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公开(公告)号：US06741533B1
公开(公告)日：2004-05-25
申请号：US09830676
申请日：2001-08-06
IPC分类号： G11B700
CPC分类号： G11B7/0901 , G11B7/0906
摘要： A tracking error detecting apparatus converts photoelectric current obtained by a photo detector into voltage signals at current/voltage conversion circuits, and adds the voltage signals to generate two signal series at adders. The two signal series are digitalized at analog to digital converters, are subjected to interpolation processing at interpolation filters and have their zero cross points detected by zero cross point detector circuits respectively. A phase difference between the zero cross points of the two signal series is detected by a phase difference detector circuit, and the phase difference is subjected to band restriction by a low pass filter, thereby to obtain a tracking error signal. The tracking error detecting apparatus is capable of coping with speed doubling of an optical recording/reproducing apparatus and density enhancing of an optical recording medium with a small size and at low cost.
摘要翻译： 跟踪误差检测装置将由光电检测器获得的光电流转换成电流/电压转换电路的电压信号，并将加上电压信号生成两个信号序列。 两个信号系列在模数转换器中进行数字化处理，分别在内插滤波器处进行插值处理，并由零交叉点检测器电路分别检测其零交叉点。 通过相位差检测电路检测两个信号序列的零交叉点之间的相位差，通过低通滤波器对相位差进行频带限制，从而获得跟踪误差信号。 跟踪误差检测装置能够应付光学记录/再现装置的加倍倍数和小尺寸和低成本的光学记录介质的密度增强。
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公开(公告)号：US07012862B2
公开(公告)日：2006-03-14
申请号：US10196382
申请日：2002-07-17
申请人： Takashige Hiratsuka
发明人： Takashige Hiratsuka
IPC分类号： G11B7/095
CPC分类号： G11B7/0906
摘要： A tracking error detection apparatus includes a phase error detection unit for detecting a phase error of an output signal according to the amount of reflected light that is obtained when a light beam is applied to an information recording medium and a low-band pass unit for performing band restriction to obtain a tracking error signal from the phase error signal. The tracking error detection apparatus also includes a clock generation unit for generating a clock and a clock control unit having a frequency divider for generating a frequency-divided clock of the clock that is generated by the clock generation unit, wherein the clock control unit uses the frequency-divided clock as an operation clock for the tracking error detection apparatus. Therefore, the operation rate of each unit when generating a tracking error signal can be reduced, whereby a reduction in power consumption is achieved.
摘要翻译： 跟踪误差检测装置包括：相位误差检测单元，用于根据当将光束施加到信息记录介质时获得的反射光的量来检测输出信号的相位误差;以及用于执行的低通带单元 频带限制，以从相位误差信号中获得跟踪误差信号。 跟踪误差检测装置还包括用于产生时钟的时钟产生单元和具有用于产生由时钟产生单元生成的时钟的分频时钟的分频器的时钟控制单元，其中时钟控制单元使用 分频时钟作为跟踪误差检测装置的操作时钟。 因此，可以减少在产生跟踪误差信号时每个单元的操作速率，从而实现功耗的降低。
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3.发明申请Address signal position detection apparatus, optical disk playback apparatus, and address signal position detection method 失效地址信号位置检测装置，光盘播放装置和地址信号位置检测方法公开(公告)号：US20050099911A1
公开(公告)日：2005-05-12
申请号：US10981529
申请日：2004-11-05
申请人： Takashige Hiratsuka
发明人： Takashige Hiratsuka
CPC分类号： G11B7/00718 , G11B7/0053
摘要： The address signal position detection apparatus comprises a photodetector, a first and second adders which generate, from the output signals from the photodetector, two signal sequences whose phases change from each other according to a tracking error of a light spot, a phase difference detection circuit for detecting the phase difference from the two signal sequences, and a phase difference signal processing unit which generates an address signal position using the phase difference signal detected by the phase difference detection circuit, and detects an address signal position by providing threshold values with respect to the detected phase difference, thereby enabling a stable detection of the address signal position even when a DC symmetry in a difference signal of a reproduced signal is imperfect in an optical disk using the land/groove recoding method.
摘要翻译： 地址信号位置检测装置包括光电检测器，第一和第二加法器，其根据来自光电检测器的输出信号产生根据光点的跟踪误差相位彼此改变的两个信号序列，相位差检测电路 用于检测来自两个信号序列的相位差;以及相位差信号处理单元，其使用由相位差检测电路检测的相位差信号产生地址信号位置，并且通过提供相对于 检测到的相位差，从而即使当使用槽脊/凹槽记录方法的光盘中再现信号的差分信号中的直流对称性不完美时，也能够稳定地检测地址信号位置。
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公开(公告)号：US20090185468A1
公开(公告)日：2009-07-23
申请号：US11916401
申请日：2006-05-30
IPC分类号： G11B20/18
CPC分类号： G11B7/0948 , G11B7/0906 , G11B7/094
摘要： A phase error detection apparatus capable of performing offset correction of a tracking error signal accurately even when there is a defect or a non-recorded position on an optical disc. There are provided a phase difference detection circuit (107) which receives two sequences of digital signals, performs phase comparison using a distance between zerocross points of the two sequences of digital signals, and outputs a phase comparison result PCR and a phase comparison completion signal PCC, and an offset control circuit (11) which outputs an offset correction amount for each phase comparison completion signal PCC from the phase difference detection circuit (107), and the offset correction amount Δα is added to the phase comparison result PCR to avoid offset correction in a position where phase comparison is not carried out.
摘要翻译： 一种相位误差检测装置，即使在光盘上存在缺陷或非记录位置，也能够精确地进行跟踪误差信号的偏移校正。 提供了一个接收两个数字信号序列的相位差检测电路（107），使用两个数字信号序列的零交点之间的距离进行相位比较，并输出相位比较结果PCR和相位比较完成信号PCC ，以及偏移控制电路（11），其从相位差检测电路（107）输出每个相位比较完成信号PCC的偏移校正量，并将偏移校正量Δα加到相位比较结果PCR中以避免偏移校正 在不进行相位比较的位置。
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公开(公告)号：US20060120252A1
公开(公告)日：2006-06-08
申请号：US10542342
申请日：2004-03-20
IPC分类号： G11B7/00
摘要： An optical disc device according to the present invention is provided with, as shown in FIGS. 1 and 2, a high frequency band processing circuit for removing low frequency components of signals outputted from plural photodetectors of a pickup, and generating various kinds of signals required for recording/playback of an optical disc by digital processing after performing AD conversion by a high-speed low-bit AD converter; and a low frequency band processing circuit for removing high frequency components of the signals outputted from the respective photodetectors of the pickup, and generating various kinds of signals required for recording/playback of an optical disc by digital processing after performing AD conversion by a low-speed high-bit time-division AD converter. Thereby, various kinds of signals required for recording/playback of an optical disc can be generated using a single circuit, whereby the product cost, power consumption, and circuit scale can be reduced.
摘要翻译： 根据本发明的光盘装置，如图1和图2所示。 如图1和图2所示，用于去除从拾取器的多个光电检测器输出的信号的低频分量的高频带处理电路，并且在执行AD转换之后通过数字处理产生用于记录/重放光盘所需的各种信号 低速AD转换器; 以及低频带处理电路，用于去除从拾取器的各个光电探测器输出的信号的高频分量，并且通过数字处理在通过低通滤波器执行AD转换之后产生用于记录/重放光盘所需的各种信号， 高速高分时分AD转换器。 因此，可以使用单个电路来生成光盘的记录/重放所需的各种信号，由此可以降低产品成本，功耗和电路规模。
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6.发明授权Address signal position detection apparatus, optical disk playback apparatus, and address signal position detection method 失效地址信号位置检测装置，光盘播放装置和地址信号位置检测方法公开(公告)号：US07385887B2
公开(公告)日：2008-06-10
申请号：US10981529
申请日：2004-11-05
申请人： Takashige Hiratsuka
发明人： Takashige Hiratsuka
IPC分类号： G11B7/00
CPC分类号： G11B7/00718 , G11B7/0053
摘要： The address signal position detection apparatus comprises a photodetector, a first and second adders which generate, from the output signals from the photodetector, two signal sequences whose phases change from each other according to a tracking error of a light spot, a phase difference detection circuit for detecting the phase difference from the two signal sequences, and a phase difference signal processing unit which generates an address signal position using the phase difference signal detected by the phase difference detection circuit, and detects an address signal position by providing threshold values with respect to the detected phase difference, thereby enabling a stable detection of the address signal position even when a DC symmetry in a difference signal of a reproduced signal is imperfect in an optical disk using the land/groove recoding method.
摘要翻译： 地址信号位置检测装置包括光电检测器，第一和第二加法器，其根据来自光电检测器的输出信号产生根据光点的跟踪误差相位彼此改变的两个信号序列，相位差检测电路 用于检测来自两个信号序列的相位差;以及相位差信号处理单元，其使用由相位差检测电路检测的相位差信号产生地址信号位置，并且通过提供相对于 检测到的相位差，从而即使当使用槽脊/凹槽记录方法的光盘中再现信号的差分信号中的直流对称性不完美时，也能够稳定地检测地址信号位置。
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公开(公告)号：US08111596B2
公开(公告)日：2012-02-07
申请号：US11916401
申请日：2006-05-30
IPC分类号： G11B7/09
CPC分类号： G11B7/0948 , G11B7/0906 , G11B7/094
摘要： A phase error detection apparatus capable of performing offset correction of a tracking error signal accurately even when there is a defect or a non-recorded position on an optical disc. There are provided a phase difference detection circuit (107) which receives two sequences of digital signals, performs phase comparison using a distance between zerocross points of the two sequences of digital signals, and outputs a phase comparison result PCR and a phase comparison completion signal PCC, and an offset control circuit (11) which outputs an offset correction amount for each phase comparison completion signal PCC from the phase difference detection circuit (107), and the offset correction amount Δα is added to the phase comparison result PCR to avoid offset correction in a position where phase comparison is not carried out.
摘要翻译： 一种相位误差检测装置，即使在光盘上存在缺陷或非记录位置，也能够精确地进行跟踪误差信号的偏移校正。 提供了一个接收两个数字信号序列的相位差检测电路（107），使用两个数字信号序列的零交点之间的距离进行相位比较，并输出相位比较结果PCR和相位比较完成信号PCC 以及从相位差检测电路（107）输出每个相位比较完成信号PCC的偏移校正量的偏移控制电路（11），并将偏移校正量＆amp;αgr加到相位比较结果PCR中以避免 在不执行相位比较的位置的偏移校正。
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公开(公告)号：US07995448B2
公开(公告)日：2011-08-09
申请号：US10542342
申请日：2004-03-26
IPC分类号： G11B7/00
摘要： An optical disc device including a high frequency band processing circuit for removing low frequency components of signals outputted from plural photodetectors of a pickup, and generating various kinds of signals required for recording/playback of an optical disc by digital processing after performing AD conversion by a high-speed low-bit AD converter; and a low frequency band processing circuit for removing high frequency components of the signals outputted from the respective photodetectors of the pickup, and generating various kinds of signals required for recording/playback of an optical disc by digital processing after performing AD conversion by a low-speed high-bit time-division AD converter.
摘要翻译： 一种光盘装置，包括用于去除从拾取器的多个光电检测器输出的信号的低频分量的高频带处理电路，并且通过数字处理在通过一个或多个转换器进行AD转换之后通过数字处理产生记录/重放光盘所需的各种信号 高速低位AD转换器; 以及低频带处理电路，用于去除从拾取器的各个光电探测器输出的信号的高频分量，并且通过数字处理在通过低通滤波器执行AD转换之后产生用于记录/重放光盘所需的各种信号， 高速高分时分AD转换器。
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9.发明授权Tracking error detection apparatus including reduction in false tracking error detection during phase error detection 失效跟踪误差检测装置，包括在相位误差检测期间减少伪跟踪误差检测公开(公告)号：US07289399B2
公开(公告)日：2007-10-30
申请号：US10814182
申请日：2004-04-01
申请人： Takashige Hiratsuka
发明人： Takashige Hiratsuka
IPC分类号： G11B7/00
CPC分类号： G11B7/0906
摘要： A tracking error detection apparatus comprises a photodetector comprising plural photoreceptor elements; zerocross detection circuits for detecting zerocross points at which two sequences of digital signals intersect the center levels of the respective digital signals, which digital signals are generated according to the amounts of light received by the respective photoreceptor elements and are outputted from the photodetector; a phase difference detection circuit for performing phase comparison using a distance between zerocross points of the two sequences of digital signals, and outputting a result of phase comparison; and a low-pass filter for performing band restriction to a signal outputted from the phase difference detection circuit. When a phase difference between the two sequences of digital signals, which is detected by the phase difference detection circuit, is larger than a maximum value of a theoretical tracking error signal, the output from the phase difference detection circuit is limited.
摘要翻译： 跟踪误差检测装置包括：包含多个感光元件的光电检测器; 用于检测十字交叉点的十相交检测电路，其中两个数字信号序列与各个数字信号的中心电平相交，该数字信号根据由各个感光元件接收的光量产生并从光电检测器输出; 相位差检测电路，用于使用两个数字信号序列的零交点之间的距离进行相位比较，并输出相位比较的结果; 以及对从相位差检测电路输出的信号进行频带限制的低通滤波器。 当由相位差检测电路检测到的两个数字信号序列之间的相位差大于理论跟踪误差信号的最大值时，来自相位差检测电路的输出被限制。
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公开(公告)号：US07239583B2
公开(公告)日：2007-07-03
申请号：US10809486
申请日：2004-03-26
IPC分类号： G11B7/00
CPC分类号： G11B7/0906
摘要： A tracking error detection apparatus comprises a phase difference detection circuit for receiving two sequences of digital signals, and performing phase comparison using a distance between zerocross points of the two sequences of digital signals to output a result of phase comparison, and an LPF for generating a tracking error signal from the result of phase comparison. The phase difference detection circuit does not carry out phase composition in a position that is not appropriate as a target position to perform phase comparison, and outputs the result of phase comparison as a pulse signal corresponding to one sampling clock. Therefore, even when a disc is played at CAV or a flaw or the like exists on the disc, an accurate tracking error signal can be detected.
摘要翻译： 跟踪误差检测装置包括用于接收两个数字信号序列的相位差检测电路，并且使用两个数字信号序列的零交点之间的距离进行相位比较，以输出相位比较的结果;以及LPF，用于产生 从相位比较结果跟踪误差信号。 相位差检测电路在不适合作为目标位置的位置进行相位合成，进行相位比较，并输出相位比较结果作为对应于一个取样时钟的脉冲信号。 因此，即使当在CAV上播放盘或盘上存在缺陷等时，也可以检测到精确的跟踪误差信号。
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