-
公开(公告)号：US10068604B2
公开(公告)日：2018-09-04
申请号：US15468164
申请日：2017-03-24
IPC分类号： G11B7/0055 , G11B7/005 , G11B20/10 , G11B7/0045 , G11B7/0037 , G11B7/006
CPC分类号： G11B7/0055 , G11B7/0037 , G11B7/00458 , G11B7/005 , G11B7/006 , G11B20/10 , G11B20/1024 , G11B2020/10851 , G11B2020/10898
摘要： 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：US09978421B1
公开(公告)日：2018-05-22
申请号：US15784142
申请日：2017-10-15
IPC分类号： G11B20/18 , G11B7/24088 , G11B20/00
CPC分类号： G11B20/1883 , G11B7/00458 , G11B7/24088 , G11B20/00586 , G11B20/1879 , G11B20/1889
摘要： The optical disk device performs recording/reproducing of data by a predetermined recording block on the track of an optical disk. The device has a recording unit, an optical-head, and a failure detection unit. The recording unit generates a recording signal by modulating the data. The optical-head records data on the track by optical beam emission to the track according to the recording signal, and detects light reflected off the track and then generates a detection signal based on the reflected light. The failure detection unit detects an abnormal condition based on the detection signal changed from a normal condition. If the sum of duration of an abnormal condition in the recording block is equal to or greater than a first time-length, the failure detection unit determines that the recording block has a flaw.
-
公开(公告)号：US11295779B2
公开(公告)日：2022-04-05
申请号：US17281686
申请日：2019-11-08
发明人： Kohei Nakata , Yasushi Kobayashi
IPC分类号： G11B7/0045 , G11B20/10 , G11B20/12 , G11B20/18
摘要： The present disclosure provides an optical disk device capable of reproducing data recorded on a high linear density optical disk stably. The optical disk device according to the disclosure is characterized by being equipped with a recording expected waveform generation circuit which generates, at the time of recording, an expected waveform that is expected to be obtained at the time of decoding; and a recording pulse generation circuit which generates a recording pulse for driving a laser with power and a time width suitable for an amplitude value of the recording expected waveform for each sampling point of the recording expected waveform.
-
公开(公告)号：US09934815B2
公开(公告)日：2018-04-03
申请号：US15172579
申请日：2016-06-03
发明人： Kohei Nakata , Yasumori Hino
IPC分类号： G11B20/10 , G11B7/005 , G11B20/14 , G11B7/0037
CPC分类号： G11B20/10222 , G11B7/0037 , G11B7/005 , G11B20/10009 , G11B20/10037 , G11B20/10046 , G11B20/14
摘要： An optical disc apparatus includes a synchronizer that generates a reproduction clock signal synchronized with a reproduction signal of information recorded in an optical disc medium, and generates a digital reproduction signal synchronized with the reproduction clock signal, an adaptive equalizer that generates a post-adaptive-equalization digital reproduction signal, and a maximum likelihood decoder that performs maximum likelihood decoding of the post-adaptive-equalization digital reproduction signal to generate a binary signal. The apparatus also includes an expected waveform generator that generates an expected waveform from the binary signal, a phase-advance waveform generator that generates a phase-advance waveform, a phase-delay waveform generator that generates a phase-delay waveform, and a metric detector that detects a phase error. In the optical disc apparatus, the synchronizer controls the phase of the digital reproduction signal using the phase error.
-
公开(公告)号：US09495999B2
公开(公告)日：2016-11-15
申请号：US14964614
申请日：2015-12-10
发明人： Junichi Minamino , Kohei Nakata
IPC分类号： G11B7/0045 , G11B20/10 , G11B7/09 , G11B7/24082 , G11B7/005 , G11B20/12 , G11B7/007
CPC分类号： G11B20/1024 , G11B7/0053 , G11B7/0941 , G11B7/24082 , G11B20/10222 , G11B2007/00754 , G11B2020/1268
摘要： A phase error detector includes a sine wave generation circuit that generates a sine wave signal, based on a first input signal of a first period, a cosine wave generation circuit that generates a cosine wave signal, based on the first input signal, a first calculator that calculates a phase difference between the sine wave signal and a second input signal of a second period, a second calculator that calculates a phase difference between the cosine wave signal and the second input signal, and a first selection unit that outputs the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is within a predetermined range, and outputs a predetermined value having a same sign as a sign of the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is out of the predetermined range.
摘要翻译： 相位误差检测器包括基于第一周期的第一输入信号产生正弦波信号的正弦波产生电路，基于第一输入信号产生余弦波信号的余弦波生成电路，第一计算器 其计算正弦波信号和第二周期的第二输入信号之间的相位差，计算余弦波信号和第二输入信号之间的相位差的第二计算器，以及输出计算出的相位差的第一选择单元 当由第二计算器计算的相位差处于预定范围内时，通过第一计算器输出由第二计算器计算出的相位差为由第一计算器计算出的相位差的符号的相同符号的预定值， 超出预定范围。
-
6.发明授权公开(公告)号：US10002633B2
公开(公告)日：2018-06-19
申请号：US15286324
申请日：2016-10-05
CPC分类号： 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
摘要： 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：US09754619B1
公开(公告)日：2017-09-05
申请号：US15335835
申请日：2016-10-27
发明人： Kohei Nakata
IPC分类号： G11B7/09 , G11B7/005 , G11B7/13 , G11B20/18 , G11B7/1353 , G11B20/10 , G11B7/0037
CPC分类号： G11B7/094 , G11B7/0037 , G11B7/005 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/0943 , G11B7/13 , G11B7/1353 , G11B7/1381 , G11B20/10009 , G11B20/10388 , G11B20/10398 , G11B20/10462 , G11B20/18
摘要： In an optical disc apparatus for reproducing information recorded on a track of an optical disc, an optical head irradiates a light beam onto the track, detects a reflected light reflected by the track, and generates a reproduction signal based on the reflected light. A decoder circuit decodes the reproduction signal, and generates a decoded signal including information recorded on the track. A correlation detector circuit calculates a cross-correlation value between the reproduction signal and the decoded signal. A servo circuit detects a deviation amount of an irradiation position of the light beam onto the track, from the reproduction signal, and controls the irradiation position of the optical head based on the cross-correlation value and the deviation amount.
-
8.发明授权Optical disc capable of recording address information with the same modulation on sides of adjacent grooves 有权能够在相邻槽的侧面记录具有相同调制的地址信息的光盘公开(公告)号：US09495994B2
公开(公告)日：2016-11-15
申请号：US14984179
申请日：2015-12-30
IPC分类号： G11B7/24 , G11B7/007 , G11B20/10 , G11B7/24082 , G11B20/12 , G11B27/30 , G11B7/005 , G11B7/24079 , G11B7/24085
CPC分类号： G11B7/00718 , G11B7/0053 , G11B7/007 , G11B7/00745 , G11B7/24079 , G11B7/24082 , G11B7/24085 , G11B20/10 , G11B20/1217 , G11B27/3027 , G11B2007/00754
摘要： 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.
摘要翻译： 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地布置的三个地址信息单元中是不同的。
-
公开(公告)号：US11475918B2
公开(公告)日：2022-10-18
申请号：US17487303
申请日：2021-09-28
发明人： Yasushi Kobayashi , Kohei Nakata , Yasumori Hino
IPC分类号： G11B27/24 , G11B20/10 , G11B7/0045
摘要： A recording mark is formed on a recording medium by a predetermined recording signal, a playback signal of the recording mark formed on the recording medium is obtained, and an expected value signal of the playback signal based on the recording signal is generated. Based on an amplitude error between the playback signal and the expected value signal, and for each predetermined unit of the recording signal, a deviation amount of a mark shape of the recording mark from which the playback signal is obtained with respect to a mark shape of an ideal recording mark is calculated, and a mark shape of the recording mark formed on the recording medium is estimated. Based on the deviation amount of the mark shape of the recording mark, a correction amount is calculated for each predetermined unit of the recording signal, and a level of the recording signal is adjusted.
-
公开(公告)号：US10783923B2
公开(公告)日：2020-09-22
申请号：US16293735
申请日：2019-03-06
发明人： Tsuyoshi Nakasendo , Yasumori Hino , Kohei Nakata
摘要： A data coding device includes an error correction coder that converts user data into ECC data by error correction coding, a modulation coder that converts the ECC data into a series of modulated code data, a detector that detects a local concentration of modulation marks/modulation spaces that are shorter than or equal to a prescribed minimum run-length plus N from the series of modulated code data, a conversion determiner that judges whether to convert the series of modulated code data into another series of modulated code data, according to a concentration, detected by the detector, of the modulation marks/modulation spaces, and a modulation data converter that converts the series of modulated code data into the another series of modulated code data.
-
-
-
-
-
-
-
-
-
搜索结果
22 条记录 (耗时 0.02 秒)
