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公开(公告)号：US10223202B2
公开(公告)日：2019-03-05
申请号：US15864161
申请日：2018-01-08
Inventor： Kohei Nakata , Yuji Takagi
IPC: G06F11/10 , H03M13/00 , H03M13/29 , H03M13/19 , G06F3/06 , H03M13/35 , G11B7/005 , G11B20/10 , G11B20/12 , G11B20/18 , H03M13/15
Abstract: In an optical disc apparatus that records and reproduces data onto and from an optical disc in units of predetermined block, an information divider divides the data so as to reduce an amount of the data included in each of blocks when a recording state of the optical disc does not satisfy a predetermined criterion, and reproduces recording data in units of the block by adding sub-information including a value indicating the amount of the data included in each of the blocks. An error-correction encoder circuit encodes the recording data in a first error-correction code format, and a recorder converts encoded recording data into a recording signal, and records the recording signal onto the optical disc. A quality evaluator circuit produces an evaluation value indicating a recording quality based on a result of reproducing the recording signal recorded on the optical disc.
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公开(公告)号：US09741383B2
公开(公告)日：2017-08-22
申请号：US14666488
申请日：2015-03-24
Inventor： Kohei Nakata , Yasumori Hino , Harumitsu Miyashita , Junichi Minamino , Yoshihisa Takahashi
IPC: G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/0037 , G11B7/2407 , G11B20/12 , G11B7/24082
CPC classification number: G11B7/0053 , G11B7/0037 , G11B7/0045 , G11B7/00718 , G11B7/00736 , G11B7/0079 , G11B7/2407 , G11B7/24082 , G11B20/1217 , G11B20/1252 , G11B2007/00754 , G11B2020/1242 , G11B2020/1268 , G11B2020/1277 , G11B2020/1294
Abstract: A track of an optical disk is formed by wobbling and divided into zones, a clock ratio of a recording clock to a wobble clock is preset for each zone, a wobble signal is detected from the optical disk, the wobble clock is generated from the wobble signal, a present position is identified by reproducing ADIP indicating a position of the track from the wobble signal and the wobble clock, the recording clock is generated with respect to the wobble clock, a data address present position is identified from the present position, a start end position of the ADIP in a recording target zone, a start end position of the data address in the recording target zone, and the clock ratio, a recording start position is identified based on the data address present position; and the data is recorded from the recording start position of the recording target zone.
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公开(公告)号：US09680526B2
公开(公告)日：2017-06-13
申请号：US14964615
申请日：2015-12-10
Inventor： Junichi Minamino , Kohei Nakata
CPC classification number: H04B3/462 , G11B20/1024 , G11B20/1816
Abstract: A phase error detector includes an N counter configured to frequency-divide a first clock by N, and output a signal at predetermined timing, an M counter configured to frequency-divide a second clock by M, and output a signal at predetermined timing, a comparator configured to perform phase comparison between a phase when a value of the N counter is 0 and a phase when a value of the M counter is 0, and perform phase comparison between a phase when a value of the N counter is equal to a value obtained by dividing N into a substantially predetermined value and a phase when a value of the M counter is equal to a value obtained by dividing M into a substantially predetermined value and a synthetic circuit configured to generate a phase error, based on comparison results of the comparator.
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14.发明授权公开(公告)号：US09570102B2
公开(公告)日：2017-02-14
申请号：US15166112
申请日：2016-05-26
Inventor： Isao Kobayashi , Kohei Nakata , Yasumori Hino
IPC: G11B7/0045 , G11B20/10 , G11B7/006 , G11B7/1263 , G11B7/1267
CPC classification number: G11B7/00456 , G11B7/0045 , G11B7/0062 , G11B7/1263 , G11B7/1267 , G11B20/10009 , G11B20/10037 , G11B20/10194
Abstract: An information recording and reproducing apparatus including: a reproducing unit which generates a digital signal from an analog signal; a recording compensation unit which generates an expectation signal from the digital signal, detects a signal difference between the digital signal and the expectation signal, and adjusts a recording condition for recording the information; and a recording unit configured to record the information based on the recording condition. First recording compensation is performed for adjusting the recording condition using first recording where lengths of a preceding space and a succeeding space of a first recording mark and lengths of a preceding space and a succeeding space of a second recording mark are not in intersymbol interference; and second recording compensation is performed for adjusting the recording condition for the first recording mark using second recording data for changing a length of the second recording mark.
Abstract translation: 一种信息记录和再现装置，包括：再现单元，其从模拟信号产生数字信号; 从数字信号产生预期信号的记录补偿单元检测数字信号与期望信号之间的信号差，并调整用于记录信息的记录条件; 以及记录单元，被配置为基于记录条件记录信息。 执行第一记录补偿，以使用第一记录来调整记录条件，其中第一记录标记的前一个空间和后续空间的长度以及前一个空间的长度和第二个记录标记的后续空间的长度不在符号间干扰; 并且执行第二记录补偿，以使用用于改变第二记录标记的长度的第二记录数据来调整用于第一记录标记的记录条件。
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公开(公告)号：US09401172B2
公开(公告)日：2016-07-26
申请号：US14984143
申请日：2015-12-30
Inventor： Junichi Minamino , Harumitsu Miyashita , Kohei Nakata
IPC: G11B7/24 , G11B7/007 , G11B7/24079 , G11B7/24085
CPC classification number: G11B7/00718 , G11B7/0053 , G11B7/007 , G11B7/00745 , G11B7/24079 , G11B7/24082 , G11B7/24085 , G11B20/10 , G11B20/1217 , G11B27/3027 , G11B2007/00754
Abstract: An optical disc medium includes a land and a groove at which information can be recorded. A predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium. The address information unit of the land includes three or more address recording areas capable of recording address information. The address information is recorded on one area selected from among the three or more address recording areas. The address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove. The one area to be selected from among the three or more address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.
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Patent Agency Ranking
公开(公告)号：US10521297B2
公开(公告)日：2019-12-31
申请号：US15355735
申请日：2016-11-18
Inventor： Kohei Nakata , Yuji Takagi
IPC: G06F11/10 , H03M13/29 , H03M13/15 , H03M13/35 , H03M13/19 , H03M13/00 , G11B20/10 , G11B20/12 , G11B20/18 , G06F3/06 , G11B7/005
Abstract: In an optical disc apparatus that records and reproduces data onto and from an optical disc in units of predetermined block, an information divider divides the data so as to reduce an amount of the data included in each of blocks when a recording state of the optical disc does not satisfy a predetermined criterion, and reproduces recording data in units of the block by adding sub-information including a value indicating the amount of the data included in each of the blocks. An error-correction encoder circuit encodes the recording data in a first error-correction code format, and a recorder converts encoded recording data into a recording signal, and records the recording signal onto the optical disc. A quality evaluator circuit produces an evaluation value indicating a recording quality based on a result of reproducing the recording signal recorded on the optical disc.
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公开(公告)号：US10453490B2
公开(公告)日：2019-10-22
申请号：US16223698
申请日：2018-12-18
Inventor： Kohei Nakata , Tsuyoshi Nakasendo
IPC: G11B20/10 , G11B7/0045
Abstract: An optical disc device includes a first error correction coding circuit that codes the recording data according to a first error correction coding format, a second error correction coding circuit that codes the recording data according to a second error correction coding format, and a recorder that converts the recording data into a recording signal and records it on an optical disc. The second error correction coding format is different in an arrangement of the recording data from the first error correction coding format. The second error correction coding format is configured to generate a second parity code with a higher degree of redundancy. The recorder records the recording data coded by the first error correction coding circuit and only the second parity code in the recording data coded by the second error correction coding circuit.
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公开(公告)号：US10008236B2
公开(公告)日：2018-06-26
申请号：US15652787
申请日：2017-07-18
Inventor： Kohei Nakata , Harumitsu Miyashita
CPC classification number: G11B20/1217 , G11B2020/122 , G11B2020/1278
Abstract: An optical disk includes a disk management information area in which predetermined information is recorded in advance, and a recording system area in which information for identifying a recording system of the optical disk recorded in a predetermined position within a non-data area included in a recordable area is recorded. A method for accessing the optical disk is decided based on disk management information and the information for identifying a recording system.
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公开(公告)号：US09691426B2
公开(公告)日：2017-06-27
申请号：US14991239
申请日：2016-01-08
Inventor： Kohei Nakata , Harumitsu Miyashita
IPC: G11B7/24 , G11B7/007 , G11B20/12 , G11B7/24079 , G11B27/30 , G11B7/24085 , G11B7/00
CPC classification number: G11B7/0079 , G11B7/00736 , G11B7/00745 , G11B7/24079 , G11B7/24085 , G11B20/1217 , G11B27/3027 , G11B2007/0013 , G11B2007/00754
Abstract: According to an optical disc, a track, where data is recorded in predetermined block units, is formed by wobbling at a spatial period in accordance with a radial position, and the track is divided into zones in a radial direction. Data is recorded in each of the zones at a predetermined line density based on a ratio n/m of the number of bits of a bit pattern of recording data to one wavelength of wobbling. The optical disc includes a first area having one of the zones, a second area having one of the zones different from the one of the zones in the first area, and a line density of data different from a line density of data in the first area, and a BCA where a zone format identifier specifying a zone table defining a boundary position of each of the zones and the ratio n/m is recorded.
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公开(公告)号：US09454985B2
公开(公告)日：2016-09-27
申请号：US14641936
申请日：2015-03-09
Inventor： Junichi Minamino , Harumitsu Miyashita , Kohei Nakata
IPC: G11B7/24 , G11B7/007 , G11B20/10 , G11B7/24082 , G11B20/12 , G11B27/30 , G11B7/005 , G11B7/24079 , G11B7/24085
CPC classification number: G11B7/00718 , G11B7/0053 , G11B7/007 , G11B7/00745 , G11B7/24079 , G11B7/24082 , G11B7/24085 , G11B20/10 , G11B20/1217 , G11B27/3027 , G11B2007/00754
Abstract: An optical disc medium includes a land and a groove at which information can be recorded. A predetermined number of address information units which record address information of the land or groove are provided in a circumferential direction of the optical disc medium. The address information unit of the land includes three or more address recording areas capable of recording address information. The address information is recorded on one area selected from among the three or more address recording areas. The address information unit of the land has address information which is recorded, in the same modulation, on the side of the inner adjacent groove and on the side of the outer adjacent groove. The one area to be selected from among the three or more address recording areas for recording the address information of the land is different among three address information units adjacently arranged in a radial direction.
Abstract translation: 光盘介质包括可以记录信息的平台和凹槽。 在光盘介质的圆周方向上设置预定数量的地址信息单元，其记录地面或凹槽的地址信息。 地面的地址信息单元包括能够记录地址信息的三个以上的地址记录区域。 地址信息被记录在从三个或更多个地址记录区域中选择的一个区域上。 陆地的地址信息单元具有在相同的调制中在内相邻槽的侧面和外相邻槽的一侧记录的地址信息。 从用于记录土地的地址信息的三个或更多个地址记录区域中选择的一个区域在径向相邻布置的三个地址信息单元中是不同的。
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