公开(公告)号：US07301870B2

公开(公告)日：2007-11-27

申请号：US10937285

申请日：2004-09-10

Applicant: Naruhiro Masui

Inventor： Naruhiro Masui

IPC: G11B7/00

CPC classification number: G11B7/1267 ,  G11B7/0045 ,  G11B7/0062

Abstract: An information recording method where different optimum recording power levels are determined for different mark lengths.At a first trial writing process, first predetermined test data, from which a specific pattern, e.g., 3T is removed, are written with recording power levels being shifted, and a first optimum recording power level is determined based on a reproduction signal of the recorded first test data. Then, at a second trial writing process, second predetermined test data that are constituted by 3T marks are written with the recording power level for the 3T marks being shifted, and with the recording power level for marks other than the 3T marks being set at the first optimum recording level, and a second optimum recording power level for the 3T marks is determined based on a reproduction signal of the recorded second test data.

Abstract translation: 一种信息记录方法，其针对不同的标记长度确定不同的最佳记录功率电平。 在第一次试用写入处理中，以记录功率电平被移位的方式写入特定模式（例如，3T被去除）的第一预定测试数据，并且基于所记录的再现信号确定第一最佳记录功率电平 第一个测试数据。 然后，在第二试写处理中，由3T标记构成的第二预定测试数据被写入具有3T标记被移位的记录功率电平，并且除了3T标记之外的标记的记录功率电平被设置在 基于记录的第二测试数据的再现信号来确定第一最佳记录级别和用于3T标记的第二最佳记录功率电平。

公开(公告)号：US20070070834A1

公开(公告)日：2007-03-29

申请号：US11508293

申请日：2006-08-23

Applicant: Naruhiro Masui ,  Hidetoshi Ema

Inventor： Naruhiro Masui ,  Hidetoshi Ema

IPC: G11B7/00

CPC classification number: G11B7/09 ,  G11B7/094 ,  G11B7/0941

Abstract: A signal processing apparatus is provided with a converter for converting at least one analog light detection signal into a digital light detection signal, and a signal generator for generating at least one servo error signal by subjecting the digital light detection signal to a predetermined operation process. The signal generator has a function of modifying contents of the operation process.

Abstract translation: 信号处理装置设置有用于将至少一个模拟光检测信号转换为数字光检测信号的转换器，以及用于通过使数字光检测信号经受预定的操作处理来产生至少一个伺服误差信号的信号发生器。 信号发生器具有修改操作过程的内容的功能。

公开(公告)号：US20070030784A1

公开(公告)日：2007-02-08

申请号：US11581110

申请日：2006-10-16

Applicant: Naruhiro Masui ,  Hidetoshi Ema

Inventor： Naruhiro Masui ,  Hidetoshi Ema

IPC: G11B20/10

CPC classification number: G11B7/1263 ,  G11B7/0062 ,  G11B11/1053

Abstract: A light source driving unit includes a modulating signal generating section generating modulating signals based on driving waveform generating information of a light source, a current source selecting section selecting one or more currents output from current sources based on the modulating signals, a light source driving section generating a current having multi-levels based on the one or more currents selected and supplying the generated current to the light source to drive the light source so that light in multi-levels is generated from the light source, and a cancelling section adding a signal error amount which cancels differences in amounts of signal delays generated between the modulating signal generating section and the light source driving section at a stage prior to the current source selecting section.

公开(公告)号：US20060007841A1

公开(公告)日：2006-01-12

申请号：US11213829

申请日：2005-08-30

Applicant: Naruhiro Masui ,  Hidetoshi Ema

Inventor： Naruhiro Masui ,  Hidetoshi Ema

IPC: G11B7/00

CPC classification number: G11B7/126 ,  G11B7/0062 ,  G11B7/1263 ,  G11B11/1053 ,  H01S5/0427 ,  H01S5/0683

Abstract: A light source drive which modulates a light source so as to cause the same to emit a light, includes: a superposition current generation part which generates a superposition current approximately corresponding to a charging/discharging current needed for a capacitance occurring in parallel to the light source for a predetermined time period near at least one of a rising-up part and a decaying-down part of a waveform of a drive current for the light source; and an addition/subtraction part which adds to or subtracts from the drive current the superposition current generated by the superposition current generation part.

公开(公告)号：US20050041548A1

公开(公告)日：2005-02-24

申请号：US10938945

申请日：2004-09-13

Applicant: Naruhiro Masui

Inventor： Naruhiro Masui

IPC: G11B7/0045 ,  G11B7/006 ,  G11B7/125 ,  G11B7/00 ,  G11B5/09

CPC classification number: G11B7/126 ,  G11B7/0062 ,  G11B7/1267

Abstract: In a method of transforming a recording power level into multi-levels by using an extra recording power level, the optimum value of each recording power level is obtained, thereby achieving recording with good accuracy. By including a first test writing step (S1-S3) of performing test writing of predetermined first test data while varying the recording power in stages, and calculating an optimum recording power from the reproduction signal, and a second test writing step (S4-S6) of setting the recording power to the calculated optimum recording power and performing test writing of predetermined second test data while varying in stages the extra recording power applied in a part of a time period in which the optimum recording power is applied, and calculating an optimum extra recording power from the reproduction signal, the recording power and the extra recording power are separately calculated by test writing, and with which information is recorded. Hence, it is possible to form the shape of a recording mark and the mark position with good accuracy. Thus, recording can be performed with good accuracy.

Abstract translation: 在通过使用额外的记录功率电平将记录功率电平变换为多电平的方法中，获得每个记录功率电平的最佳值，从而以高精度实现记录。 通过包括在分级地改变记录功率的同时执行预定的第一测试数据的测试写入并根据再现信号计算最佳记录功率的第一测试写入步骤（S1-S3）和第二测试写入步骤（S4-S6 ），将记录功率设定为计算出的最佳记录功率，并且在施加了最佳记录功率的时间段的一部分中分级施加的额外记录功率的同时对预定的第二测试数据进行测试写入，并且计算最佳记录功率 来自再现信号的额外记录功率，记录功率和附加记录功率通过测试写入分别计算，并记录有哪些信息。 因此，可以以高精度形成记录标记的形状和标记位置。 因此，可以以高精度执行记录。

公开(公告)号：US07791634B2

公开(公告)日：2010-09-07

申请号：US11793594

申请日：2006-04-20

Applicant: Naruhiro Masui ,  Hidetoshi Ema ,  Nobunari Tsukamoto

Inventor： Naruhiro Masui ,  Hidetoshi Ema ,  Nobunari Tsukamoto

IPC: B41J2/435

CPC classification number: G02B26/127 ,  G06K15/1219 ,  H04N1/0473 ,  H04N2201/0082 ,  H04N2201/04755 ,  H04N2201/04791 ,  H04N2201/04794

Abstract: A comparator compares a time interval between a first synchronization signal and a second synchronization signal with a target value, and outputs an error therebetween. A frequency calculator calculates a set value of a pixel clock frequency based on the error output from the comparator, and outputs a frequency specification signal for specifying a pixel clock frequency according to the calculated set value. A frequency divider divides a high frequency clock generated by a high frequency clock generator by a frequency division ratio based on the frequency specification signal output from the frequency calculator, and generates the pixel clock.

Abstract translation: 比较器将第一同步信号和第二同步信号之间的时间间隔与目标值进行比较，并在其间输出误差。 频率计算器基于从比较器输出的误差来计算像素时钟频率的设定值，并根据计算出的设定值输出用于指定像素时钟频率的频率指定信号。 分频器基于从频率计算器输出的频率指定信号，通过分频比将由高频时钟发生器产生的高频时钟分频，并生成像素时钟。

公开(公告)号：US07684531B2

公开(公告)日：2010-03-23

申请号：US11002885

申请日：2004-12-03

Applicant: Naruhiro Masui ,  Hidetoshi Ema

Inventor： Naruhiro Masui ,  Hidetoshi Ema

IPC: H04L7/00

CPC classification number: H04L7/0338

Abstract: A data recovery method includes the steps of: (a) oversampling data that have been transmitted serially in sync with a first clock of frequency f1, using a multiphase clock generated by shifting a phase of a second clock of frequency f2 at a prescribed interval, the second frequency f2 of the multiphase clock being at or below the first frequency f1; (b) extracting f1/f2 bits on average from the oversampled data; and (c) recovering the extracted bits to restore the received data.

Abstract translation: 数据恢复方法包括以下步骤：（a）使用通过以规定间隔移位频率f2的第二时钟的相位而产生的多相时钟，对与频率f1的第一时钟同步地串行发送的数据进行过采样， 多相时钟的第二频率f2处于或低于第一频率f1; （b）从过采样数据中平均提取f1 / f2位; 和（c）恢复提取的比特以恢复所接收的数据。

公开(公告)号：US07573790B2

公开(公告)日：2009-08-11

申请号：US11581150

申请日：2006-10-16

Applicant: Naruhiro Masui ,  Hidetoshi Ema

Inventor： Naruhiro Masui ,  Hidetoshi Ema

IPC: G11B15/52

CPC classification number: G11B7/1263 ,  G11B7/0062 ,  G11B11/1053

Abstract: A light source driving unit includes a modulating signal generating section generating modulating signals based on driving waveform generating information of a light source, a current source selecting section selecting one or more currents output from current sources based on the modulating signals, a light source driving section generating a current having multi-levels based on the one or more currents selected and supplying the generated current to the light source to drive the light source so that light in multi-levels is generated from the light source, and a cancelling section adding a signal error amount which cancels differences in amounts of signal delays generated between the modulating signal generating section and the light source driving section at a stage prior to the current source selecting section.

公开(公告)号：US07349303B2

公开(公告)日：2008-03-25

申请号：US10720230

申请日：2003-11-25

Applicant: Naruhiro Masui

Inventor： Naruhiro Masui

IPC: G11B7/0045

CPC classification number: G11B27/24 ,  G11B7/00456 ,  G11B7/0053 ,  G11B7/00745 ,  G11B20/1403 ,  G11B2220/218 ,  G11B2220/2562

Abstract: In an information recording method and apparatus, a sequence of sync frames indicative of data is recorded onto tracks of an optical recording medium. In the recording medium, prepits are formed on lands between the tracks at given intervals, and sync patterns, providing synchronization on a sync-frame basis, are inserted in the sync frames such that each sync pattern has a length in a track direction larger than a length of one of the prepits and a position of each sync pattern matches with a position of at least one of the prepits. Codes that represent sync patterns for the sync frames are selected such that each sync pattern is formed as a space on the recording medium. Modulation codes are generated based on the sync frames in which the selected codes are inserted, by modulating the sync frames containing the selected codes in accordance with a predetermined modulation scheme. A sequence of recording pulses is generated by converting the modulation codes through a predetermined conversion scheme. A prepit position signal is detected from one of the prepits for each of the sync frames during the writing of the recording pulses to the recording medium, so that a write position control is performed based the detected prepit position signal. Further disclosed in an optical recording medium which is appropriate for use with the information recording method and apparatus.

Abstract translation: 在信息记录方法和装置中，指示数据的同步帧序列记录在光记录介质的轨道上。 在记录介质中，以给定间隔在轨道之间的平台上形成预凹坑，并且以同步帧为基础提供同步的同步图案被插入到同步帧中，使得每个同步图案的轨道方向上的长度大于 预定坑之一的长度和每个同步模式的位置与至少一个预凹坑的位置相匹配。 选择表示同步帧的同步模式的代码，使得每个同步模式形成为记录介质上的空间。 通过根据预定的调制方式调制包含所选择的代码的同步帧，基于插入所选择的代码的同步帧来产生调制码。 通过将调制码转换成规定的转换方式，生成记录脉冲序列。 在将记录脉冲写入记录介质期间，对于每个同步帧的预制凹坑中的一个检测预位置信号，从而基于检测到的预置位置信号执行写入位置控制。 进一步在适用于信息记录方法和装置的光记录介质中公开。

公开(公告)号：US07313075B2

公开(公告)日：2007-12-25

申请号：US10408367

申请日：2003-04-08

Applicant: Naruhiro Masui ,  Kenya Yokoi

Inventor： Naruhiro Masui ,  Kenya Yokoi

IPC: G11B7/00

CPC classification number: G11B7/126 ,  G11B7/0045

Abstract: An optical information recording method and apparatus which records information on a recording medium by irradiating the recording medium with an irradiation light of a recording power to form a recorded-mark on the recording medium such that reflection coefficient from an area of the recorded-mark is different than a reflection coefficient from an area of the recording medium where the recorded-mark is not formed by a changing power of the irradiation light. Information is recorded by modulating the irradiation light according to the information for recording, forming a recorded-mark on the recording medium by changing the power of the irradiation light between a recording power and a non-recording power, receiving reflection light of the irradiation light reflected by the recording medium and producing a corresponding light signal, determining a state of the recorded-mark based upon the light signal produced during a predetermined period of time immediately after the irradiation light changes from the recording power to the non-recording power, and controlling the recording power of the irradiation light according to the state of the recorded-mark.

Abstract translation: 一种光学信息记录方法和装置，其通过用记录功率的照射光照射记录介质以在记录介质上形成记录标记，使得来自记录标记的区域的反射系数为 不同于来自记录介质的区域的反射系数，其中记录标记不由照射光的变化的功率形成。 通过根据用于记录的信息调制照射光来记录信息，通过改变记录功率和非记录功率之间的照射光的功率，在记录介质上形成记录标记，接收照射光的反射光 由记录介质反射并产生对应的光信号，基于在照射光从记录功率改变到非记录功率之后的预定时间段期间产生的光信号来确定记录标记的状态，以及 根据记录标记的状态控制照射光的记录功率。