公开(公告)号：US08817583B2

公开(公告)日：2014-08-26

申请号：US13880359

申请日：2012-08-31

申请人： Ryoji Hirose ,  Harumitsu Miyashita

发明人： Ryoji Hirose ,  Harumitsu Miyashita

IPC分类号： G11B27/36 ,  G11B7/0045

CPC分类号： G11B7/00458

摘要： An optical read/write apparatus according to an embodiment includes: an optical head unit (2a, 2b) which focuses a write light beam and a read light beam onto an optical storage medium (100) and which generates a signal based on the light beam that has been reflected from the optical storage medium; and a control section (6) which controls the optical head unit (2a, 2b) so that the optical head unit records a mark on the optical storage medium by irradiating the optical storage medium with the write light beam and reads the recorded mark on the optical storage medium with the read light beam. After having started to record the mark on the optical storage medium by irradiating the optical storage medium with the write light beam and before forming the recorded mark completely, the optical head unit (2a, 2b) reads the recorded mark on the optical storage medium with the read light beam.

摘要翻译： 根据实施例的光学读/写装置包括：将写入光束和读取光束聚焦到光学存储介质（100）上并且基于光束产生信号的光学头单元（2a，2b） 已从光学存储介质反射出来; 以及控制部分（6），其控制光学头单元（2a，2b），使得光学头单元通过用光学光束照射光学存储介质来在光学存储介质上记录标记，并读取记录标记 具有读取光束的光学存储介质。 在通过用写入光束照射光学存储介质并且在完全形成记录标记之前开始在光学存储介质上记录标记之后，光学头单元（2a，2b）在光学存储介质上读取记录的标记， 读光束。

公开(公告)号：US08270542B2

公开(公告)日：2012-09-18

申请号：US12510419

申请日：2009-07-28

申请人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Hiromichi Ishibashi ,  Shigeru Furumiya

发明人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Hiromichi Ishibashi ,  Shigeru Furumiya

IPC分类号： H04L27/06

CPC分类号： G11B20/1816

摘要： A most probable path is selected from a number n (where n≧2) of paths of state transitions occurring from a first state Sk−j (where k≧3 and j≧2) at a time k−j into a second state Sk at a time k. The method includes the steps of detecting predetermined combinations of the first and second states Sk−j and Sk defining the n probable paths in a predetermined period j between the times k−j and k, and evaluating the reliability of a read signal, decoded in the period j, by |Pa−Pb|. Pa and Pb indicate the probabilities of state transition of first and second state transition paths in the period j. The first and second state transition paths are estimated to be the most probable and the second most probable, respectively, among the n probable paths defined by the combinations detected.

摘要翻译： 从时刻k-j的第一状态Sk-j（其中k≥3和j≥2）发生的状态转换路径的数n（其中n≥2）中选择最可能的路径到第二状态Sk 在一个时间k。 该方法包括以下步骤：检测在时间k-j和k之间的预定周期j中定义n个可能路径的第一和第二状态Sk-j和Sk的预定组合，并且评估读取信号的可靠性， 周期j，由| Pa-Pb |​​。 Pa和Pb表示周期j中第一和第二状态转换路径的状态转移的概率。 估计第一和第二状态转换路径是由检测到的组合定义的n个可能路径中最可能和最可能的最可能的。

公开(公告)号：US20110032809A1

公开(公告)日：2011-02-10

申请号：US12910091

申请日：2010-10-22

申请人： Harumitsu Miyashita ,  Kohei Nakata

发明人： Harumitsu Miyashita ,  Kohei Nakata

IPC分类号： G11B27/36

CPC分类号： G11B7/013 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/1012 ,  G11B20/10296 ,  G11B20/10481 ,  G11B2220/216 ,  G11B2220/2541

摘要： A method for rating an information recording medium according to the present invention includes the steps of: receiving a digital read signal, which has been generated based on an analog read signal representing information that has been read from the information recording medium, and shaping the waveform of the digital read signal; subjecting the shaped digital read signal to maximum likelihood decoding, thereby generating a binarized signal showing a result of the maximum likelihood decoding; and calculating the quality of the digital read signal based on the shaped digital read signal and the binarized signal. If the quality of the read signal is calculated by a PRML method in which a number of zero-cross portions are included in a merging path of a minimum difference metric, the quality is calculated by using only a state transition pattern in which only one zero-cross portion is included in a merging path of a non-minimum difference metric.

摘要翻译： 根据本发明的用于对信息记录介质进行评级的方法包括以下步骤：接收基于表示从信息记录介质读取的信息的模拟读取信号产生的数字读取信号，并且对波形进行整形 的数字读取信号; 对成形数字读取信号进行最大似然解码，从而生成表示最大似然解码结果的二值化信号; 并根据成形数字读取信号和二值化信号计算数字读取信号的质量。 如果通过PRML方法计算读取信号的质量，其中在最小差值度量的合并路径中包括多个零交叉部分，则仅通过仅使用仅一个零的状态转换模式来计算质量 - 交叉部分被包括在非最小差值度量的合并路径中。

公开(公告)号：US07848198B2

公开(公告)日：2010-12-07

申请号：US11666884

申请日：2005-10-14

申请人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

发明人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0053 ,  G11B19/12

摘要： An information processing device for processing specific information recorded to a recording medium that has a characteristic identification unit and a processing unit. The characteristic identification unit identifies the reflection characteristic of the recording medium. The processing unit processes the specific information recorded to the recording medium according to the identified reflection characteristic. The reflection characteristic is either a first characteristic such that the reflectance of light reflected by a recorded region of the recording medium (referred to as first reflectance) is greater than the reflectance of light reflected by an unrecorded region of the recording medium (referred to as second reflectance), or a second characteristic such that the first reflectance is less than the second reflectance.

摘要翻译： 一种用于处理记录在具有特征识别单元和处理单元的记录介质上的特定信息的信息处理设备。 特征识别单元识别记录介质的反射特性。 处理单元根据所识别的反射特性来处理记录在记录介质上的特定信息。 反射特性是由记录介质的记录区域反射的光的反射率（被称为第一反射率）大于由记录介质的未记录区域反射的光的反射率的第一特性（称为第一反射率 第二反射率）或第二特性使得第一反射率小于第二反射率。

公开(公告)号：US07584315B2

公开(公告)日：2009-09-01

申请号：US10818568

申请日：2004-04-06

申请人： Naohiro Kimura ,  Harumitsu Miyashita ,  Takeshi Nakajima ,  Hiromichi Ishibashi ,  Yoshikazu Yamamoto ,  Kohei Nakata

发明人： Naohiro Kimura ,  Harumitsu Miyashita ,  Takeshi Nakajima ,  Hiromichi Ishibashi ,  Yoshikazu Yamamoto ,  Kohei Nakata

IPC分类号： G06F13/12 ,  G06F3/00 ,  G06F13/00 ,  G11B7/085

CPC分类号： G01R31/3177

摘要： An integrated circuit includes: a signal processor, which receives an input signal and generates a processed signal, representing processing information obtained by subjecting the input signal to predetermined processing, and at least one type of internal signal including internal information obtained during the processing; at least one memory storing the processing information; an interface exchanges signals with an external device; and a controller controlling the signal processor, memory and interface. On receiving a first instruction from the external device through the interface, the controller controls the signal processor and memory such that the processing information is once stored in the memory and then output to the external device via the interface. In response to a second instruction, the controller controls the signal processor and memory such that the internal information is once stored in the memory and then output to the external device via the interface.

摘要翻译： 集成电路包括：信号处理器，其接收输入信号并产生经处理的信号，表示通过对输入信号进行预定处理而获得的处理信息;以及至少一种内部信号，包括在处理期间获得的内部信息; 存储所述处理信息的至少一个存储器; 接口与外部设备交换信号; 以及控制信号处理器，存储器和接口的控制器。 在通过接口从外部设备接收到第一指令时，控制器控制信号处理器和存储器，使得处理信息曾经存储在存储器中，然后经由接口输出到外部设备。 响应于第二指令，控制器控制信号处理器和存储器，使得内部信息被一次存储在存储器中，然后经由接口输出到外部设备。

公开(公告)号：US07366234B2

公开(公告)日：2008-04-29

申请号：US10936703

申请日：2004-09-09

申请人： Akira Yamamoto ,  Harumitsu Miyashita

发明人： Akira Yamamoto ,  Harumitsu Miyashita

IPC分类号： H03H7/30

CPC分类号： G11B20/10027 ,  G11B5/035 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296 ,  G11B2020/1288 ,  G11B2220/2541

摘要： An adaptive equalization apparatus comprises an equalizer for equalizing a playback signal read from a recording medium, using tap coefficients; a maximum likelihood decoder for subjecting an equalized signal outputted from the equalizer to maximum likelihood decoding; a first delay unit for delay-adjusting the playback signal to make the signal coincide with the timing of a tentative decoded signal that is obtained in the process of maximum likelihood decoding; a second delay unit for delay-adjusting the equalized signal to make the signal coincide with the timing of the tentative decoded signal; and a coefficient adaptive controller for adaptively controlling the tap coefficients so that an error in the maximum likelihood decoding is minimized, on the basis of the tentative decoded signal, an output of the first delay unit, and an output of the second delay unit.

摘要翻译： 自适应均衡装置包括均衡器，用于使用抽头系数来均衡从记录介质读取的重放信号; 用于对从均衡器输出的均衡信号进行最大似然解码的最大似然解码器; 第一延迟单元，用于对所述重放信号进行延迟调整，以使所述信号与在最大似然解码处理中获得的暂定解码信号的定时一致; 第二延迟单元，用于对所述均衡信号进行延迟调整，使所述信号与所述暂定解码信号的定时一致; 以及系数自适应控制器，用于根据暂定解码信号，第一延迟单元的输出和第二延迟单元的输出，自适应地控制抽头系数，使最大似然解码中的误差最小化。

公开(公告)号：US07164644B2

公开(公告)日：2007-01-16

申请号：US11253682

申请日：2005-10-20

申请人： Takahiro Nagai ,  Hideshi Ishihara ,  Takashi Yumiba ,  Rie Takahashi ,  Mamoru Shoji ,  Hiroyuki Yamaguchi ,  Harumitsu Miyashita

发明人： Takahiro Nagai ,  Hideshi Ishihara ,  Takashi Yumiba ,  Rie Takahashi ,  Mamoru Shoji ,  Hiroyuki Yamaguchi ,  Harumitsu Miyashita

IPC分类号： G11B20/12

CPC分类号： G11B20/0021 ,  G11B7/007 ,  G11B7/00745 ,  G11B7/24085 ,  G11B20/00086 ,  G11B20/00268 ,  G11B20/00376 ,  G11B20/00586 ,  G11B20/00594 ,  G11B20/0071 ,  G11B20/00768 ,  G11B20/10 ,  G11B27/3027 ,  G11B2220/2562

摘要： An optical disc has a plurality of sectors, where each of the plurality of sectors includes a plurality of frames. A sub information bit value of “0” or “1” is assigned to the plurality of frames constituting a sector, excluding the first and last frames. Edge positions are displaced so that leading/lagging errors appear in accordance with a certain rule when data fields of the frames to which the sub information bit value “1” is assigned are read. Edge positions are displaced so that leading/lagging errors appear in accordance with a reversal of the certain rule when data fields of the frames to which the sub information bit value “0” is assigned are read.

摘要翻译： 光盘具有多个扇区，其中多个扇区中的每一个扇区包括多个帧。 子信息位值“0”或“1”被分配给构成扇区的多个帧，不包括第一帧和最后帧。 当分配了子信息位值“1”的帧的数据字段被读取时，边缘位置被移位，使得引导/滞后错误按照某个规则出现。 当分配了子信息位值“0”的帧的数据字段被读取时，边缘位置被移位，使得引导/滞后错误根据某个规则的反转出现。

公开(公告)号：USRE39306E1

公开(公告)日：2006-09-26

申请号：US10785863

申请日：2004-02-25

申请人： Shinichi Konishi ,  Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshihiko Takahashi ,  Toshiya Akagi ,  Yuji Hisakado ,  Yukihiro Yamasaki

发明人： Shinichi Konishi ,  Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshihiko Takahashi ,  Toshiya Akagi ,  Yuji Hisakado ,  Yukihiro Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/00375 ,  G11B7/005 ,  G11B20/10527

摘要： An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.

公开(公告)号：US07095696B2

公开(公告)日：2006-08-22

申请号：US10473307

申请日：2002-04-05

申请人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshiya Akagi ,  Shinichi Konishi

发明人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshiya Akagi ,  Shinichi Konishi

IPC分类号： G11B5/09

CPC分类号： G11B7/126 ,  G11B7/00 ,  G11B7/00456 ,  G11B7/006 ,  G11B20/10009 ,  G11B20/1426

摘要： A recording/producing device for writing data on a recording medium, or reading data from the recording medium, wherein data matching a recording pattern so specified as to include a plurality of mutually different sets of mark lengths and space lengths is written on the recording medium, and the data is then read to generate data signals. An edge shift detector uses data signals to measure the edge shift amount of a mark formed on a recording medium for each set of a mark length and a space length. A record controller sets a recording parameter for each set of a mark length and a space length based on the measured edge shift amount.

摘要翻译： 一种用于在记录介质上写入数据或从记录介质读取数据的记录/产生装置，其中将与指定为包括多个相互不同的多个标记长度和间隔长度的记录图案匹配的数据被写入记录介质 ，然后读取数据以产生数据信号。 边缘移位检测器使用数据信号来测量形成在记录介质上的每个标记长度和间隔长度的标记的边缘移位量。 记录控制器基于所测量的边缘偏移量为每组标记长度和空间长度设置记录参数。

公开(公告)号：US20060153041A1

公开(公告)日：2006-07-13

申请号：US10532468

申请日：2003-10-20

申请人： Harumitsu Miyashita ,  Takeshi Nakajima ,  Naohiro Kimura

发明人： Harumitsu Miyashita ,  Takeshi Nakajima ,  Naohiro Kimura

IPC分类号： G11B20/10

CPC分类号： G11B27/3027 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10222 ,  G11B20/10425 ,  G11B2020/1288 ,  G11B2220/2541 ,  G11B2220/2562 ,  H03L7/091 ,  H03L7/107 ,  H04L7/033 ,  H04L7/041

摘要： A frequency and phase control apparatus includes an analog/digital conversion section for converting a reproduction signal into a multiple bit digital signal based on a clock signal; a maximum likelihood decoding section for converting the multiple bit digital signal into a binary signal; a pattern detection section for detecting a pattern of the binary signal; and a determination section for determining whether or not the multiple bit digital signal and the clock signal are in synchronization with each other based on the detection result. When the determination result of the determination section indicates that the multiple bit digital signal and the clock signal are in synchronization with each other, the maximum likelihood decoding section generates a binary signal based on a first state transition rule; otherwise, the maximum likelihood decoding section generates a binary signal based on a second state transition rule.