公开(公告)号：JP2012069242A

公开(公告)日：2012-04-05

申请号：JP2012004330

申请日：2012-01-12

Applicant: Panasonic Corp ,  パナソニック株式会社

Inventor： KANEUMA YOSHIAKI ,  ANZAI JOJI ,  HINO YASUMORI ,  SANO AKIMASA ,  NAKADA HIDEKI ,  FUJIMOTO KEISUKE ,  YAMAMOTO TAKEHARU ,  SHIMAMOTO TAKESHI

IPC: G11B7/135 ,  G11B7/125

CPC classification number: G11B7/1381 ,  G11B7/1275 ,  G11B2007/0006 ,  G11B2007/0013

Abstract: PROBLEM TO BE SOLVED: To reduce interference by light of other layers when recording or reproducing information on an optical information medium having three or more recording layers by using light of a wavelength λ1 and to keep an S/N ratio high and excellent when reproducing information from the optical information medium by using light of a wavelength λ2 longer than the wavelength λ1.SOLUTION: A wavelength selection light shield region 7x is disposed at a position which is between a second beam splitter 6 and a light detector 9 and is a position at least intersecting the center parts of the luminous flux of light of a wavelength λ1 and light of a wavelength λ2, and is formed on a detection hologram 7.

Abstract translation: 要解决的问题：为了通过使用波长λ1的光来在具有三个或更多个记录层的光学信息介质上记录或再现信息时减少其他层的光的干扰并且保持S / N比高和优异 当通过使用长于波长λ1的波长λ2的光从光信息介质再现信息时。 解决方案：波长选择光屏蔽区域7x设置在第二分束器6和光检测器9之间的位置处，并且是至少与波长λ1的光束的光束的中心部分相交的位置 和波长λ2的光，并形成在检测全息图7上。版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2011023069A

公开(公告)日：2011-02-03

申请号：JP2009167198

申请日：2009-07-15

Applicant: Hitachi Consumer Electronics Co Ltd ,  Panasonic Corp ,  Sony Corp ,  ソニー株式会社 ,  パナソニック株式会社 ,  日立コンシューマエレクトロニクス株式会社

Inventor： MINEMURA HIROYUKI ,  KUROKAWA TAKAHIRO ,  SHIRAISHI JUNYA ,  KOBAYASHI SHOEI ,  MIYASHITA SEIJUN ,  HINO YASUMORI

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

CPC classification number: G11B20/10009 ,  G11B7/00456 ,  G11B7/00458 ,  G11B20/10046 ,  G11B20/1012 ,  G11B20/10481 ,  G11B2007/0013 ,  G11B2220/2541

Abstract: PROBLEM TO BE SOLVED: To provide a reproduced signal evaluation method and a write adjustment method for achieving a large-capacity Blu-ray disc and excellent media compatibility.
SOLUTION: An evaluation index L-SEAT is calculated through signed addition using a Euclidean distance difference calculated from at least one of target signals in which a focused edge is shifted to the right and left, and the quality of the reproduced signal is evaluated based on the evaluation index. Write condition adjustment using the index enables write adjustment not depending on SNR and achieving high adjustment accuracy.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供用于实现大容量蓝光盘的再现信号评估方法和写入调整方法，并且具有优异的介质兼容性。 解决方案：通过使用从聚焦边缘向右和向左移动的目标信号中的至少一个计算的欧几里德距离差，通过有符号相加来计算评估指数L-SEAT，并且再现信号的质量为 根据评价指标进行评估。 使用该索引的写入条件调整可以使写入调整不依赖于SNR并实现高调整精度。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2014075164A

公开(公告)日：2014-04-24

申请号：JP2012221889

申请日：2012-10-04

Applicant: Panasonic Corp ,  パナソニック株式会社

Inventor： TAKAGI YUJI ,  NAKADA KOHEI ,  NAKASENDO GO ,  HINO YASUMORI

IPC: G11B20/14 ,  G11B20/10 ,  H03M7/14

Abstract: PROBLEM TO BE SOLVED: To provide a digital modulation method capable of performing recording of higher density by achieving encoding efficiency higher than modulation encoding proposed in the conventional practice, a digital modulation device, a recording method, a recording medium, a digital demodulation method, and a digital demodulation device.SOLUTION: A 7-bit data word is converted into a 13-bit code word in which the minimum value of the number of continuous 0s sandwiched by 1 and 1 of a bit string of the converted code word is 2.

Abstract translation: 要解决的问题：提供一种能够通过实现比现有技术中提出的调制编码更高的编码效率来执行更高密度的记录的数字调制方法，数字调制装置，记录方法，记录介质，数字解调方法， 和数字解调装置。解决方案：将7位数据字转换为13位码字，其中被转换码字的位串中的1和1之间的连续0的数目的最小值为2 。

公开(公告)号：JP2011175733A

公开(公告)日：2011-09-08

申请号：JP2011106489

申请日：2011-05-11

Applicant: Panasonic Corp ,  パナソニック株式会社

Inventor： KANEUMA YOSHIAKI ,  ANZAI JOJI ,  TSUKUDA MASAHIKO ,  HINO YASUMORI

IPC: G11B7/26 ,  G11B7/135 ,  G11B7/24

CPC classification number: G11B7/24038 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13925 ,  G11B2007/0013

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical recording medium that can improve the quality of a servo signal and a reproduction signal, and to provide the optical recording medium. SOLUTION: When shape-wise thicknesses tr1, tr2, tr3, and tr4 of a cover layer 42, a first intermediate layer 43, a second intermediate layer 44, and a third intermediate layer 45 are converted into thicknesses t1, t2, t3, and t4 of the respective corresponding layers each having a predetermined refractive index no, a defocus amount with respect to a layer having a refractive index nrαand a thickness trα (1≤α≤n (α is a natural number and n is an integer of 4 or larger)) and a defocus amount with respect to a layer having the refractive index no and a thickness tα (1≤α≤n (α is a natural number and n is an integer of 4 or larger)) are equal to each other, and the thicknesses t1, t2, t3, and t4 satisfy ¾t1-(t2+t3+t4)¾≥1 μm, a difference between two values of the thicknesses t1, t2, t3, and t4 is set to ≥1 μm in any case, and ¾(t1+t2)-(t3+t4)¾≥1 μm. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 解决的问题：提供一种可以提高伺服信号的质量和再现信号的光记录介质的制造方法，并提供光记录介质。 解决方案：当覆盖层42，第一中间层43，第二中间层44和第三中间层45的成形厚度tr1，tr2，tr3和tr4被转换为厚度t1，t2， 各自相应的层具有预定折射率no的散焦量，相对于折射率nrα的层的散焦量和厚度trα（1≤α≤n（α是自然数，n是整数） （1≤α≤n（α为自然数，n为4以上的整数））的散焦量相对于折射率为no的层的散焦量为 彼此之间的厚度t1，t2，t3和t4满足¾t1（t2 + t3 + t4）¾≥1μm，厚度t1，t2，t3和t4的两个值之间的差被设定为≥1 ¾（t1 + t2） - （t3 + t4）¾≥1μm。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2011070733A

公开(公告)日：2011-04-07

申请号：JP2009221652

申请日：2009-09-25

Applicant: Hitachi Consumer Electronics Co Ltd ,  Panasonic Corp ,  Sony Corp ,  Tdk Corp ,  Tdk株式会社 ,  ソニー株式会社 ,  パナソニック株式会社 ,  日立コンシューマエレクトロニクス株式会社

Inventor： HINO YASUMORI ,  SHIRAISHI JUNYA ,  INOUE HIROYASU ,  WATANABE KOICHI

IPC: G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B7/24

CPC classification number: G11B7/00736 ,  G11B7/00456 ,  G11B7/0062

Abstract: PROBLEM TO BE SOLVED: To solve such a problem that it becomes impossible to record record pulse information on DI, and since result compatibility is damaged when the amount of recording and reproduction control information is increased by the expansion of the record pulse information by an increase of thermal interference caused by the heightening of the density of an information recording medium. SOLUTION: The record pulse information is made to be recordable on an existing DI region by dividing the record pulse information into the parameter information of 1 byte and a difference therefrom so as to reduce the number of data of the record pulse information. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了解决在DI上记录记录脉冲信息成为不可能的问题，并且由于当通过记录脉冲信息的扩展来增加记录和再现控制信息的量时结果兼容性被破坏 通过增加信息记录介质的密度而引起的热干扰。 解决方案：通过将记录脉冲信息划分为1字节的参数信息和与其相差的记录脉冲信息，可以将记录脉冲信息记录在现有的DI区域上，以减少记录脉冲信息的数据数量。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010140551A

公开(公告)日：2010-06-24

申请号：JP2008315521

申请日：2008-12-11

Applicant: Panasonic Corp ,  パナソニック株式会社

Inventor： FUJIMOTO KEISUKE ,  HINO YASUMORI ,  KIMURA NAOHIRO ,  NAKADA KOHEI

IPC: G11B20/18 ,  G11B7/004 ,  G11B20/14

Abstract: PROBLEM TO BE SOLVED: To solve the problem of a deterioration possibility of accuracy of an evaluation value in an evaluation index of a PRML system calculated by using a conventional fixed Euclid distance in adaptive viterbi having an internal reference level of viterbi decoding changed.
SOLUTION: In adaptive viterbi decoding having an internal reference level of viterbi decoding changed according to a playback signal, a difference between the changed reference level and a fixed reference level is extracted and, for dispersion of a difference metric obtained by using the changed reference level, normalization is performed for every patterns where Euclid distances are equal. Thus, a playback signal index not deteriorated in accuracy with respect to the change of the reference level is calculated while an increase in circuit scale is suppressed.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题为了解决在具有维特比解码的内部参考水平的适应性维特比中通过使用常规固定欧几里德距离计算的PRML系统的评估指标中的评估值的精度劣化的可能性降低的问题， 。 解决方案：在具有根据重放信号改变的维特比解码的内部参考电平的适应性维特比解码中，提取改变的参考电平和固定参考电平之间的差异，并且为了通过使用 改变参考水平，对于欧几里德距离相等的每个模式，执行归一化。 因此，在抑制电路规模的增加的同时，计算相对于基准电平的变化而不会降低精度的重放信号的索引。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2011014203A

公开(公告)日：2011-01-20

申请号：JP2009158453

申请日：2009-07-03

Applicant: Hitachi Consumer Electronics Co Ltd ,  Panasonic Corp ,  Samsung Electronics Co Ltd ,  Sony Corp ,  Tdk Corp ,  Tdk株式会社 ,  ソニー株式会社 ,  パナソニック株式会社 ,  三星電子株式会社Samsung Electronics Co.,Ltd. ,  日立コンシューマエレクトロニクス株式会社

Inventor： AKIMOTO YOSHIHIRO ,  KOBAYASHI SHOEI ,  ITO MOTOSHI ,  HINO YASUMORI ,  INOUE HIROYASU ,  MIYAMOTO JIICHI ,  NISHIMURA KOICHIRO ,  HWANG SUNG-HEE ,  HWANG IN-OH

IPC: G11B7/007 ,  G11B7/0045 ,  G11B7/125

CPC classification number: G11B7/1267 ,  G11B7/00736 ,  G11B7/24038 ,  G11B20/1217 ,  G11B2007/0013 ,  G11B2020/1275 ,  G11B2220/235 ,  G11B2220/2541

Abstract: PROBLEM TO BE SOLVED: To provide a suitable inner zone layout in an optical disc composed of three or more layers.SOLUTION: A test area is provided in each inner zone (inner circumferential side region) on each recording layer. The test areas of the recording layers are disposed such that the test areas do not overlap with each other in the layer direction. Not more than one management information recording and reproducing region overlaps in the layer direction, to the test areas of the recording layers on the side further towards a laser incoming surface than the test areas. Furthermore, the management information recording and reproducing region is disposed such that the management information recording and reproducing region does not overlap with the test areas of the recording layers in the layer direction on the disc substrate side.

Abstract translation: 要解决的问题：在由三层或更多层组成的光盘中提供合适的内部区域布局。解决方案：在每个记录层上的每个内部区域（内周侧区域）中设置测试区域。 记录层的测试区域被布置成使得测试区域在层方向上彼此不重叠。 不超过一个管理信息记录和再现区域在层方向上重叠到记录层的比测试区域更靠近激光入射表面的一侧的测试区域。 此外，管理信息记录和再现区域被布置成使得管理信息记录和再现区域与盘基板侧上的层方向上的记录层的测试区域不重叠。

公开(公告)号：JP2011014202A

公开(公告)日：2011-01-20

申请号：JP2009158452

申请日：2009-07-03

Applicant: Hitachi Consumer Electronics Co Ltd ,  Panasonic Corp ,  Samsung Electronics Co Ltd ,  Sony Corp ,  Tdk Corp ,  Tdk株式会社 ,  ソニー株式会社 ,  パナソニック株式会社 ,  三星電子株式会社Samsung Electronics Co.,Ltd. ,  日立コンシューマエレクトロニクス株式会社

Inventor： AKIMOTO YOSHIHIRO ,  KOBAYASHI SHOEI ,  ITO MOTOSHI ,  HINO YASUMORI ,  INOUE HIROYASU ,  MIYAMOTO JIICHI ,  NISHIMURA KOICHIRO ,  HWANG SUNG-HEE ,  HWANG IN-OH

IPC: G11B7/007 ,  G11B7/0045 ,  G11B7/125

CPC classification number: G11B7/00736 ,  G11B7/1267 ,  G11B7/24038

Abstract: PROBLEM TO BE SOLVED: To provide a suitable inner zone layout in a four-layer disc.SOLUTION: A test area is provided in the inner zone (inner circumferential side region) on each of the recording layers. When the two test areas on the outer circumferential side among four areas form a first pair and the two test areas on the inner circumferential side form a second pair, the test areas that form the first pair and the test areas that form the second pair are disposed not to overlap each other in the layer direction. The two test areas that configure the first pair have the same test area consumption direction, and the test areas are disposed such that regions to be subsequently used do not easily overlap each other. The two test areas that configure the second pair have the same test area consumption direction, which is the direction opposite to the test area consumption direction of the first pair, and the test areas are disposed such that regions to be subsequently used do not easily overlap each other.

Abstract translation: 要解决的问题：在四层盘中提供合适的内部区域布局。解决方案：在每个记录层上的内部区域（内周侧区域）中设置测试区域。 当四个区域中的外周侧的两个测试区域形成第一对，并且内周侧的两个测试区域形成第二对时，形成第一对的测试区域和形成第二对的测试区域是 被设置为不在层方向上彼此重叠。 配置第一对的两个测试区域具有相同的测试区域消耗方向，并且设置测试区域使得随后使用的区域不容易彼此重叠。 配置第二对的两个测试区域具有与第一对的测试区域消耗方向相反的方向相同的测试区域消耗方向，并且设置测试区域使得随后使用的区域不容易重叠 彼此。