成，其中预先定义预定的径向距离L. 当对第二测试区域中的任意段进行测试记录时，将第一测试区域中与第二测试区域中记录的测试区域的径向距离设置在预定的径向距离L的范围内的段被设置 作为不执行测试记录的段。

公开(公告)号：US08335140B2

公开(公告)日：2012-12-18

申请号：US13179620

申请日：2011-07-11

申请人： Manabu Shiozawa ,  Takakiyo Yasukawa

发明人： Manabu Shiozawa ,  Takakiyo Yasukawa

IPC分类号： G11B15/04

CPC分类号： G11B7/00736 ,  G11B7/24038 ,  G11B2007/0013

摘要： The present invention provides a multilayer optical disc and an optical disc drive which can identify recording layers without performing tracking servo control or changing the structure of the disc. In a multilayer optical disc 100, the recording layer includes a layer identification region 101 having a recording pattern for layer identification, the layer identification region 101 including a layer specific region 102 having a specific pattern and a common region 103 having a common pattern different from the specific pattern, the layer specific region 102 being provided at a different radial position in each of the recording layers. The optical disc drive detects the layer specific region 102 having the specific pattern from the layer identification region 101 of the multilayer optical disc 100, and identifies the current layer based on the radial position of the layer specific region.

摘要翻译： 本发明提供一种多层光盘和光盘驱动器，其可以在不执行跟踪伺服控制或改变盘的结构的情况下识别记录层。 在多层光盘100中，记录层包括具有用于层识别的记录图案的层识别区域101，层识别区域101包括具有特定图案的层特定区域102和具有不同于 具体图案，层特定区域102设置在每个记录层中的不同径向位置处。 光盘驱动器从多层光盘100的层识别区域101检测具有特定图案的层特定区域102，并且基于层特定区域的径向位置识别当前层。

公开(公告)号：US20120075975A1

公开(公告)日：2012-03-29

申请号：US13198321

申请日：2011-08-04

申请人： Takakiyo YASUKAWA

发明人： Takakiyo YASUKAWA

IPC分类号： G11B7/125

CPC分类号： G11B7/00456

摘要： The invention prevents mark distortion during high-speed recording on an optical disc, thereby improving recording performance. A write pulse signal includes mark periods during which marks 201 are formed and space periods during which no marks are formed. Particular mark periods include a top pulse 101 having first write power Pw; a bias pulse 102 that follows the top pulse 101 and has bias power Pm lower than the first write power Pw; and a last pulse 103 that follows the bias pulse 102 and has second write power Pl lower than the first write power Pw.

摘要翻译： 本发明防止光盘高速记录时的标记失真，从而提高记录性能。 写入脉冲信号包括形成标记201的标记周期和不形成标记的空间周期。 特定的标记周期包括具有第一写入功率Pw的顶部脉冲101; 偏置脉冲102，其跟随顶部脉冲101并且具有低于第一写入功率Pw的偏置功率Pm; 以及跟随偏置脉冲102并且具有低于第一写入功率Pw的第二写入功率P1的最后脉冲103。