公开(公告)号：JP5309197B2

公开(公告)日：2013-10-09

申请号：JP2011231255

申请日：2011-10-21

Applicant: 日立コンシューマエレクトロニクス株式会社

Inventor： 悠介 中村 ,  孝一郎 西村 ,  浩行 峯邑 ,  貴弘 黒川

IPC: G11B20/18 ,  G11B7/0045 ,  G11B7/005 ,  G11B20/10

Abstract: PROBLEM TO BE SOLVED: To attain an efficient and reliable evaluation method of a reproduction signal and an optical disk drive using this method by solving such a problem that a circuit scale is index-likely increased in accordance with the increase of a constraint length of PRML system when Euclidean distance is calculated by determining coincidence of a binarization bit column and a predetermined evaluation bit column for evaluating quality of the reproduction signal in a large capacity optical disk system having the constraint length of 5 or larger. SOLUTION: The continuous number of 2T to be contained in the predetermined evaluation bit column is expressed as i, and the evaluation bit column is considered with respect to a bit column of length (5+2i), and a determination process is executed whether the predetermined evaluation bit column is contained in the binarization bit column. Error vectors to be obtained from a target signal corresponding to the evaluation bit column and a target signal formed from the binarization bit column are prepared to select one by a result of the determination process. Simultaneously, an equalization error vector, which is obtained from the target signal to be formed from the binarization bit column and the reproduction signal, is calculated and by computing an inner product of the equalization error vector and the selected error vector, the circuit scale required for evaluation of the reproduction signal can be reduced. COPYRIGHT: (C)2012,JPO&INPIT

公开(公告)号：JP2013206494A

公开(公告)日：2013-10-07

申请号：JP2012072749

申请日：2012-03-28

Applicant: Hitachi Consumer Electronics Co Ltd ,  日立コンシューマエレクトロニクス株式会社

Inventor： FUJITA KOJI

IPC: G11B7/004 ,  G11B7/0045

Abstract: PROBLEM TO BE SOLVED: To solve such a problem that in a grooveless optical disk including a guide layer having a physical groove structure for performing tracking servo control and a recording layer not having a groove structure in the recording layer performing the recording/reproducing of data, a positional deviation from the virtual track of the recording layer occurs due to the partial warpage and inclination of an optical disk, so that there is a possibility to reduce the continuity accuracy of a connection track position and degrade recording quality, in additional recording from a recording interruption position.SOLUTION: It is achieved by executing the stop of recording and the start of the additional recording in an address position on the optical disk where the relative tilt amount between an objective lens condensing light on the recording layer and the optical disk is a predetermined value or less. Further, it is achieved by executing the operation of taking out the optical disk, to inhibit the additional recording to the recording layer after the recording is interrupted.

Abstract translation: 要解决的问题为了解决这样一个问题，即在包括具有用于执行跟踪伺服控制的物理槽结构的引导层和在执行数据记录/再现的记录层中不具有凹槽结构的记录层的无槽光盘中 ，由于光盘的部分翘曲和倾斜而发生与记录层的虚拟轨迹的位置偏差，从而有可能降低连接轨道位置的连续性精度并降低记录质量， 记录中断位置。解决方案：通过在光盘上的地址位置执行记录的停止和附加记录的开始来实现，其中记录层上的物镜聚光灯与光盘之间的相对倾斜量 是预定值以下。 此外，通过执行取出光盘的操作来实现，以在记录被中断之后禁止对记录层的附加记录。

公开(公告)号：JP2013200914A

公开(公告)日：2013-10-03

申请号：JP2012068334

申请日：2012-03-23

Applicant: Taiyo Yuden Co Ltd ,  太陽誘電株式会社

Inventor： SHIMOMAI KENICHI ,  IMAMURA YUTAKA ,  ASANO SHO

IPC: G11B7/0045 ,  G11B7/004 ,  G11B7/007 ,  G11B7/135

Abstract: PROBLEM TO BE SOLVED: To accelerate the total recording speed when performing recording in a plurality of different recording layers of an optical disk by using a plurality of optical pickups.SOLUTION: In an optical recording method, with a predetermined position on a radius in a recording area of a disk having a plurality of recording layers as a boundary, an area on the inner peripheral side is defined as an angular velocity fixed control area, an area on the outer peripheral side is defined as a linear velocity fixed control area, and recording is performed in the plurality of recording layers by using a plurality of optical pickups. In the optical recording method, when the recording is performed simultaneously from the position on the inner peripheral side to the outer peripheral side from a predetermined position of a disk by using the plurality of optical pickups, the recording by an angular velocity fixed control system to the angular velocity fixed control area precedes, and the completed recording by the optical pickup is stopped. When the recording in the angular velocity fixed control area of the plurality of optical pickups is completed, it is switched to a linear velocity fixed control system.

Abstract translation: 要解决的问题：通过使用多个光学拾取器在光盘的多个不同记录层中进行记录时加速总记录速度。解决方案：在光学记录方法中，在 具有多个记录层的盘的记录区域作为边界，内周侧的区域被定义为角速度固定控制区域，外周侧的区域被定义为线速度固定控制区域，并且 通过使用多个光学拾取器在多个记录层中进行记录。 在光学记录方法中，当通过使用多个光学拾取器从盘的预定位置从内周侧到外周侧的位置同时进行记录时，通过角速度固定控制系统进行记录 角速度固定控制区域在前方，光拾取器完成的记录停止。 当在多个光学拾取器的角速度固定控制区域中的记录完成时，它被切换到线速度固定控制系统。

公开(公告)号：JP2013186914A

公开(公告)日：2013-09-19

申请号：JP2012049914

申请日：2012-03-07

Applicant: Hitachi Consumer Electronics Co Ltd ,  日立コンシューマエレクトロニクス株式会社

Inventor： IIZUKA JUNYA ,  SUZUKI MOTOYUKI

IPC: G11B7/007 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/24 ,  G11B7/24041

Abstract: PROBLEM TO BE SOLVED: To provide a grooveless disk medium capable of accurately performing layer discrimination by easily forming a pattern for enabling layer discrimination in each recording layer before recording data on a recording layer of a disk, a recording and playback method and a recording and playback device.SOLUTION: In an optical disk having a plurality of recording layers without the presence of a guide groove structure and a guide layer having a guide groove structure, a layer discrimination pattern capable of discriminating a recording layer is recorded at a predetermined position of at least one of the innermost peripheral side and the outermost peripheral side of each recording layer. Further, the layer discrimination pattern is made to be a repeated pattern having a different period in each recording layer, and layer discrimination is performed from the period of a signal obtained by scanning this area with a light spot.

Abstract translation: 要解决的问题：提供一种无槽盘介质，其能够在将记录在盘的记录层上的数据，记录和再现方法以及记录之前容易地形成用于在每个记录层中进行层鉴别的图案，从而准确地进行层鉴别 播放装置。解决方案：在具有多个记录层而不存在引导槽结构的光盘和具有引导槽结构的引导层的光盘中，能够识别记录层的层识别图案被记录在 每个记录层的最内周侧和最外周侧中的至少一个。 此外，层识别模式被做成在每个记录层中具有不同周期的重复图案，并且从通过用光斑扫描该区域而获得的信号的周期执行层鉴别。

公开(公告)号：JP5293678B2

公开(公告)日：2013-09-18

申请号：JP2010106406

申请日：2010-05-06

Applicant: ソニー株式会社

Inventor： 芳和 高島 ,  元樹 加藤

IPC: G11B20/12 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/085 ,  G11B20/10 ,  G11B27/00 ,  G11B27/034

CPC classification number: G11B27/034 ,  G11B20/10527 ,  G11B20/1217 ,  G11B27/105 ,  G11B2007/0013 ,  G11B2020/10537 ,  G11B2020/10722 ,  G11B2020/10759 ,  G11B2020/10944 ,  G11B2220/235 ,  G11B2220/2541 ,  G11B2220/2562

Abstract: There is provided an apparatus and a method for generating record data, guaranteeing seamless playback even in a case of occurrence of a jump. In a multilayer disc having a plurality of recording layers, it is configured that an allowable range of an intra-layer jump and an inter-layer jump carried out in a playback processing of an information recording medium is determined and a required time for the intra-layer jump and the inter-layer jump is calculated on the basis of the determined allowable jump range information so as to determine a data configuration requirement such as an allowable minimum consecutive data size of data to be stored in the information recording medium on the basis of the calculated required jump time. With the present structure, seamless playback is made possible even in a case of occurrence of not only an intra-layer jump but also an inter-layer jump.

公开(公告)号：JP2013182631A

公开(公告)日：2013-09-12

申请号：JP2012044516

申请日：2012-02-29

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKAMURO HIDEYUKI ,  NAGATOMO TAKASHI ,  ANDO HIDEKI ,  SUZUKI YUICHI

IPC: G11B7/0045 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09

Abstract: PROBLEM TO BE SOLVED: To prevent seek speed from decreasing for a recording medium including a recording layer without pre-address.SOLUTION: When recording is performed on a recording medium including a recording layer to which an address is provided along with the recording of main information, and a reference plane to which an address is provided along with the formation of a position guide, correspondence relation information for identifying a substantial correspondence relation between a recording layer address and a reference plane address is created based on the recording layer address provided to the recording layer along with the recording of the main information and the reference plane address detected when the recording layer address is provided to the recording layer, and the correspondence relation information is recorded in the recording medium. When a required target recording layer address is accessed, a beam spot of a laser beam with which the recording layer as a target is irradiated can be positioned in the vicinity of the target recording layer address by executing seek for the reference plane address identified by the correspondence relation information and the target recording layer address. As a result, a decrease in the seek speed is effectively prevented.

Abstract translation: 要解决的问题：为了防止对包括不具有预寻址的记录层的记录介质的寻道速度降低。解决方案：当在包括提供地址的记录层的记录介质上执行记录以及主要记录时 信息，以及与形成位置指南一起提供地址的参考平面，基于提供给记录层地址的记录层地址创建用于识别记录层地址和参考平面地址之间的实质对应关系的对应关系信息 记录层以及当记录层地址被提供给记录层时检测到的主信息和参考平面地址的记录，并且对应关系信息被记录在记录介质中。 当访问所需的目标记录层地址时，可以通过对由目标记录层地址识别的参考平面地址执行寻找而将目标记录层地址附近的激光束的束斑定位在目标记录层地址附近 对应关系信息和目标记录层地址。 结果，有效地防止了寻道速度的降低。

公开(公告)号：JP2013164885A

公开(公告)日：2013-08-22

申请号：JP2012026897

申请日：2012-02-10

Applicant: Sony Corp ,  ソニー株式会社

Inventor： NAKAMURO HIDEYUKI ,  NAGATOMO TAKASHI ,  IRIYAMA TOSHIHISA

IPC: G11B7/007 ,  G11B7/0045 ,  G11B20/12 ,  G11B27/00

Abstract: PROBLEM TO BE SOLVED: To prevent infinite linkage from being generated for a recording destination of prespiral recording management information when recording a prespiral to be needed at the start of writing data in a recording medium for which a position guide is not formed in a recording layer.SOLUTION: A preformat area is provided as a pre-recording track formation area of double pitch for a recording layer, and management information is recorded by a laser beam for recording while applying tracking servo by a laser beam for adjacent track servo to the pre-recording track. When it is assumed that recording management information for a prespiral at the start of writing user data is recorded in a TDMA and recording management information for the a prespiral at the start of writing TDMA is recorded in another location, the TDMA prespiral recording management information is recorded to such a preformat area.

Abstract translation: 要解决的问题：为了防止在记录在记录层中没有形成位置引导件的记录介质中写入数据时需要的预先手写记录的预先手写记录管理信息的无限制链接 。解决方案：作为记录层的双重间距的预记录磁道形成区域，提供了预格式化区域，并且通过用于记录的激光束来记录管理信息，同时通过用于相邻轨道伺服的激光束将跟踪伺服施加到预 记录轨道。 当假定在用户数据开始时用于预先写入的记录管理信息被记录在TDMA中并且在写入开始时用于预先写入的TDMA的记录管理信息被记录在另一个位置时，TDMA预先记录管理信息是 记录到这样的预格式区域。

公开(公告)号：JP5252039B2

公开(公告)日：2013-07-31

申请号：JP2011150809

申请日：2011-07-07

Applicant: ソニー株式会社

Inventor： 知孝 倉岡 ,  昭栄 小林 ,  光利 寺田

IPC: G11B20/12 ,  G11B7/0045 ,  G11B20/10 ,  G11B27/00 ,  G11B27/10 ,  H04N5/85

公开(公告)号：JPWO2011152029A1

公开(公告)日：2013-07-25

申请号：JP2011549785

申请日：2011-05-31

Applicant: パナソニック株式会社

Inventor： 藤畝　健司 ,  健司 藤畝 ,  山元　猛晴 ,  猛晴 山元

IPC: G11B7/1267 ,  G11B7/0045 ,  G11B7/1263

CPC classification number: G11B7/1267 ,  G11B7/0062

Abstract: 光ディスクの大容量化と高速記録に伴い、記録信号の周波数が高くなり、パルス幅が短くなる。パルス幅が短い信号でレーザを駆動する場合、光パルスの立ち上がり時間と下がり時間が大きくなると、光ディスクへの高速記録が困難となってしまう課題があった。ユーザデータ記録時に、ボトムの駆動電流を閾値以下の電流値である第2のボトムの駆動電流値に設定することで、光パルスの立ち上がり時間と立ち下がり時間を高速にすることが出来、光ディスクの高速記録を可能とする。

公开(公告)号：JPWO2011148460A1

公开(公告)日：2013-07-25

申请号：JP2012517013

申请日：2010-05-25

Applicant: 株式会社東芝

Inventor： 隆 碓井 ,  隆 碓井 ,  渡部　一雄 ,  一雄 渡部 ,  岡野　英明 ,  英明 岡野

IPC: G11B7/0065 ,  G03H1/04 ,  G11B7/0045 ,  G11B7/095 ,  G11B7/1263 ,  G11B7/1267

CPC classification number: G11B7/0065 ,  G11B7/083 ,  G11B7/09

Abstract: 可干渉性の光源151より出射される、記録される情報を含む情報光と情報光と同一波長である参照光とが干渉することにより、ホログラムとして情報が記録されるホログラム記録媒体130の変位を検出して変位信号を生成する。次に、一定時間ごとに変位信号をサンプリングし、一定間隔で区切った複数の範囲のそれぞれを階級として、前記変位信号のサンプリング値が該当する階級に度数を割り当てて該サンプリング値の頻度分布情報を計算する。次に、頻度分布情報から変位信号の変位の振幅範囲である許容変位範囲を決定し、ホログラム記録媒体130に情報の記録を開始するときに、変位信号のサンプリング値が許容変位範囲内にある場合は、ホログラム記録媒体130に情報の記録をおこない、変位信号のサンプリング値が許容変位範囲外にある場合は、情報光および参照光の少なくともどちらか一方を、情報がホログラム記録媒体130に記録されない光強度に減光または遮断する露光制御をおこなう。