公开(公告)号：US20070206234A1

公开(公告)日：2007-09-06

申请号：US11681561

申请日：2007-03-02

Applicant: Dan Ozasa ,  Naruhiro Masui

Inventor： Dan Ozasa ,  Naruhiro Masui

IPC: H04N1/40

CPC classification number: H04N1/506

Abstract: A disclosed device for generating a pulse-width modulated signal according to image data and based on a pixel clock signal includes a pixel clock generating unit configured to generate the pixel clock signal and a modulated data generating unit configured to generate the pulse-width modulated signal. The pixel clock generating unit includes a multi-phase clock signal generating unit, a comparing unit, a frequency calculation unit, a counting unit, and a pixel clock signal output unit. The modulated data generating unit includes a data converting unit, an edge time calculation unit, and a pulse-width modulated signal output unit.

Abstract translation: 根据图像数据并基于像素时钟信号生成脉宽调制信号的装置包括：像素时钟生成单元，被配置为生成像素时钟信号;调制数据生成单元，被配置为生成脉宽调制信号 。 像素时钟生成单元包括多相时钟信号生成单元，比较单元，频率计算单元，计数单元和像素时钟信号输出单元。 调制数据生成单元包括数据转换单元，边沿时间计算单元和脉冲宽度调制信号输出单元。

公开(公告)号：US07193957B2

公开(公告)日：2007-03-20

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.

Abstract translation: 调制光源以使其发光的光源驱动器包括：叠加电流产生部分，其产生大致对应于与光并行发生的电容所需的充电/放电电流的叠加电流 源于光源的驱动电流的波形的上升部分和衰减部分中的至少一个附近的预定时间段; 以及加法/减法部分，其从驱动电流增加或减去由叠加电流产生部分产生的叠加电流。

公开(公告)号：US07164637B2

公开(公告)日：2007-01-16

申请号：US10938945

申请日：2004-09-13

Applicant: Naruhiro Masui

Inventor： Naruhiro Masui

IPC: G11B7/00

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（S 4 -S 6），其将记录功率设定为所计算的最佳记录功率，并且在施加了最佳记录功率的时间段的一部分中施加的额外记录功率分级时，执行预定的第二测试数据的测试写入， 并且根据再现信号计算最佳额外记录功率，通过测试写入分别计算记录功率和额外记录功率，并记录哪个信息。 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：US06687206B1

公开(公告)日：2004-02-03

申请号：US09584693

申请日：2000-06-01

Applicant: Naruhiro Masui

Inventor： Naruhiro Masui

IPC: G11B509

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.