公开(公告)号：US20180254062A1

公开(公告)日：2018-09-06

申请号：US15902449

申请日：2018-02-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masaru KAIDA ,  Motoshi ITO ,  Daisuke SHIMODA ,  Naohiro KIMURA

IPC: G11B17/22 ,  G11B7/085 ,  G11B20/18

CPC classification number: G11B17/228 ,  G11B7/08517 ,  G11B7/0948 ,  G11B17/225 ,  G11B17/226 ,  G11B20/18 ,  G11B20/1889 ,  G11B23/0323 ,  G11B23/0328 ,  G11B27/002 ,  G11B2220/20 ,  G11B2220/40

Abstract: An optical disc apparatus includes: a controller configured to acquire information of an access result and access positions on an optical disc when an optical disc drive unit configured to optically access an optical disc optically accesses the optical disc; and a storage configured to store the information acquired by the controller.

公开(公告)号：US20170103780A1

公开(公告)日：2017-04-13

申请号：US15286324

申请日：2016-10-05

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Kohei NAKATA ,  Harumitsu MIYASHITA ,  Naohiro KIMURA

IPC: G11B7/007 ,  G11B20/12

CPC classification number: G11B7/00718 ,  G11B7/0037 ,  G11B7/0053 ,  G11B7/00736 ,  G11B7/00745 ,  G11B7/0938 ,  G11B20/1217 ,  G11B20/24 ,  G11B2020/1225 ,  G11B2020/1229 ,  G11B2020/1238 ,  G11B2020/1264 ,  G11B2020/1277 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2020/1298

Abstract: There are provided an optical disk and an optical disk recording method which are capable of stable data reading in a case where a recording linear density is increased. According to an optical disk of the present disclosure, a run-in pattern recorded in a groove track and a run-in pattern recorded in a land track are made different patterns so that no great change is caused in the amplitude of an acquired signal due to interference between adjacent recording patterns, and thus, data may be stably read.

公开(公告)号：US20190237102A1

公开(公告)日：2019-08-01

申请号：US16260837

申请日：2019-01-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Naohiro KIMURA ,  Harumitsu MIYASHITA

IPC: G11B7/007 ,  G11B7/24094 ,  G11B7/28

Abstract: An optical disc recording device includes a data acquisition unit configured to acquire bitmap data corresponding to image information, an address information acquisition unit configured to acquire address information set in wobbles of an optical disc by wobble synchronization from the optical disc, a recording position determining unit configured to determine a recording position on the optical disc for recording the bitmap data using the address information, and a mark recording unit configured to form a recording mark corresponding to the bitmap data on the information recording track of the optical disc by applying a light beam having recording power to the recording position on the optical disc.

公开(公告)号：US20170194027A1

公开(公告)日：2017-07-06

申请号：US15468164

申请日：2017-03-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Harumitsu MIYASHITA ,  Naohiro KIMURA ,  Kohei NAKATA

IPC: G11B7/0055 ,  G11B20/10 ,  G11B7/005

CPC classification number: G11B7/0055 ,  G11B7/0037 ,  G11B7/00458 ,  G11B7/005 ,  G11B7/006 ,  G11B20/10 ,  G11B20/1024 ,  G11B2020/10851 ,  G11B2020/10898

Abstract: Upon receiving an erase command for data recorded in a write-once optical disc, an information recording device corrupts data in an information area (synchronization signal in Run-in, frame synchronization signal, address information and the like), in an erased area on the optical disc, in which information necessary for synchronization of reproducing data by overwriting the data in the information area with an erasing pattern. The erased area is specified by an erase starting position and a size of data to be erased. In this way, the information recording device erases the data in the erased area.

公开(公告)号：US20190279676A1

公开(公告)日：2019-09-12

申请号：US16292515

申请日：2019-03-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Harumitsu MIYASHITA ,  Naohiro KIMURA

IPC: G11B7/0037 ,  G11B7/0055

Abstract: In an information recording device, when receiving an erase command by a receiver, a controller erases data of an erased area by overwriting data in an information area, to corrupt the data in the information area, using an erasing pattern. The erased area is specified by an erase start position and a size of the data to be erased on the optical disc. The data in the information area is arranged as partial data in a series of data arranged in a direction of internal parity of error correction so that correction is disabled in both of a correction processing by the internal parity of the error correction and a correction processing by external parity of the error correction when the data in the information area is overwritten using the erasing pattern.