公开(公告)号：US20070091774A1

公开(公告)日：2007-04-26

申请号：US11562023

申请日：2006-11-21

申请人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

发明人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

IPC分类号： G11B7/24

CPC分类号： G11B27/3027 ,  G11B7/005 ,  G11B7/006 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/24082 ,  G11B7/24085 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/1217 ,  G11B20/14 ,  G11B20/1403 ,  G11B20/1426 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B2020/1239 ,  G11B2020/1245 ,  G11B2020/1267 ,  G11B2020/1274 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2020/1295 ,  G11B2020/1298 ,  G11B2020/1465 ,  G11B2220/216 ,  G11B2220/2537 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A signal can be detected based on a level slice system and detection delay time can be reduced by setting the recording density of a header field in a linear direction lower (coarse) than that of a user data recording field. Further, a signal can be detected based on the level slice system and detection delay time can be reduced by using a mark position form having a large detection margin as an information recording system of the header field. A readout error of a sector number due to a detection error is compensated for by recording address marks AM for attaining byte synchronization of the header field in both of a head portion and tail portion of information recorded in the header field.

摘要翻译： 可以基于电平切片系统检测信号，并且可以通过将报头字段的记录密度设置为比用户数据记录区域低的（粗略）的线性方向来减小检测延迟时间。 此外，可以基于电平切片系统检测信号，并且可以通过使用具有较大检测余量的标记位置形式作为标题字段的信息记录系统来减少检测延迟时间。 通过记录地址标记AM来补偿由于检测错误引起的扇区号的读出错误，以便在标题字段中记录的信息的头部和尾部中的头部字段的两个字段同步中获得字节同步。

公开(公告)号：US20070076572A1

公开(公告)日：2007-04-05

申请号：US11562263

申请日：2006-11-21

申请人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

发明人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

IPC分类号： G11B7/24

CPC分类号： G11B27/3027 ,  G11B7/005 ,  G11B7/006 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/24082 ,  G11B7/24085 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/1217 ,  G11B20/14 ,  G11B20/1403 ,  G11B20/1426 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B2020/1239 ,  G11B2020/1245 ,  G11B2020/1267 ,  G11B2020/1274 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2020/1295 ,  G11B2020/1298 ,  G11B2020/1465 ,  G11B2220/216 ,  G11B2220/2537 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A signal can be detected based on a level slice system and detection delay time can be reduced by setting the recording density of a header field in a linear direction lower (coarse) than that of a user data recording field. Further, a signal can be detected based on the level slice system and detection delay time can be reduced by using a mark position form having a large detection margin as an information recording system of the header field. A readout error of a sector number due to a detection error is compensated for by recording address marks AM for attaining byte synchronization of the header field in both of a head portion and tail portion of information recorded in the header field.

公开(公告)号：US20070070872A1

公开(公告)日：2007-03-29

申请号：US11561712

申请日：2006-11-20

申请人： Yutaka OKAMOTO ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

发明人： Yutaka OKAMOTO ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

IPC分类号： G11B7/24

CPC分类号： G11B27/3027 ,  G11B7/005 ,  G11B7/006 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/24082 ,  G11B7/24085 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/1217 ,  G11B20/14 ,  G11B20/1403 ,  G11B20/1426 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B2020/1239 ,  G11B2020/1245 ,  G11B2020/1267 ,  G11B2020/1274 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2020/1295 ,  G11B2020/1298 ,  G11B2020/1465 ,  G11B2220/216 ,  G11B2220/2537 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A signal can be detected based on a level slice system and detection delay time can be reduced by setting the recording density of a header field in a linear direction lower (coarse) than that of a user data recording field. Further, a signal can be detected based on the level slice system and detection delay time can be reduced by using a mark position form having a large detection margin as an information recording system of the header field. A readout error of a sector number due to a detection error is compensated for by recording address marks AM for attaining byte synchronization of the header field in both of a head portion and tail portion of information recorded in the header field.

公开(公告)号：US20060262688A1

公开(公告)日：2006-11-23

申请号：US11493798

申请日：2006-07-27

申请人： Chosaku Noda ,  Yutaka Kashihara ,  Yutaka Okamoto ,  Hideo Ando ,  Koichi Hirayama

发明人： Chosaku Noda ,  Yutaka Kashihara ,  Yutaka Okamoto ,  Hideo Ando ,  Koichi Hirayama

IPC分类号： G11B7/00

CPC分类号： G11B7/005 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10212 ,  G11B20/10296 ,  G11B20/10425

摘要： A reproduction signal evaluation method of this invention includes the step of obtaining a reproduction signal from an information recording medium on which digital information is recorded with record marks having different sizes, the step of obtaining the amplitude of a first reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the maximum size, the step of obtaining the amplitude of a second reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the second smallest size, the step of obtaining an evaluation value from the ratio of the amplitudes of the first and second reproduction signals, and the step of evaluating a characteristic of the reproduction signal on the basis of the evaluation value.

公开(公告)号：US20060114782A1

公开(公告)日：2006-06-01

申请号：US11328132

申请日：2006-01-10

申请人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

发明人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

IPC分类号： G11B5/09 ,  G11B7/24

CPC分类号： G11B27/3027 ,  G11B7/005 ,  G11B7/006 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/24082 ,  G11B7/24085 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/1217 ,  G11B20/14 ,  G11B20/1403 ,  G11B20/1426 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B2020/1239 ,  G11B2020/1245 ,  G11B2020/1267 ,  G11B2020/1274 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2020/1295 ,  G11B2020/1298 ,  G11B2020/1465 ,  G11B2220/216 ,  G11B2220/2537 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A signal can be detected based on a level slice system and detection delay time can be reduced by setting the recording density of a header field in a linear direction lower (coarse) than that of a user data recording field. Further, a signal can be detected based on the level slice system and detection delay time can be reduced by using a mark position form having a large detection margin as an information recording system of the header field. A readout error of a sector number due to a detection error is compensated for by recording address marks AM for attaining byte synchronization of the header field in both of a head portion and tail portion of information recorded in the header field.

公开(公告)号：US07012873B2

公开(公告)日：2006-03-14

申请号：US11059386

申请日：2005-02-17

申请人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

发明人： Yutaka Okamoto ,  Hideo Ando ,  Chosaku Noda ,  Yutaka Kashihara

IPC分类号： G11B5/09

CPC分类号： G11B27/3027 ,  G11B7/005 ,  G11B7/006 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/013 ,  G11B7/24082 ,  G11B7/24085 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/1217 ,  G11B20/14 ,  G11B20/1403 ,  G11B20/1426 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B2020/1239 ,  G11B2020/1245 ,  G11B2020/1267 ,  G11B2020/1274 ,  G11B2020/1277 ,  G11B2020/1278 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2020/1294 ,  G11B2020/1295 ,  G11B2020/1298 ,  G11B2020/1465 ,  G11B2220/216 ,  G11B2220/2537 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A signal can be detected based on a level slice system and detection delay time can be reduced by setting the recording density of a header field in a linear direction lower (coarse) than that of a user data recording field. Further, a signal can be detected based on the level slice system and detection delay time can be reduced by using a mark position form having a large detection margin as an information recording system of the header field. A readout error of a sector number due to a detection error is compensated for by recording address marks AM for attaining byte synchronization of the header field in both of a head portion and tail portion of information recorded in the header field.

公开(公告)号：US06785210B2

公开(公告)日：2004-08-31

申请号：US09826907

申请日：2001-04-06

申请人： Chosaku Noda ,  Yutaka Kashihara ,  Yutaka Okamoto ,  Hideo Ando ,  Koichi Hirayama

发明人： Chosaku Noda ,  Yutaka Kashihara ,  Yutaka Okamoto ,  Hideo Ando ,  Koichi Hirayama

IPC分类号： G11B700

CPC分类号： G11B7/005 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10212 ,  G11B20/10296 ,  G11B20/10425

摘要： A reproduction signal evaluation method of this invention includes the step of obtaining a reproduction signal from an information recording medium on which digital information is recorded with record marks having different sizes, the step of obtaining the amplitude of a first reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the maximum size, the step of obtaining the amplitude of a second reproduction signal, of the signals contained in the reproduction signal, which reflects digital information recorded with a record mark having the second smallest size, the step of obtaining an evaluation value from the ratio of the amplitudes of the first and second reproduction signals, and the step of evaluating a characteristic of the reproduction signal on the basis of the evaluation value.

摘要翻译： 本发明的再现信号评估方法包括以下步骤：从其中记录数字信息的信息记录介质获得具有不同尺寸的记录标记的步骤，获得包含的信号的第一再现信号的幅度 在再现信号中，其反映用具有最大尺寸的记录标记记录的数字信息，获得包含在再现信号中的信号的第二再现信号的幅度的步骤，该信号反映用记录有记录标记的数字信息 第二最小尺寸，从第一和第二再现信号的幅度的比值获得评估值的步骤，以及基于评估值评估再现信号的特性的步骤。

公开(公告)号：US06704259B2

公开(公告)日：2004-03-09

申请号：US09888597

申请日：2001-06-26

申请人： Yutaka Kashihara ,  Yutaka Okamoto ,  Chosaku Noda ,  Hideo Ando ,  Koichi Hirayama

发明人： Yutaka Kashihara ,  Yutaka Okamoto ,  Chosaku Noda ,  Hideo Ando ,  Koichi Hirayama

IPC分类号： G11B2010

CPC分类号： G11B20/10101 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/10111 ,  G11B20/10296 ,  G11B20/10481 ,  G11B20/1426 ,  G11B20/1833

摘要： There are provided a modulation table, a selector, and a counter. The modulation table is used for creating a plurality of modulation data candidates with respect to a mixture of user data and training data. The selector selects modulation data candidates. The counter counts DSVs for the selected modulation data and controls the selector. The DSV output from this counter is set to a specified value by keeping a state in which the training data is input.

摘要翻译： 提供了调制表，选择器和计数器。 调制表用于创建关于用户数据和训练数据的混合的多个调制数据候选。 选择器选择调制数据候选。 计数器计数所选调制数据的DSV，并控制选择器。 通过保持输入训练数据的状态，将该计数器的DSV输出设置为指定值。

公开(公告)号：US20080205212A1

公开(公告)日：2008-08-28

申请号：US12039648

申请日：2008-02-28

申请人： Takehiro Hiramatsu ,  Hideaki Ohsawa ,  Kazuo Watabe ,  Chosaku Noda ,  Naoki Morishita ,  Akihito Ogawa ,  Kazuto Kuroda ,  Nobuaki Kaji

发明人： Takehiro Hiramatsu ,  Hideaki Ohsawa ,  Kazuo Watabe ,  Chosaku Noda ,  Naoki Morishita ,  Akihito Ogawa ,  Kazuto Kuroda ,  Nobuaki Kaji

IPC分类号： G11B7/004

CPC分类号： G11B7/1359 ,  G11B7/0908 ,  G11B7/1275 ,  G11B7/131 ,  G11B7/1378 ,  G11B7/1381 ,  G11B7/13922 ,  G11B7/24

摘要： According to one embodiment, an optical head device provides a signal processing circuit which sets a control amount to move an objective lens so that a distance between the objective lens and a given recording layer of the an optical disc coincides with a focal position, an optical path length correction mechanism which corrects an influence of an aberration component producing an error in the focal distance, a thickness difference detection circuit which finds an amount of correction to be made by the optical path length, and an aberration correction circuit which generates a correction signal to correct the influence of the aberration component producing the error in the focal distance detected by the thickness difference detection circuit, and supplies the correction signal to the optical path length correction mechanism.

摘要翻译： 根据一个实施例，光学头装置提供信号处理电路，其设置控制量以移动物镜，使得物镜与光盘的给定记录层之间的距离与焦点位置一致，光学 路径长度校正机构，其校正产生焦距误差的像差分量的影响;求出由光程长度求出的校正量的厚度差检测电路;以及产生校正信号的像差校正电路 以校正产生由厚度差检测电路检测的焦距的误差的像差分量的影响，并将校正信号提供给光路长度校正机构。

公开(公告)号：US07292522B2

公开(公告)日：2007-11-06

申请号：US10762001

申请日：2004-01-22

申请人： Yuji Nagai ,  Chosaku Noda ,  Akihito Ogawa ,  Kazuto Kuroda

发明人： Yuji Nagai ,  Chosaku Noda ,  Akihito Ogawa ,  Kazuto Kuroda

IPC分类号： G11B7/24 ,  G11B5/09

CPC分类号： G11B27/24 ,  G11B7/0053 ,  G11B7/24082 ,  G11B20/025 ,  G11B20/1217 ,  G11B2020/1268 ,  G11B2020/1287 ,  G11B2020/1298 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562 ,  G11B2220/257 ,  G11B2220/2575

摘要： Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the number of wobble waves and M=2N). The sync signal with such configuration (6 wobbles per bit) is recorded on the head side of the address information (12 wobbles per bit). In this way, even when external noise is large, a modulated wobble signal can be demodulated more accurately.

摘要翻译： 地址信息由每个位的M个摆动（整数M是摆动波数）作为基本单位形成，并且被NRZ记录。 此外，用于地址信息的同步检测的同步信号由每位N个摆动形成为基本单位（整数N是摆动波数，M = 2N）。 具有这种配置的同步信号（每位6个摆动）被记录在地址信息的头侧（每位12个摆动）。 以这种方式，即使当外部噪声大时，可以更精确地解调调制的摆动信号。