公开(公告)号：US07151723B2

公开(公告)日：2006-12-19

申请号：US09940349

申请日：2001-08-27

申请人： Norikazu Takasaka ,  Akira Mashimo

发明人： Norikazu Takasaka ,  Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B7/126 ,  G11B7/0055 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943

摘要： An optical disc device for changing intensities of light beams illuminated on an optical disc. The optical disc device comprises the following elements. A photo detecting device divided into a plurality of photo detectors is used for detecting the reflected light beams illuminated on an optical disc. A plurality of amplifiers is used for changing gains to respectively amplify the output signals of the photo detectors when recording and reproducing on/from the optical disc. A calculating device is used for calculating the output signals of the amplifiers to generate the servo signals. By adding the correction offset signals for correcting the offset voltages of the amplifiers and the photo detectors to the amplifiers, the correction offset signals are amplified. It is, therefore, not necessary to change the correction offset voltages even though the gain of the amplifier is changed and not necessary to change the offset voltage and is independent of the gain-switching of the amplifier.

公开(公告)号：US07599262B2

公开(公告)日：2009-10-06

申请号：US11493462

申请日：2006-07-25

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/24082 ,  G11B20/10 ,  G11B20/14 ,  G11B27/24 ,  G11B2220/2541

摘要： To detect an MSK modulation mark from an MSK-modulated wobble signal without fail. A wobble signal of an optical disk is supplied to an address decoding circuit. The address decoding circuit performs exclusive-OR operation of a binarized wobble signal and a reference clock signal generated from the wobble signal by an PLL circuit, to thus compute a proportion of the exclusive-OR result assuming a value of one every half period of a reference clock signal. When there are continuously present a predetermined number of sections or more where a proportion becomes a predetermined threshold proportion or more, the sections are detected as an MSK modulation mark. A system controller changes the threshold proportion in accordance with crosstalk from an adjacent track.

摘要翻译： 从MSK调制的摆动信号中检测出MSK调制标记，而不会失败。 光盘的摆动信号被提供给地址解码电路。 地址解码电路通过PLL电路进行二进制摆动信号和由摆动信号产生的参考时钟信号的异或运算，从而计算出异或结果的比例，假设每半个周期的值为1 参考时钟信号。 当连续存在预定数量的部分或更多部分，其中比例成为预定阈值比例或更多时，这些部分被检测为MSK调制标记。 系统控制器根据来自相邻轨道的串扰改变阈值比例。

公开(公告)号：US07245579B2

公开(公告)日：2007-07-17

申请号：US10877537

申请日：2004-06-25

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/24 ,  G11B5/09

CPC分类号： G11B27/24 ,  G11B7/0053 ,  G11B7/00718 ,  G11B7/24082 ,  G11B2220/216 ,  G11B2220/2545 ,  G11B2220/2575

摘要： A high-definition optical disk and a high-definition optical disk drive, which record data on lands and grooves. Wobbles are formed in grooves and lands of an optical disk, and address information is embedded in the wobbles. The wobbles are formed so as to become in phase with each other in the grooves. An address of the land sandwiched between the grooves is detected from the wobble of the groove. When the wobble of the land is not an in-phase wobble but is of opposite phase, a gray code of the wobble is substituted with a binary address such that 0 is achieved when the gray code is converted into the binary address. As a result, even in the case of the wobble of opposite phase, the address information about the land is made coincident with address information about an inner-radius-side adjacent groove, thereby determining address information about the land.

摘要翻译： 高分辨率光盘和高清晰度光盘驱动器，用于在陆地和凹槽上记录数据。 摇摆形成在光盘的凹槽和平台中，并且地址信息嵌入在摆动中。 摆动形成为在槽中彼此同相。 从槽的摆动中检测出夹在槽之间的地面的地址。 当地面的摆动不是同相摆动但是具有相反相位时，摆动的灰色代码被二进制地址替换，使得当灰度代码被转换成二进制地址时，实现0。 结果，即使在相反的摆动的情况下，关于陆地的地址信息与关于内半径侧相邻槽的地址信息一致，从而确定关于陆地的地址信息。

公开(公告)号：US07212486B2

公开(公告)日：2007-05-01

申请号：US10283802

申请日：2002-10-29

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/00745 ,  G11B7/24082

摘要： In this optical disk device, a reflected light of a light beam reflected from a pre-pit-formed side of a track wobbled on a disk is detected as a first detection signal. A reflected light of the light beam reflected from the other side of the track is detected as a second detection signal. The first detection signal and/or the second detection signal are/is amplified with a gain(s) so set that a peak value of a wobble signal component of the first detection signal coincides with a bottom value of a wobble signal component of the second detection signal.

摘要翻译： 在该光盘装置中，检测从摆动在盘上的轨道的预制坑形成侧反射的光束的反射光作为第一检测信号。 从轨道的另一侧反射的光束的反射光被检测为第二检测信号。 第一检测信号和/或第二检测信号被放大，使得第一检测信号的摆动信号分量的峰值与第二检测信号的摆动信号分量的底值一致， 检测信号。

公开(公告)号：US20060018230A1

公开(公告)日：2006-01-26

申请号：US11185647

申请日：2005-07-19

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B20/1833 ,  G11B7/0053

摘要： An optical disk device which drives HD-DVD or the like. In an HD-DVD type optical disk, address information is embedded in four wobble waves having the same phase. A wobble signal is detected by an optical pickup and demodulated by an address decoding circuit. The address decoding circuit detects an amount of phase difference of the wobble signal. The system controller sets an error flag in a bit in which the detected amount of phase difference exceeds a predetermined range. When a reading error is determined by means of CRC or the like, bit data replacement is performed with regard to the bit in which an error flag has been set, thereby correcting the error.

公开(公告)号：US06990056B2

公开(公告)日：2006-01-24

申请号：US10082129

申请日：2002-02-26

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/00

CPC分类号： G11B27/24 ,  G11B7/0053 ,  G11B7/131 ,  G11B7/24082 ,  G11B20/1403

摘要： A recordable or rewritable optical disk device capable of reproducing a wobble signal accurately at a high S/N ratio to thereby get address information even at a time of high-speed recording is disclosed. An optical disk is formed with wobbled guide tracks, and the light reflected from the optical disk is picked up by an optical pickup unit, which supplies corresponding electric signal to a wobble signal reproducing section. In the wobble signal reproducing section, at a time of recording, the input signal is sampled not only during a period of reproducing power and also during a period of recording power, and the two sampled signals are added to reproduce a wobble signal. The sampling during the period of recording power may be carried out within a period where the quantity of reflected light is in a stable condition after a pit is formed on the optical disk.

摘要翻译： 公开了一种能够以高S / N比精度地再现摆动信号，从而即使在高速记录时也获得地址信息的可记录或可重写光盘装置。 光盘形成有摆动的导轨，并且由光学拾取单元拾取从光盘反射的光，该光学拾取单元将相应的电信号提供给摆动信号再现部分。 在摆动信号再现部分中，在记录时，不仅在再现功率的周期期间和记录功率的周期期间对输入信号进行采样，并且相加两个采样信号以再现摆动信号。 记录功率期间的采样可以在光盘上形成凹坑之后的反射光量处于稳定状态的期间内进行。

公开(公告)号：US06954709B2

公开(公告)日：2005-10-11

申请号：US10226448

申请日：2002-08-23

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B7/004 ,  G11B20/10 ,  G11B20/14 ,  G06F19/00

CPC分类号： G11B20/1403 ,  G11B20/10009

摘要： A signal processing circuit outputs a signal corresponding to a quality of a digitized input signal. An edge counter of the signal processing circuit counts the number of times the input signal rises and/or falls in a predetermined period. An output unit of the signal processing circuit outputs a signal representing the number of times counted by the edge counter. This signal is output as the signal corresponding to the quality of the input signal.

摘要翻译： 信号处理电路输出与数字化输入信号的质量对应的信号。 信号处理电路的边缘计数器对输入信号在预定时间段内上升和/或下降的次数进行计数。 信号处理电路的输出单元输出表示由边缘计数器计数的次数的信号。 该信号作为与输入信号的质量对应的信号输出。

公开(公告)号：US20050094517A1

公开(公告)日：2005-05-05

申请号：US10982245

申请日：2004-11-04

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G11B20/10 ,  G11B5/09 ,  G11B7/00 ,  G11B7/005

CPC分类号： G11B20/1217 ,  G11B20/1426 ,  G11B2020/1287 ,  G11B2020/1442

摘要： An optical disk apparatus for detecting synchronization signals of an optical disk. Marks and spaces are alternately arranged as synchronization signals of the optical disk. An encoding/decoding circuit of the optical disk apparatus utilizes a rule for alternately arranging synchronization signals, thereby verifying a detected synchronization signal. When the polarity of a synchronization signal detected from a preceding synchronization frame is a mark, the next synchronization signal is a space. When the polarity of a detected synchronization signal is a space, the signal is determined to be a correct synchronization signal.

摘要翻译： 一种光盘装置，用于检测光盘的同步信号。 标记和空格交替排列成光盘的同步信号。 光盘装置的编码/解码电路利用交替排列同步信号的规则，从而验证检测到的同步信号。 当从前一同步帧检测到的同步信号的极性是标记时，下一个同步信号是一个空格。 当检测到的同步信号的极性是空间时，该信号被确定为正确的同步信号。

公开(公告)号：US06807135B1

公开(公告)日：2004-10-19

申请号：US09659089

申请日：2000-09-11

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B700

CPC分类号： G11B7/0956 ,  G11B7/00736 ,  G11B7/0938 ,  G11B7/0945 ,  G11B7/24085

摘要： A tilt detection system includes an optical disk having a series of data recorded therein, the series of data having a pulse width smaller than the minimum pulse width of data recorded in an ordinary optical disk; a reproducing part reproducing a signal from the optical disk by emitting a light beam onto the optical disk; and a tilt detecting part detecting a tilt of the light beam with respect to the optical disk based on a reproduced RF signal provided by the reproducing part when the series of data having the smaller pulse width is reproduced.

摘要翻译： 倾斜检测系统包括具有记录在其中的一系列数据的光盘，所述一系列数据具有小于记录在普通光盘中的数据的最小脉冲宽度的脉冲宽度; 再现部分通过将光束发射到光盘上来再现来自光盘的信号; 以及当再现具有较小脉冲宽度的一系列数据时，基于由再现部分提供的再现RF信号来检测光束相对于光盘的倾斜的倾斜检测部分。

公开(公告)号：US06794922B2

公开(公告)日：2004-09-21

申请号：US10081344

申请日：2002-02-20

申请人： Akira Mashimo

发明人： Akira Mashimo

IPC分类号： G06F764

CPC分类号： G06G7/186

摘要： A signal processing circuit outputs an output signal corresponding to a pulse width of an input pulse signal. This signal processing circuit comprises means for accumulating pulse widths of the input pulse signal for a predetermined period of time, and means for outputting the output signal corresponding to the accumulated pulse width. Each of these pulse widths has one of positive and negative polarities.

摘要翻译： 信号处理电路输出与输入脉冲信号的脉冲宽度对应的输出信号。 该信号处理电路包括用于在预定时间段内累积输入脉冲信号的脉冲宽度的装置，以及用于输出与累积脉冲宽度对应的输出信号的装置。 这些脉冲宽度中的每一个具有正极性和负极性之一。