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1. 发明专利

JP2008226363A Reproduction device and reproduction method of recording medium 审中-公开
标题翻译：记录介质的再现设备和再现方法
公开(公告)号：JP2008226363A
公开(公告)日：2008-09-25
申请号：JP2007063980
申请日：2007-03-13
申请人： Sony Corp , ソニー株式会社
发明人： TATENO TATSUYA , HAYASHI KENICHI
IPC分类号： G11B20/14
CPC分类号： G11B20/10009 , G11B20/10055 , G11B2020/1287 , G11B2220/2537
摘要： PROBLEM TO BE SOLVED: To provide a reproduction device and reproduction method of a recording medium for improving accuracy in detecting a frame synchronization signal by reliably detecting a synchronization pattern.
SOLUTION: The device has a first binarization part which binarizes a signal read from the recording medium by PRML processing, a second binarization part which binarizes the signal according to the difference from a predetermined threshold, a first frame synchronization signal detection part which detects the synchronization pattern from a first binarized data string obtained by the first binarization part, and a second frame synchronization signal detection part which detects the synchronization pattern from a second binarized data string obtained by the second binarization part. When the synchronization pattern is not detected by the first frame synchronization signal detection part, a signal detected by the second frame synchronization signal detection part is adopted as the frame synchronization signal.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于通过可靠地检测同步模式来提高帧同步信号的检测精度的记录介质的再现装置和再现方法。解决方案：该装置具有将通过PRML处理从记录介质读取的信号二进制化的第一二值化部分，根据与预定阈值的差二进制信号的第二二值化部分，第一帧同步信号检测部分从由第一二值化部分获得的第一二进制数据串检测同步模式;以及第二帧同步信号检测部，其从由第二二值化部获得的第二二进制数据串检测同步模式。当第一帧同步信号检测部分未检测到同步模式时，采用由第二帧同步信号检测部分检测的信号作为帧同步信号。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2007334954A Reproducing device and method 有权
标题翻译：再现设备和方法
公开(公告)号：JP2007334954A
公开(公告)日：2007-12-27
申请号：JP2006163410
申请日：2006-06-13
申请人： Sony Corp , ソニー株式会社
发明人： HAYASHI KENICHI
IPC分类号： G11B20/14
CPC分类号： G11B20/24 , G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10101 , G11B20/10111 , G11B20/10212 , G11B20/10222 , G11B20/10296 , G11B20/10425 , G11B20/14 , G11B2020/1239 , G11B2020/1268 , G11B2020/1274 , G11B2020/1287 , G11B2020/1453 , G11B2220/2541
摘要： PROBLEM TO BE SOLVED: To improve reproduction performance by dealing with bit errors caused by waveform distortion during reproduction of a recording medium of low recording signal quality when a PRML system is used.
SOLUTION: In consideration that distortion occurring in a recording medium such as an optical disk and the operation of a maximum-likelihood decoding part, the amplitude value of an equalizing signal is evaluated (signal input to the maximum-likelihood decoding part) corresponding to a shortest code detected by the maximum-likelihood decoding part, to determine whether the decoded shortest code is correct. When the result of the determination indicates an error, the decoded shortest code is corrected, so that, a bit error rate is improved for a distorted signal as compared with a normal signal detection by maximum-likelihood decoding.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：当使用PRML系统时，通过处理在低记录信号质量的记录介质的再现期间由波形失真引起的位错误来提高再现性能。考虑到在诸如光盘的记录介质中发生的失真和最大似然解码部分的操作，评估均衡信号的振幅值（输入到最大似然解码部分的信号）对应于由最大似然解码部分检测的最短码，以确定解码的最短码是否正确。当确定结果指示错误时，解码的最短代码被校正，使得与通过最大似然解码的正常信号检测相比，畸变信号的误码率得到改善。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2007323765A Reproducing apparatus and synchronous signal detecting method 有权
标题翻译：重现装置和同步信号检测方法
公开(公告)号：JP2007323765A
公开(公告)日：2007-12-13
申请号：JP2006154747
申请日：2006-06-02
申请人： Sony Corp , ソニー株式会社
发明人： TATENO TATSUYA , HAYASHI KENICHI
IPC分类号： G11B20/14
CPC分类号： G11B20/1403 , G11B20/10009 , G11B20/10111 , G11B20/1426 , G11B2020/1453 , G11B2220/2541
摘要： PROBLEM TO BE SOLVED: To provide a synchronous signal detecting method having improved frame synchronism detecting capability capable of surely detecting a synchronous signal, and a reproducing apparatus capable of achieving stable data reproduction. SOLUTION: When synchronous pattern are set as patterns where unique runlengths (9T) are continuous, a pattern appearing in a binary data column obtained by reading from a recording medium is compared with a plurality of types of detection patterns (P1 to P11) each set as a pattern having at least one unique runlength (9T), and when the pattern appearing in the binary data column matches with at least one detection pattern, a synchronous signal is detected. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有能够可靠地检测同步信号的具有改进的帧同步检测能力的同步信号检测方法和能够实现稳定的数据再现的再现装置。解决方案：当同步模式被设置为连续的游程长度（9T）的模式时，将通过从记录介质读取而获得的二进制数据列中出现的模式与多种类型的检测模式进行比较（P1至P11 ）各自设置为具有至少一个唯一游程长度（9T）的模式，并且当出现在二进制数据列中的模式与至少一个检测模式匹配时，检测到同步信号。版权所有（C）2008，JPO＆INPIT

4. 发明专利

JP2001236654A DISK DEVICE 失效
公开(公告)号：JP2001236654A
公开(公告)日：2001-08-31
申请号：JP2000046832
申请日：2000-02-18
申请人： SONY CORP
发明人： HAYASHI KENICHI
IPC分类号： G11B20/10 , G11B7/005
摘要： PROBLEM TO BE SOLVED: To reduce the cost and power consumption by reducing the circuit scale in the manner of making a waveform equalizer in common, which is used for the detection of data and the detection of a sector mark. SOLUTION: The disk device 10 is provided with a level adjusting part 11 for adjusting the amplitude value of a reproduced signal, the waveform equalizer 12 for applying the waveform equalizing process to the reproduced signal, a data detector 13 for detecting the data from an equalized signal which is supplied from this waveform equalizer 12, a sector mark detector 14 for detecting the sector mark from the equalized signal supplied from the waveform equalizer 12, and a controller 15 for controlling the level adjusting part 11 and the sector mark detector 14.

5. 发明专利

JPH11195942A AUTOMATIC GAIN CONTROLLER 失效
公开(公告)号：JPH11195942A
公开(公告)日：1999-07-21
申请号：JP36106697
申请日：1997-12-26
申请人： SONY CORP
发明人： HAYASHI KENICHI , NARAHARA TATSUYA
IPC分类号： H03G3/30
摘要： PROBLEM TO BE SOLVED: To provide an automatic gain controller from which an output signal controlled to an optimum level is obtained even when an offset is produced in an input signal. SOLUTION: The automatic gain controller 10 is provided with a gain control amplifier 1 and a feedback circuit consisting of a full wave rectifier 2 applying full wave rectification to an output signal of the gain control amplifier 1, an amplitude error detector 3 that compares the output signal of the full wave rectifier 2 with a prescribed amplitude reference and that outputs the comparison result as an amplitude error signal, and of a control diagonal generating circuit 4 that generates a control signal to the gain control amplifier 1 based on the output signal from the amplitude error detector 3 and that provides an output of it to the gain control amplifier 1. The gain controller 10 is also provided with an offset detection circuit 5 that an absolute value of the offset from the output signal of the gain control amplifier 1, and with an arithmetic circuit 8 that subtracts the output signal of the offset detection circuit from any output signal of the feedback circuit.

6. 发明专利

JP2002074859A REPRODUCING DEVICE 失效
公开(公告)号：JP2002074859A
公开(公告)日：2002-03-15
申请号：JP2000254403
申请日：2000-08-24
申请人： SONY CORP
发明人： HAYASHI KENICHI
IPC分类号： G11B20/14
摘要： PROBLEM TO BE SOLVED: To control a PLL that generates a reproduction clock by detecting a signal defect included in a reproduced signal. SOLUTION: The reproducing device provided with a reproduction clock generating part 18 to generate a reproduction clock synchronized with the frequency of a reproduced signal, a rotation synchronous clock generating part 15 to generate a rotation synchronous clock from a rotation synchronous signal, a deciding part 21 to detect the difference between the frequency of the reproduction clock and the frequency of the rotation synchronous clock, and then to decide whether or not the difference of a detected frequency is within a prescribed range, a first phase signal detecting part 17 to detect a first phase signal, a second phase signal detecting part 19 to detect a second phase signal, and a switching part 20 to switch the first and second phase signals according to the determination of the deciding part 21.

7. 发明专利

JPH11195271A SIGNAL PROCESSOR 失效
公开(公告)号：JPH11195271A
公开(公告)日：1999-07-21
申请号：JP36106797
申请日：1997-12-26
申请人： SONY CORP
发明人： HAYASHI KENICHI , NARAHARA TATSUYA
IPC分类号： G11B20/10
摘要： PROBLEM TO BE SOLVED: To provide a signal processor capable of preventing the fluctuation of a DC component at the time of offset occurrence. SOLUTION: A signal processor 10 is provided with a maximum value detecting means 1 for detecting the maximum value of the voltage of an input signal, a minimum value detecting means 2 for detecting the minimum value of the voltage of the input signal, a first calculating means 3 for calculating the center value of the voltage of the input signal from the output signals of the maximum and minimum value detecting means 1 and 2, and a second calculating means 4 for subtracting the center value of the voltage calculated by the first calculating means 3 from the input signal and outputting the result thereof. By supplying the input signal and the output signal of the first calculating means 3 to the second calculating means 4, and causing the second calculating means 4 to subtract the center value of the voltage by the first calculating means 3 from the input signal and output the result thereof, a signal obtained by eliminating the fluctuation of the center value from the input signal is outputted.

8. 发明专利

JPH11191792A METHOD AND DEVICE FOR PROCESSING SIGNAL 失效
公开(公告)号：JPH11191792A
公开(公告)日：1999-07-13
申请号：JP35744097
申请日：1997-12-25
申请人： SONY CORP
发明人： HAYASHI KENICHI , NARAHARA TATSUYA
IPC分类号： G11B20/10 , H04B3/04 , H04L25/03
摘要： PROBLEM TO BE SOLVED: To improve performance for suppressing the waveform interference of a signal stream in the state of maintaining the stability of an AGC loop by comparing a level fluctuation value in the signal cycle of the signal sequence with a reference value, averaging the signal level fluctuation of the signal sequence through the adjustment on the preceding step side of an equalizer based on this result and controlling the reference value based on the signal level fluctuation value of an output signal from the equalizer. SOLUTION: In a signal processing circuit 2 of a digital signal recording and reproducing device, a gain is corrected by a first signal level control loop composed of a signal adjuster 21, first low-pass filter(LPF) 41, comparator 45 and third LPF 47 provided on the preceding step side rather than an equalizer 13 to generate signal delay concerning a signal level fluctuation component having jitter fluctuation in the repetition cycle equal with or faster than a frequency having the same repetition cycle as the basic cycle of a regenerative signal yk} in the fluctuation component of the regenerative signal yk}. Thus, even when quick-response gain correction is performed, this gain correction is not made unstable.

9. 发明专利

JPH06318237A DATA BASE RETRIEVING METHOD 失效
公开(公告)号：JPH06318237A
公开(公告)日：1994-11-15
申请号：JP13148093
申请日：1993-05-08
申请人： SONY CORP
发明人： SATO KATSUSHI , HAYASHI KENICHI
IPC分类号： G06F7/24 , G06F12/00 , G06F17/30 , G06F15/405
摘要： PURPOSE:To considerably shorten processing time in comparison with a conventional method in the case of sorting by adding an index expressing an order for sorting in the case of preparing a data base, and sorting data based on the index. CONSTITUTION:An index preparing device 10 rearranges slip data supplied from an input device 1 into a prescribed order, acids the index expressing the order to the slip data, rearranges the data base, to which this index is added, into the original order later and supplies the provided slip data to an external memory driving device 2 for driving an external memory 2a. In the case of retrieval, the data extracted by a retrieving means are rearranged based on the index. Thus, when sorting the retrieved result, respective items are not compared like the conventional data base retrieving method but it is enough only to compare the indexes, and time for sorting can be considerably shortened.

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