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1. 发明专利

JPH07302469A DISK REPRODUCING DEVICE 失效
公开(公告)号：JPH07302469A
公开(公告)日：1995-11-14
申请号：JP9501994
申请日：1994-05-09
申请人： HITACHI LTD
发明人： KIMURA IZUMI , TADOKORO HIROSHI , TAKEUCHI TOSHIFUMI
IPC分类号： G11B20/10
摘要： PURPOSE:To enable generating the clock having a frequency corresponding to a transmission rate by correcting a deviated amount with a correction device in the case the oscillation frequency of an oscillator is not an integer multiple of the frequency of the transmission rate. CONSTITUTION:A speed control circuit 13 allows a disk 1 to be rotated by a motor 2 via a driving circuit 4 under the control of a system control microcomputer 16. At the same time, the system control microcomputer 16 reads out the signal having the pulse width of the integer multiple of the cycle T of a frequency f1 corresponding to the transmission rate from the disk 1 with a pickup 5 by driving and controlling the pickup 5 via a pickup servo 3 and inputs this as an input signal to a CD signal processing circuit 15 via a preamplifier 6. The circuit 15 operates with the clock obtained by frequency-dividing the output of an oscillator 9 having an oscillation frequency F2 which is not the integer multiple of the frequency f1 corresponding to the transmission rate. Then, the digital generation circuit of a clock generating circuit 10 generates the clock having the frequency f1 from the output of the oscillator having the oscillation frequency F2.

2. 发明专利

JPH07254218A PULSE-WIDTH-INFORMATION GENERATING CIRCUIT AND DISK REPRODUCING DEVICE USING THE CIRCUIT THEREOF 失效
公开(公告)号：JPH07254218A
公开(公告)日：1995-10-03
申请号：JP4671394
申请日：1994-03-17
申请人： HITACHI LTD
发明人： TADOKORO HIROSHI , KIMURA IZUMI , TAKEUCHI TOSHIFUMI
IPC分类号： G11B19/28 , G11B19/247
摘要： PURPOSE:To perform an operation at the speed of 2n times by forming an information code by using a correcting value, and outputting the accurate pulse width. CONSTITUTION:When a signal 8 for counting a pulse width is inputted, the rising and falling edges of the signal 8 are detected by using a frequency dividing clock 7 in a detecting part 1, and a detected signal 9 is obtained. The signal 9 is inputted into a comparing and judging part 2, and a judged signal 10 indicating the presence/absence of correction is obtained. The signal 9 is inputted into a correcting part 4, and a polarity signal 11 for correction, which judges whether positive or negative correction is to be performed is obtained. Information 13 of a counter 3, which counts the pulse width of the signal 8 is corrected based on the judged signal 10 and a polarity signal 11, and the accurate pulse- width information is outputted.

3. 发明专利

JP2000149446A DISK REPRODUCING DEVICE AND ITS INTEGRATED CIRCUIT 失效
公开(公告)号：JP2000149446A
公开(公告)日：2000-05-30
申请号：JP2000003714
申请日：2000-01-12
申请人： HITACHI LTD
发明人： KIMURA IZUMI , NISHIOKA MUNEHIRO , TAKEUCHI TOSHIFUMI , TADOKORO HIROSHI
IPC分类号： G11B20/10 , G11B19/02
摘要： PROBLEM TO BE SOLVED: To cope with not only an intermittent access owing to track jumping in a conventional CD reproducing system but also standard speed reproduction at the time of operation at a N times speed. SOLUTION: This device is provided with a memory 11 in which data reproduced from a disk 1 and correspondent temporal information are written together, and, further, an outer memory 15. In this case, the time difference between data 17 finally outputted and data 13 during access is detected by a temporal information detecting circuit 18 in an address control circuit 19, an overflow and an underflow of the outer memory 15 are detected, the writing in the outer memory 15 is controlled based on this detected result, even when an intermittent access is performed by controlling a pickup 4, the time different between system operation speed and data output speed is absorbed, and continuous data 17 being coupled normally are obtained at the time of output.

4. 发明专利

JP2005166255A Disk reproducing device and its integrated circuit 有权
标题翻译：磁盘复制设备及其集成电路
公开(公告)号：JP2005166255A
公开(公告)日：2005-06-23
申请号：JP2005003304
申请日：2005-01-11
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIMURA IZUMI , NISHIOKA MUNEHIRO , TAKEUCHI TOSHIFUMI , TADOKORO HIROSHI
IPC分类号： G11B20/10
摘要： PROBLEM TO BE SOLVED: To deal with standard speed reproduction in an N-time faster high speed operation mode as well as an intermittent access caused by track-jumping in a conventional CD reproduction system.
SOLUTION: A disk reproducing device is provided with a memory 11 for writing data reproduced from a disk 1 and time information together in correspondence, and another external memory 15. A time difference between data 17 to be finally outputted and data 13 under access is detected in a time information detection circuit 18 of an address control circuit 19 to detect the overflow and underflow of the external memory 15. The write of the external memory 15 is controlled on the basis of the detected result. The correctly connected and continued data 17 are obtained at the time of output by absorbing the time difference between a system operation speed and a data output speed even in the case of performing the intermittent access by controlling a pickup 4.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：处理在N倍快速高速运行模式中的标准速度再现以及由常规CD再现系统中由跳跃引起的间歇访问。解决方案：一个盘再现装置设置有用于将从盘1再现的数据和对应的时间信息一起写入的存储器11和另一个外部存储器15.最后输出的数据17和下面的数据13之间的时间差在地址控制电路19的时间信息检测电路18中检测出访问，以检测外部存储器15的上溢和下溢。根据检测结果来控制外部存储器15的写入。即使在通过控制拾取器4执行间歇访问的情况下，通过吸收系统操作速度和数据输出速度之间的时间差，在输出时获得正确连接和连续数据17.版权所有（ C）2005，JPO＆NCIPI

5. 发明专利

JP2004087128A Disk reproducing device and method for reproducing disk 审中-公开
标题翻译：磁盘重现装置和再现磁盘的方法
公开(公告)号：JP2004087128A
公开(公告)日：2004-03-18
申请号：JP2003415871
申请日：2003-12-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIMURA IZUMI , NISHIOKA MUNEHIRO , TAKEUCHI TOSHIFUMI , TADOKORO HIROSHI
IPC分类号： G11B20/10
摘要： PROBLEM TO BE SOLVED: To make it possible to cope with standard speed reproduction in N-speed operation as well as intermittent access caused by track skip in a conventional CD reproduction system.
SOLUTION: A disk reproducing device is provided with a memory 11 complying data reproduced from a disk 1 with time information and writing the data and the time information, and another external memory 15, so that time difference between the finally outputted data 17 and the data 13 in the course of access is detected by means of the time information detection circuit 18 of an address control circuit 19 to detect the overflow and underflow of the external memory 15, and the writing to the external memory 15 is controlled based on the detection result, the time difference between system operation speed and data output speed is absorbed even when the intermittent access is done by controlling a pickup 4, so as to obtain the continued data 17 correctly connected at the time of output.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：在常规CD再现系统中，可以应对N速操作中的标准速度再现以及由轨道跳过引起的间歇性访问。解决方案：一个盘再现装置具有一个存储器11，该存储器11符合从盘1再现的具有时间信息并且写入数据和时间信息的数据，以及另一个外部存储器15，使得最终输出数据17 并且通过地址控制电路19的时间信息检测电路18检测访问过程中的数据13，以检测外部存储器15的溢出和下溢，并且基于对外部存储器15的写入进行控制即使通过控制拾取器4进行间歇访问，也可以检测出系统运行速度与数据输出速度之间的时间差，从而获得在输出时正确连接的连续数据17。版权所有（C）2004，JPO

6. 发明专利

JPH06275019A OUTPUT RATE CONVERSION FUNCTION INCORPORATED DISK REPRODUCING DEVICE AND ITS INTEGRATED CIRCUIT 失效
公开(公告)号：JPH06275019A
公开(公告)日：1994-09-30
申请号：JP21289493
申请日：1993-08-27
申请人： HITACHI LTD
发明人： KIMURA IZUMI , NISHIOKA MUNEHIRO , TAKEUCHI TOSHIFUMI , TADOKORO HIROSHI
IPC分类号： G11B20/10
摘要： PURPOSE:To facilitate a counter measure against an intermittent access caused by a track jump in a conventional CD reproducing system and to accommodate a standard speed reproducing during an N time speed operation. CONSTITUTION:A memory 11, which writes the data reproduced from a disk 1 with time information, and an additional external memory 15 are provided. The timing difference between data 17 which are lastly outputted and data 13 which are being accessed is detected by a timing information detecting circuit 18 of an address control circuit 19 so as to detect an overflow and a underflow of the memory 15. Based on the detection results, the writing of the memory 15 is controlled, the timing difference between a system operation speed and a data output speed is absorbed even though an intermittent access is executed by controlling a pickup 4 so as to obtain the data 17 which are correctly connected and continuous at the output.

7. 发明专利

JP2001052347A OPTICAL DISK DRIVE 失效
公开(公告)号：JP2001052347A
公开(公告)日：2001-02-23
申请号：JP22362499
申请日：1999-08-06
申请人： HITACHI LTD
发明人： ISHII MIKIHIKO , SATO HIDEAKI , ISO YOSHIMI , TADOKORO HIROSHI , SOMA KAZUAKI
IPC分类号： G11B7/085 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide a technology for stable servo acquisition of tracking of low frequency by obtaining a stable brake signal. SOLUTION: A waveform shaping circuit 515 shapes the waveform of a tracking error signal, before a phase compensating circuit 517 compensates the phase, an edge detecting circuit 516 performs edge detection, and a latch circuit 513 latches the output signal of the waveform shaping circuit 512, according to the edge detection signal and supplies its output signal to a latch circuit 514, so that even if the phase is delayed, brake pulses can correctly be generated by making the latch operation of the latch circuit 514 accurate, and consequently the tracking servo acquisition of low frequency is stabilized.

8. 发明专利

JPH06203483A DEVICE AND METHOD FOR REPRODUCING DIGITAL SIGNAL AND INTEGRATED CIRCUIT USED FOR IT 失效
公开(公告)号：JPH06203483A
公开(公告)日：1994-07-22
申请号：JP21420093
申请日：1993-08-30
申请人： HITACHI LTD
发明人： TAKEUCHI TOSHIFUMI , OBATA SHINICHI , KIMURA IZUMI , KAWAMAE OSAMU , TADOKORO HIROSHI , NAGAI YUTAKA
IPC分类号： G11B20/10 , G11B20/14 , G11B20/18 , G11B27/36 , H03L7/107
摘要： PURPOSE:To obtain a device with high reliability of data by normally selecting an analog data strobe circuit and selecting a digital data strobe circuit at the time of omitting data due to a damage. CONSTITUTION:When e.g. the phase of the reproducing clock of the digital data strobe circuit 5 is delayed for the phase of the reproducing clock of the analog data strobe circuit 4, the delay of the reproducing clock of the digital data strobe circuit 5 is detected by comparing by a phase comparator incorporated in a switch timing generation circuit 200. Thus, a data strobe switching signal is generated by the switch timing generation circuit 200 synchronizing with the falling edge of the reproducing clock of the delayed digital data strobe circuit 5, and the inconvenience in the clock after switched is prevented.

9. 发明专利

JP2004259437A Disk player and its integrated circuit 审中-公开
标题翻译：磁盘播放器及其集成电路
公开(公告)号：JP2004259437A
公开(公告)日：2004-09-16
申请号：JP2004129209
申请日：2004-04-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIMURA IZUMI , NISHIOKA MUNEHIRO , TAKEUCHI TOSHIFUMI , TADOKORO HIROSHI
IPC分类号： G11B20/10
摘要： PROBLEM TO BE SOLVED: To make a disk player able to deal with standard-speed reproduction in an N-time faster high speed operation mode as well as an intermittent access caused by track-jumping in the conventional CD (Compact Disk) play-back systems.
SOLUTION: The disk player is provided with a memory 11 writing data reproduced from a disk 1 and time information by making the data corresponding to the time information, and another external memory 15. and detects the time difference between the finally outputted data 17 and the data 13 under access by means of a time information detection circuit 18 of an address control circuit 19 to detect the overflow and underflow of the external memory 15. Writing on the external memory 15 is controlled based on the detection result. The data 17 correctly connected and continued is obtained in an output mode by absorbing the time difference between system operation speed and data output speed even if the intermittent access is done by controlling a pickup 4.
COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：为了使磁盘播放机能够以N倍快速的高速操作模式处理标准速度再现以及由传统CD（压缩盘）中的跟踪跳跃引起的间歇访问，播放系统解决方案：盘播放器设置有存储器11，其通过使与时间信息相对应的数据和另一外部存储器15写入从盘1再现的数据和时间信息，并且检测最终输出的数据之间的时间差 17和通过地址控制电路19的时间信息检测电路18访问的数据13，以检测外部存储器15的溢出和下溢。基于检测结果来控制对外部存储器15的写入。通过吸收系统操作速度和数据输出速度之间的时间差，即使通过控制拾取器4进行间歇访问，也可以在输出模式中获得正确连接和连续的数据17。（C）2004，JPO＆NCIPI

10. 发明专利

JP2004006041A DISK PLAYER 审中-公开
公开(公告)号：JP2004006041A
公开(公告)日：2004-01-08
申请号：JP2003290501
申请日：2003-08-08
申请人： HITACHI LTD
发明人： KIMURA IZUMI , NISHIOKA MUNEHIRO , TAKEUCHI TOSHIFUMI , TADOKORO HIROSHI
IPC分类号： G11B20/10
摘要： PROBLEM TO BE SOLVED: To provide a disk player compatible with standard speed reproduction in an N-hold speed operation mode as well as intermittent access due to track skipping in a conventional CD playback system. SOLUTION: A memory 11 to which data reproduced from a disk 1 are written together with time information while they are associated with each other is arranged, and in addition, another external memory 15 is positioned. A time information detection circuit 18 of an address control circuit 19 detects a time difference between the final data 17 to be outputted and data 13 under access, to detect an overflow and an underflow of the external memory 15. Writing to the external memory 15 is controlled on the basis of the detection results. Even when a pickup 4 is controlled to make intermittent access, a time difference between a system operating speed and a data outputting speed is absorbed to acquire correctly connected data 17 when outputted. COPYRIGHT: (C)2004,JPO

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