公开(公告)号：JP2007012277A

公开(公告)日：2007-01-18

申请号：JP2006287559

申请日：2006-10-23

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： MORISHIMA MORIHITO ,  USUI AKIRA ,  SHIOZAKI YOSHIHIKO

IPC: G11B7/0045 ,  G11B7/09 ,  G11B23/40

Abstract: PROBLEM TO BE SOLVED: To record visible information on a thermosensitive plane of an optical disk in addition to information recording for a recording plane without providing separately a new apparatus or the like. SOLUTION: When recorded data is supplied from a host PC 110, the recorded data is supplied to a laser driver 19 through a buffer memory 36, an encoder 17, and a strategy circuit 18, irradiation of the laser beam in accordance with the recorded data is performed for the optical disk D, on the contrary, when image data is supplied from the host PC 110, the image data is supplied to the laser driver 19 through the buffer memory 36, a control part 16, a FIFO memory 34, and a drive pulse generating part 35, irradiation of the laser beam in accordance with the image data is performed, and the visible image is formed on the thermosensitive plane of the optical disk D. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：除了分开设置新设备等之外，还可以在记录平面的信息记录之外记录光盘的热敏平面上的可见信息。 解决方案：当从主机PC1提供记录数据时，记录的数据通过缓冲存储器36，编码器17和策略电路18提供给激光驱动器19，根据 对于光盘D执行记录的数据，相反，当从主机110提供图像数据时，图像数据通过缓冲存储器36，控制部分16，FIFO存储器 34和驱动脉冲产生部分35，执行根据图像数据的激光束的照射，并且可视图像形成在光盘D的热敏平面上。（C）2007年， JPO＆INPIT

公开(公告)号：JP2006262261A

公开(公告)日：2006-09-28

申请号：JP2005079061

申请日：2005-03-18

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： MORISHIMA MORIHITO

IPC: H03H3/02 ,  H03F1/26 ,  H03F3/217 ,  H03M1/82 ,  H03M7/32

CPC classification number: H03F3/38 ,  H03F1/26 ,  H03F3/217 ,  H03F2200/331

Abstract: PROBLEM TO BE SOLVED: To provide a class-D amplifier which can be configured at a low cost and obtain a high-definition output by performing noise reduction only through digital signal processing, without performing analog processing.
SOLUTION: The present class-D amplifier generates a carrier signal Pct and outputs it to a PWM circuit 13 based on a master clock Φp with no jitter. Furthermore, the generated carrier signal Pct and a sampling signal SL are synchronized by a digital PLL constituted of a phase comparator 19, a loop filter 22 and a carrier oscillator 21. Thus, a carrier signal Pct that is not affected by jitter contained in the sampling signal SL, can be generated. Besides, a phase difference between the sampling signal SL and the carrier signal Pct is fed back through a feedback circuit 14. Thus, jitter caused by a little deviation between the sampling clock SL and the master clockΦp is removed.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供可以以低成本配置的D类放大器，并且通过仅通过数字信号处理执行降噪来获得高清晰度输出，而不进行模拟处理。 解决方案：当前的D类放大器产生载波信号Pct，并且基于没有抖动的主时钟Φp将其输出到PWM电路13。 此外，所生成的载波信号Pct和采样信号SL由相位比较器19，环路滤波器22和载波振荡器21构成的数字PLL同步。因此，不受包含在 可以产生采样信号SL。 此外，采样信号SL和载波信号Pct之间的相位差通过反馈电路14反馈。因此，消除了由采样时钟SL和主时钟Φp之间的一点偏差引起的抖动。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2004355764A

公开(公告)日：2004-12-16

申请号：JP2003154740

申请日：2003-05-30

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： MORISHIMA MORIHITO

IPC: G11B23/40 ,  G11B7/0037 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/013 ,  G11B7/24 ,  G11B20/10 ,  G11B20/14 ,  H04N5/781

CPC classification number: G11B20/10009 ,  G11B7/0045 ,  G11B7/24094 ,  G11B20/1426

Abstract: PROBLEM TO BE SOLVED: To prevent an increase of costs and to form an image at a high speed with a high grade on an optical disk. SOLUTION: Recording data of 24 bytes supplied from a host computer is framed and the pits defined by a bit train signal of the framed data are sequentially formed. In forming the image, the dot data defining the density of the dots of the image to be formed on the optical disk is replaced with the recording data and is supplied from the host computer to the optical apparatus. A discrimination unit 1565 which determines whether the section in the frame data corresponding to the dot data in the bit train signal is a predetermined value or not and a gate circuit 1567 which, in case the discrimination result is affirmative, allows the passage of the bit train signal over a dot period required for image formation of one dot and, in case the discrimination result is negative, interrupts the bit train signal for the dot period are added to the optical apparatus. COPYRIGHT: (C)2005,JPO&NCIPI

公开(公告)号：JP2004271842A

公开(公告)日：2004-09-30

申请号：JP2003061742

申请日：2003-03-07

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： MORISHIMA MORIHITO

IPC: G03H1/04 ,  G03H1/26 ,  G11B7/0065

Abstract: PROBLEM TO BE SOLVED: To prevent the degradation in operability in editing a way how to arrange holograms in an optical disk.
SOLUTION: A region where image formation is possible out of the optical disk is displayed as a window screen 251 on a display device of a host computer and images are laid out by using the window screen 251. As to the holograms, the simple display thereof is performed not by the hologram data indicating their contents but by the images 253 (P1) and 254 (P2) based on preview data. As to the images which are not the holograms, on the other hand, the display is performed by the images 255 (S1) based on the image data indicating their contents. The arrangement change of the images is conduced by moving the images using a pointer 257.
COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2003242669A

公开(公告)日：2003-08-29

申请号：JP2002038984

申请日：2002-02-15

Applicant: YAMAHA CORP

Inventor： MORISHIMA MORIHITO

IPC: G11B7/24 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B7/125 ,  G11B7/1263 ,  G11B7/135 ,  G11B7/1378

Abstract: PROBLEM TO BE SOLVED: To perform more accurate focus control even in emitting a laser beam to an area where reflected light on an optical disk can not be sufficiently obtained. SOLUTION: An optical disk recorder/player performs processing that decides focus control contents prior to recording or the like in emitting a laser beam to an area with small reflectance to perform recording and reproduction (step Sa7). In focus control contents decision processing, a test laser beam is emitted to an area (for example, innermost circumferential area) with large reflectance in the optical disk, and focus control contents are decided on the basis of focus control contents executed at that time and stored in a memory. In emitting a laser beam to the area with small reflectance, focus control is performed according to the focus control contents stored in the memory. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003059047A

公开(公告)日：2003-02-28

申请号：JP2001248645

申请日：2001-08-20

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： MORISHIMA MORIHITO

IPC: G11B7/0045 ,  G11B7/00 ,  G11B7/125

CPC classification number: G11B7/1267

Abstract: PROBLEM TO BE SOLVED: To easily set a recording strategy for obtaining excellent recording quality when an optical disk which does not have its recording strategy prepared in a memory or an optical disk by which excellent recording quality can not be obtained with its recording strategy prepared in the memory is used for recording.
SOLUTION: For the optical disk which does not have its recording strategy prepared in the memory or the optical disk by which specific recording quality can not be obtained with its recording strategy prepared in the memory, all or properly selected recording strategies which are prepared in the memory are used and while recording power is varied, test recording is carried out; and a recording strategy by which relatively high signal quality can be obtained is selected and used for primary recording.
COPYRIGHT: (C)2003,JPO

Abstract translation: 要解决的问题：为了在不具有记录策略的光盘准备好的记录策略的光盘上，为了容易地设定记录策略，该存储器或光盘由于其记录策略的准备不能获得优良的记录质量， 内存用于录制。 解决方案：对于在存储器中准备的其记录策略的光盘或光盘，通过在存储器中准备的记录策略不能获得特定记录质量的所有或适当选择的记录策略， 使用存储器，并且当记录功率变化时，进行测试记录; 并且选择可以获得相对高的信号质量并用于初级记录的记录策略。

公开(公告)号：JP2002352426A

公开(公告)日：2002-12-06

申请号：JP2001154785

申请日：2001-05-24

Applicant: YAMAHA CORP

Inventor： MORISHIMA MORIHITO

IPC: G11B7/0045 ,  G11B7/125 ,  G11B7/126

Abstract: PROBLEM TO BE SOLVED: To record with a high quality even when the surface-shake or the eccentricity exists in an optical disk, and to detect the proper recording power at a high accuracy even when the surface-shake or the eccentricity exists in the optical disk. SOLUTION: A recording signal is recorded by irradiating a track of the optical disk with a laser beam which is modulated, in accordance with the recording signal, into a recording power with which the recording is performed and a non-recording power with which the recording is not performed. At this time, a periodic fluctuating component of a laser beam return beam detection output due to the disk surface-shake or the eccentricity is detected, which repeatedly arises in response to the disk rotation. The laser output power at the time of recording power is corrected so as to cancel the periodic fluctuating component.

公开(公告)号：JP2002260333A

公开(公告)日：2002-09-13

申请号：JP2001057811

申请日：2001-03-02

Applicant: YAMAHA CORP

Inventor： MORISHIMA MORIHITO

IPC: G11B20/10 ,  G11B20/14 ,  G11B27/034 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  H03L7/08 ,  H03L7/087 ,  H04L7/033

Abstract: PROBLEM TO BE SOLVED: To succeedingly write new information after the recording end part of recorded information so that the disorder of synchronization in the write connection position decreases in reproduction. SOLUTION: A PLL circuit 60 is provided with a control loop 66 which performs the phase lock of a read EFM signal to generate a read clock, and a control loop 68 which performs the phase lock of an ATIP synchronous signal to generate a write clock. The oscillation frequencies of a VCO(voltage- controlled oscillator) 70 are set so as to be equal in both control loops 66 and 68. The PLL circuit 60 is controlled by the control loop 66, and the recorded information is read from the near side of the recording end part of recorded information synchronizing with the read clock when write connection instructed is given from the recording end part of recorded information. In the case of reaching the recording end part of recorded information, the control of the PLL circuit 60 is switched to control by the control loop 68, and then new information is written synchronizing with the write clock.

公开(公告)号：JP2002056534A

公开(公告)日：2002-02-22

申请号：JP2000237926

申请日：2000-08-07

Applicant: YAMAHA CORP

Inventor： MORISHIMA MORIHITO

IPC: G01R29/02 ,  G01R29/26 ,  G11B7/0045 ,  G11B7/125 ,  G11B7/126 ,  G11B20/14 ,  G11B27/30 ,  G11B27/36 ,  H03L7/06 ,  H03L7/18

Abstract: PROBLEM TO BE SOLVED: To provide a measuring circuit having the novel constitution for measuring the time base error parameter of a pulse train and also an optical disk recorder using this measuring circuit. SOLUTION: A clock signal is reproduced from a reproducing EFM signal of the optical disk 10 by a PLL circuit 24. A phase error signal pco of the PLL circuit 4 is made to absolute value by an absolute value circuit 38 and averaged by an accumulator 40 for every period of a sub-code frame. The beam power for recording of a laser beam is decided on the basis of the output of the accumulator 40. By a pulse length discriminating circuit 26, the pulse length of the reproducing EFM signal is discriminated. The phase error signal pco of specific pulse length is extracted by an extracting circuit 42 for phase error signal of specific pulse length. The extracted phase error signal pco is averaged by an accumulator 44 for every period of the sub-code frame. The time base of a recording EFM signal having the corresponding pulse length is corrected on the basis of the output of the accumulator 44.

公开(公告)号：JP2001266497A

公开(公告)日：2001-09-28

申请号：JP2000079149

申请日：2000-03-21

Applicant: YAMAHA CORP

Inventor： MORISHIMA MORIHITO

IPC: G11B20/14 ,  G11B7/0045

Abstract: PROBLEM TO BE SOLVED: To suppress frequency of a transmitting signal inside a flexible substrate 150 interposed between a main sheet and a pickup for providing a high- speed optical disk writer. SOLUTION: Inside the pickup, a separator circuit 227 is provided with a PLL circuit 50 for reproducing a basic clock WCLK on the basis of a transmitted EFM signal. Inside the main sheet, a synthesizer circuit 124 is provide with a pulse generator 42 for generating a rectangular wave pulse for synchronizing for the width of 1T or 2T and when the EFM signal is not transmitted, this rectangular wave pulse for synchronizing is transmitted in place of this EFM signal so that the operation of the PLL circuit 50 can be stabilized.