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1. 发明专利

JP2003317388A Disk recording device and disk recording method 审中-公开
标题翻译：盘记录装置和磁盘记录方法
公开(公告)号：JP2003317388A
公开(公告)日：2003-11-07
申请号：JP2002120218
申请日：2002-04-23
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： HIRAYAMA HIROSHI , SUNADA TAKAHIRO , SEKINE TAKEHIKO
IPC分类号： G11B20/10 , G11B7/0045 , G11B20/14
摘要： PROBLEM TO BE SOLVED: To determine the recording address and recording position on an optical disk having a wobble phase modulation format by using a wobble reproduction signal and a track reproduction signal.
SOLUTION: A disk recording device detects address information on the disk and a synchronization signal for each of the wobble reproduction signal and track reproduction signal from the optical disk and, in accordance with each detecting state, selects address information necessary for determining the disk recording track and synchronizing timing necessary for determining the linking position.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：通过使用摆动再现信号和轨道再现信号来确定具有摆动相位调制格式的光盘上的记录地址和记录位置。解决方案：盘记录装置检测盘上的地址信息和来自光盘的摆动再现信号和轨迹再现信号中的每一个的同步信号，并且根据每个检测状态，选择确定盘记录轨迹和确定连接位置所需的同步定时。版权所有（C）2004，JPO

2. 发明专利

JP2004273054A Optical disk recording device and optical disk recording method 有权
公开(公告)号：JP2004273054A
公开(公告)日：2004-09-30
申请号：JP2003064326
申请日：2003-03-11
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： NAGAI YUTAKA , SEKINE TAKEHIKO
IPC分类号： G11B20/14 , G11B7/0045 , G11B7/007 , G11B20/10 , G11B20/12 , G11B27/10 , G11B27/24
CPC分类号： G11B27/10 , G11B20/10212 , G11B20/1217 , G11B27/24 , G11B2020/1274 , G11B2020/1287 , G11B2220/216 , G11B2220/218 , G11B2220/2562
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of recording position slippage by performing synchronous detection from land prepits correctly even when a synchronous pattern is mistaken, concretely when an even synchronous pattern is mistaken to be changed into an odd synchronous pattern in an optical recording disk.
SOLUTION: When the even synchronous pattern is detected from an odd synchronous pattern detecting window, a synchronization locking flag is made to be an unlock. When the synchronization locking flag continues a locked state for 16 sectors, a detection period counter and a recording period counter are synchronized.
COPYRIGHT: (C)2004,JPO&NCIPI

3. 发明专利

JP2004171691A Disk recording and reproducing apparatus 审中-公开
标题翻译：磁盘记录和再现设备
公开(公告)号：JP2004171691A
公开(公告)日：2004-06-17
申请号：JP2002337486
申请日：2002-11-21
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： IKEDA MASAKAZU , NAGAI YUTAKA , HIRABAYASHI MASAYUKI , KATSUKI MANABU , SEKINE TAKEHIKO
IPC分类号： G11B7/0045
摘要： PROBLEM TO BE SOLVED: To provide a technique of recording and reproducing a disk for performing processing even when the judgement delays for the number of error pulses for each sector by a microcomputer is not in time.
SOLUTION: The disk subjected to trial writing by gradually changing the recording conditions for each of the sectors is played back and the results of the error pulse counts obtained from reproducing waveforms and the results of analog/digital conversion are stored for the several sectors into a data memory. The results of the reproduction can be judged in a lump after the processing of the several sectors by reading out the results stored into the memory and therefore the system adaptive to the high-speed processing can be realized and the load of the microcomputer can be reduced.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：即使当微机的每个扇区的误差数量的判断延迟不及时时，提供一种用于执行处理的盘的记录和再现技术。解决方案：对通过逐渐改变每个扇区的记录条件进行试写的磁盘进行再现，并且从再现波形获得的误差脉冲计数结果和模拟/数字转换的结果存储为数个扇区进入数据存储器。通过读出存储在存储器中的结果，可以在多个扇区的处理之后一次性地判断再生的结果，因此可以实现适应于高速处理的系统，并且可以减少微计算机的负担。版权所有（C）2004，JPO

4. 发明专利

JP2003308664A Disk recording and reproducing apparatus and method 审中-公开
标题翻译：磁盘记录和再现装置和方法
公开(公告)号：JP2003308664A
公开(公告)日：2003-10-31
申请号：JP2002111470
申请日：2002-04-15
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： IKEDA MASAKAZU , SEKINE TAKEHIKO
IPC分类号： G11B20/14 , G11B7/0045 , G11B7/007
摘要： PROBLEM TO BE SOLVED: To stably generate a clock and detect an LPP (Land Pre-Pit).
SOLUTION: Only a first pre-pit in a frame being a source of a synchronizing signal from an extracted pre-pit, the phase of a wobble signal is adjusted by a pre-pit signal detected for the particular number of times for a prescribed period, and a recording clock is generated by using the wobble signal whose phase is adjusted. Thus, the clock can stably be generated and the LPP can be detected.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：稳定地生成时钟并检测LPP（Land Pre-Pit）。解决方案：只有帧中的第一预凹坑是来自提取的预凹坑的同步信号的源，摆动信号的相位通过针对特定次数检测到的预凹陷信号来调节，通过使用相位调整的摆动信号来生成记录时钟。因此，可以稳定地产生时钟并且可以检测LPP。版权所有（C）2004，JPO

5. 发明专利

JP2003123404A METHOD AND DEVICE FOR PROTECTING DETECTION OF SYNCHRONOUS DETECTION CODE AND METHOD AND DEVICE FOR PROTECTING DETECTION OF ID NUMBER 审中-公开
公开(公告)号：JP2003123404A
公开(公告)日：2003-04-25
申请号：JP2001320653
申请日：2001-10-18
申请人： HITACHI LTD , HITACHI LG DATA STORAGE INC
发明人： AKABOSHI KENJI , SEKINE TAKEHIKO
IPC分类号： G11B20/14 , G11B7/007 , G11B20/12 , G11B20/18
摘要： PROBLEM TO BE SOLVED: To prevent IDs from being interpolated with erroneous values when erroneously detecting consecutive IDs due to off-track or the like and to shorten the time required for detecting a synchronous detection code again in the case that a frame position is deviated during protective detection using a window not to be able to detect the synchronous detection code after settlement of the frame position in a sector. SOLUTION: The sequentiality of detected IDs and the result of IED error check is monitored, and erroneous ID interpolation caused by off-track is prevented on the basis of two detection results. A second synchronous detection code detecting system is operated independently of a first synchronous detection code detecting system which is operated after settlement of a frame position in a sector, and the second synchronous detection code detecting system is used to correct the first synchronous detection code detecting system performing erroneous protective operation, and thus the window occurrence position of the first synchronous detection code detecting system is returned to a correct value to shorten the time required for detecting the synchronous detection code again.

6. 发明专利

JP2000243024A OPTICAL DISK REPRODUCING DEVICE AND OPTICAL DISK RECORDING/REPRODUCING DEVICE, AND ALSO OPTICAL DISK REPRODUCING METHOD AND OPTICAL DISK RECORDING/ REPRODUCING METHOD 失效
公开(公告)号：JP2000243024A
公开(公告)日：2000-09-08
申请号：JP4292799
申请日：1999-02-22
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： NAGAI YUTAKA , SUENAGA HIDENORI , SEKINE TAKEHIKO
IPC分类号： G11B19/28 , G11B7/00 , G11B7/005 , G11B19/247
摘要： PROBLEM TO BE SOLVED: To attain the securement of furthermore stable operation in an optical disk recording/reproducing device without being affected by the fluctuation of period of a reproduced wobble signal. SOLUTION: The optical disk recording/reproducing device furnished with a circuit for producing the reproduced wobble signal W showing the wobble shape based on the detection output of a reflected or transmitted light of an light beam, by which the optical disk including the wobble shape formed with the specified amplitude and period along a spiral guide track is irradiated, is provided with a corrected wobble signal producing circuit 30 consisting of a measuring circuit 31 for measuring the period of the reproduced wobble signal W, a storage circuit 32 for storing the result W1 of the period measurement by the measuring circuit 31, an external setting circuit 33, to which a set value E1 showing the range of the difference amount is set, a difference comparing circuit 34 for comparing the difference of measurement results W2 of consecutive two periods stored in the storage circuit 32 with the set value E1 and a signal producing circuit 35 for producing the corrected wobble signal W4 based on the comparison result W3 of the difference comparing circuit 34.

7. 发明专利

JPH1116167A INFORMATION RECORDING AND REPRODUCING METHOD AND INFORMATION RECORDING AND REPRODUCING DEVICE USING THE SAME 失效
公开(公告)号：JPH1116167A
公开(公告)日：1999-01-22
申请号：JP16373897
申请日：1997-06-20
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： KAKU TOSHIMITSU , KAWASHIMA TORU , SEKINE TAKEHIKO , SUGIYAMA HISATAKA , SUZUKI YOSHIO , FUSHIMI TETSUYA
IPC分类号： G11B7/00 , G11B7/004 , G11B7/085 , G11B7/09 , G11B7/095 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To satisfactorily detect a prepit part even when tracking control is not performed or is unstable so as to control a signal processing system by performing recording and reproducing processing control with a prepit detecting signal as a reference detected based on a differential signal obtained by light-receiving light returned from an information recording medium through a detector bisected in the track direction. SOLUTION: When a prepit(PID) information signal is detected from a reproducing signal demodulator 17, various drive signals 31-35 are generated by a drive controller 18 on the basis of the PID information but when an area on an optical disk where desired information is recorded, is sought or the PID information is not stably and continuously obtained at the time of starting up an optical disk device, the various drive signals 31-35 are generated based on PID detecting signals IP1 and IP2 from a PID detector 19. The signals IP1 and IP2 are detecting signals corresponding to a land part and a groove part respectively. Consequently, the information of an HPP signal and an RF signal can stably be reproduced.

8. 发明专利

JPH11205157A DEVICE AND METHOD FOR REPRODUCING DIGITAL SIGNAL 失效
公开(公告)号：JPH11205157A
公开(公告)日：1999-07-30
申请号：JP448898
申请日：1998-01-13
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： NAGAI YUTAKA , SEKINE TAKEHIKO
IPC分类号： G11B20/18 , H03M13/00
摘要： PROBLEM TO BE SOLVED: To rewrite only the data in an erroneous sector within a block where an error occurred, by setting a write flag for the unit of a column and clearing the write flag after the processing end of error correction due to a PI parity. SOLUTION: When demodulated data 104 are stored in a RAM 105 less than one ECC block, correcting process is started. In the error correction, first of all, correcting process for the unit of a column is performed according to the PI parity. When it is judged that the correction is disabled as a result of correcting process, the PI flag for the unit of a column is set, When the correction is not disabled, on the other hand, it is checked whether the write flag is set or not. When the write flag is not set, the PI flag is set and the presence of any error in the data on the relevant column is discriminated. When the write flag is set as a result of write flag check, the PI flag is cleared. After the end of processing to the PI flag, the write flag is cleared by a write flag clear mans 122.

9. 发明专利

JPH06161620A OUTPUT SIMULTANEOUS CHANGE CONTROL SYSTEM 失效
公开(公告)号：JPH06161620A
公开(公告)日：1994-06-10
申请号：JP31167492
申请日：1992-11-20
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： INOUE YASUO , SEKINE TAKEHIKO , YAMADA HIDETO , YOKOYAMA TOMOKAZU
IPC分类号： G06F3/00 , G06F13/00 , H03K19/003 , H03K19/0175 , H04L25/02
摘要： PURPOSE:To provide an output simultaneous change control system reducing the effect on a power source/GND at the time of the output simultaneous driving of an IC, an LSI, etc., which are represented by a gate array. CONSTITUTION:This system has a selector 3 outputting a data input signal 1 when a polarity switch signal 5 is '0' and outputting the output signal of an inverter 2 when the signal to '1'. Caption number 11 is a data output signal where the output signal of a latch 7a is outputted to an external terminal via the output buffer 9a of an LSI and caption number 12 is a polarity information output signal where the output signal of a latch 7b is outputted to the external terminal via the output buffer 9b of the LSI. The system has a inversion number decision circuit 13 where the polarity switch signal 5 becomes '1' when the number of bits whose logical value is difficult is more than 5 bits and the signal 5 becomes '0' at the time other than that case as a result of comparison between respective bits corresponding to the signal 1 and the latch 7a.

10. 发明专利

JPH02263325A OPTICAL RECORDING/REPRODUCING DEVICE 失效
公开(公告)号：JPH02263325A
公开(公告)日：1990-10-26
申请号：JP8151389
申请日：1989-04-03
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： MIZOGAMI TAKUYA , SAITO ATSUSHI , SEKINE TAKEHIKO , YOSHIDA NAOMI
IPC分类号： G11B20/14 , G11B7/00 , G11B7/004
摘要： PURPOSE:To prevent the destruction of a preformated part due to a long pitting or a wide pitting by always keeping the polarity of the recording signal at the non-pit side at the end of the data in the case of discontinuous informations. CONSTITUTION:The discontinuous information is converted into an NRZI (pit edge) signal and recorded by the light beam like a laser, etc., with use of a recording means which adds a signal whose polarity is always set at the non-pit side to the NRZI signal at each termination of the discontinuous information. That is, the recording means contains an NRZI encoder 4 which converts the discontinuous information into an NRZI signal and a data termination detecting means 6 which detects the termination of the discontinuous information. Therefore the polarity of the recording signal is inverted and a signal having the polarity of the non-pit side is added when the final termination of the discontinuous information ends at the pit side. Then the polarity of the signal is not inverted when the final termination of the discontinuous information ends at the non-pit side. In both cases, the polarity of the light beam is set in a non- illumination state. Thus it is possible to evade such inconvenient cases where the data on the next sector is destroyed and no servo operation is applied owing to occurrence of a wide pit.

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