公开(公告)号：EP2246855A4

公开(公告)日：2011-07-27

申请号：EP09714009

申请日：2009-02-27

Applicant: PANASONIC CORP

Inventor： MIYASHITA HARUMITSU ,  NAKATA KOHEI ,  HINO YASUMORI ,  KIMURA NAOHIRO

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

CPC classification number: G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10111 ,  G11B20/1012 ,  G11B20/10212 ,  G11B20/10277 ,  G11B20/10296 ,  G11B20/10361 ,  G11B20/1037 ,  G11B20/10398 ,  G11B20/10472 ,  G11B20/10481 ,  G11B20/1816 ,  G11B20/182 ,  G11B20/225 ,  G11B2220/2541

公开(公告)号：EP2341500A4

公开(公告)日：2012-05-02

申请号：EP09823257

申请日：2009-10-19

Applicant: PANASONIC CORP

Inventor： NAKAMURA ATSUSHI ,  MIYAGAWA NAOYASU ,  FURUMIYA SHIGERU ,  HINO YASUMORI ,  ITO MOTOSHI ,  SHOJI MAMORU ,  TAKAHASHI YOSHIHISA

IPC: G11B7/007 ,  G11B7/0045 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/24082

CPC classification number: G11B7/00736 ,  G11B7/0045 ,  G11B7/1267 ,  G11B7/24038 ,  G11B7/24082

Abstract: An information recording medium according to the present invention includes three or more information recording layers. Each of the plurality of information recording layers includes a test recording area usable for adjusting a recording condition. One of the plurality of information recording layers includes a reproduction-only management data area in which management data usable for managing the information recording medium is pre-recorded. One information recording layer includes a recordable management data area in which management data usable for managing the information recording medium is newly writable. Each of the other two or more information recording layers among the plurality of information recording layers includes a test recording area at a radial position overlapping the radial position of a part of the reproduction-only management data area. In the one recording layer including the recordable management data area, the recordable management data area is provided at two positions, i.e., one on the inner side and the other on the outer side to the test recording area.

公开(公告)号：EP1630802A4

公开(公告)日：2008-12-24

申请号：EP04735392

申请日：2004-05-28

Applicant: PANASONIC CORP

Inventor： OSHIMA MITSUAKI ,  HINO YASUMORI

IPC: G11B7/24 ,  G11B23/00

CPC classification number: G06K7/0008 ,  G11B7/24038 ,  G11B23/0042 ,  G11B27/105 ,  G11B27/11 ,  G11B27/24

Abstract: An optical disc according to the present invention includes a plurality of recording layers; a receiving section for receiving, from outside an optical disc, a switching instruction for switching a target layer to be targeted for recording layers; and a switching section for switching the target layer among the plurality of recording layers, based on the switching instruction received.

公开(公告)号：EP2450889A4

公开(公告)日：2015-01-07

申请号：EP10794270

申请日：2010-07-01

Applicant: SONY CORP ,  PANASONIC CORP ,  TDK CORP ,  HITACHI CONSUMER ELECTRONICS ,  SAMSUNG ELECTRONICS CO LTD

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

IPC: G11B7/007 ,  G11B7/0045 ,  G11B7/125 ,  G11B7/1267 ,  G11B7/24038

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

公开(公告)号：EP2360692A4

公开(公告)日：2014-08-27

申请号：EP09831663

申请日：2009-12-03

Applicant: PANASONIC CORP

Inventor： NAKAO MASAHITO ,  HINO YASUMORI ,  KOMMA YOSHIAKI ,  YAMASAKI FUMITOMO ,  SANO KOUSEI

IPC: G11B7/24038 ,  G11B7/005 ,  G11B7/007 ,  G11B7/125 ,  G11B7/1267

CPC classification number: G11B7/005 ,  G11B7/00736 ,  G11B7/1267 ,  G11B7/24038 ,  G11B2007/0013

Abstract: An information recording medium according to the present invention includes at least three information recording layers. If the readout power of a laser beam in reading information from an information recording layer L(n) is identified by Pw(n), and if the readout power of the laser beam in reading information from an information recording layer L(n+a) is identified by Pw(n+a), then a base thickness between the information recording layers is determined so that the intensity of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n) becomes equal to or lower than that of the light when the information recording layer L(n+a) is irradiated with a laser beam having the readout power Pw(n+a).

公开(公告)号：EP2058805A4

公开(公告)日：2011-03-09

申请号：EP07859699

申请日：2007-11-30

Applicant: PANASONIC CORP

Inventor： HINO YASUMORI ,  MIYASHITA HARUMITSU ,  SHOJI MAMORU ,  ITOU KIYOTAKA

IPC: G11B20/10 ,  G11B7/005 ,  G11B20/14

CPC classification number: G11B20/10009 ,  G11B20/10046 ,  G11B20/10111 ,  G11B20/10481 ,  G11B2020/122 ,  G11B2220/2541 ,  G11B2220/2562

公开(公告)号：EP1710790A4

公开(公告)日：2009-05-06

申请号：EP05709414

申请日：2005-01-27

Applicant: PANASONIC CORP

Inventor： SHOJI MAMORU ,  HINO YASUMORI ,  SATO TAKAHIRO ,  OKADA YUU

IPC: G11B7/0045 ,  G11B7/006 ,  G11B7/125

CPC classification number: G11B7/1267 ,  G11B7/00456 ,  G11B7/0062

Abstract: A recording power determination method for determining a recording power of an optical beam for recording data on an information storage medium includes the steps of recording test data on the information storage medium at a plurality of test recording powers; reading the test data recorded at each test recording power, generating a signal, and measuring a modulation factor of the signal corresponding to each test recording power; calculating a product of an n'th power of each test recording power and the corresponding modulation factor, thereby obtaining a plurality of products corresponding to the plurality of test recording powers, where n is a value of exponent and is a real number other than 1; calculating a first recording power based on the correlation between the plurality of test recording powers and the plurality of products; and calculating the recording power based on the first recording power.

公开(公告)号：EP1909280A4

公开(公告)日：2009-04-15

申请号：EP06781201

申请日：2006-07-18

Applicant: PANASONIC CORP

Inventor： SHOJI MAMORU ,  HINO YASUMORI ,  MIYASHITA HARUMITSU ,  KOBAYASHI ISAO

IPC: G11B20/18 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B20/10

CPC classification number: G11B7/1267 ,  G11B7/00456 ,  G11B7/0062

Abstract: An operation of a reliability value of |Pa-Pb|-Pstd of maximum-likelihood decoding results of a portion, which is equivalent to a start/end edge of a recording mark edge and has a high error generating probability in the maximum-likelihood decoding method, is performed for each combination of a prescribed mark length and a length of a space just before the mark, and for each combination of the mark length and a space just after the mark. Based on the operation results, a recording parameter is optimized, and recording is performed by having the optimized recording parameter reflected.