专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08705328B2 Read signal evaluation method, information recording and reading method, and information recording and reading apparatus 失效
标题翻译：读信号评估方法，信息记录读取方法以及信息记录读取装置
公开(公告)号：US08705328B2
公开(公告)日：2014-04-22
申请号：US13300783
申请日：2011-11-21
申请人： Atsushi Kikugawa
发明人： Atsushi Kikugawa
IPC分类号： G11B15/52
CPC分类号： G11B7/0065 , G11B20/10101 , G11B20/10296 , G11B2220/2504
摘要： A read signal evaluating means for ensuring compatibility in an optical phase multilevel recording and reading system is provided. In addition, a decoding means not large in circuit scale is provided. An optical phase is modulated based on user data, and phase information thus obtained is recorded in a recording medium. Then, the phase information recorded in the recording medium is optically read, and is converted into an electric signal. The signal is subjected to adaptive equalization and to partial response most-likely decoding. A shift in a time axis direction from a target wave of a predetermined pattern is detected from the read phase information and a statistical average is calculated. Meanwhile, a value of the phase read from the predetermined pattern is extracted from the read phase information and a statistical average is calculated.
摘要翻译：提供一种用于确保光学相位多级记录和读取系统中的兼容性的读取信号评估装置。此外，提供了不大的电路规模的解码装置。基于用户数据调制光学相位，并将由此获得的相位信息记录在记录介质中。然后，记录在记录介质中的相位信息被光学读取，并被转换成电信号。信号经受自适应均衡和部分响应最可能的解码。从读取的相位信息中检测从预定图案的目标波的时间轴方向的偏移，并计算统计平均值。同时，从读取的相位信息中提取从预定图案读取的相位的值，并且计算统计平均值。

2. 发明授权

US08081555B2 Method for evaluating read signal 有权
标题翻译：评估读取信号的方法
公开(公告)号：US08081555B2
公开(公告)日：2011-12-20
申请号：US12236653
申请日：2008-09-24
申请人： Takashi Kikukawa
发明人： Takashi Kikukawa
IPC分类号： G11B7/135
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10101 , G11B20/1012 , G11B20/10481 , G11B2220/2537
摘要： A method for evaluating a read signal obtained by irradiating a medium with a laser beam through an objective lens and reading data from the reflected laser beam by a PRML detection method is provided. The method includes: a sampling step of sampling the data obtained from the reflected laser beam at clock timings to obtain sampled values; and a step of, when a constraint length of a PR class in the PRML detection method is an even number, computing an intermediate sampled value for evaluation using at least adjacent two of the sampled values arranged in the order sampled at the clock timings. The provided method is an objective evaluation method when the PRML detection method is used, whereby the selection of a recording medium and a reading apparatus is facilitated.
摘要翻译：提供了一种用于评估通过用物镜照射激光束的介质并通过PRML检测方法从反射的激光束读取数据而获得的读取信号的方法。该方法包括：采样步骤，在时钟定时对从反射激光束获得的数据进行采样，以获得采样值; 以及当PRML检测方法中的PR类的约束长度是偶数时，使用在时钟定时采样的顺序中排列的至少相邻的两个采样值来计算用于评估的中间采样值的步骤。所提供的方法是当使用PRML检测方法时的客观评价方法，由此便于对记录介质和读取装置的选择。

3. 发明授权

US08059017B2 Code sequence generation method, modulation apparatus, modulation method, modulation program, demodulation apparatus, demodulation method, demodulation program and storage medium 失效
标题翻译：码序生成方法，调制装置，调制方式，调制程序，解调装置，解调方式，解调程序和存储介质
公开(公告)号：US08059017B2
公开(公告)日：2011-11-15
申请号：US11605583
申请日：2006-11-29
申请人： Satoru Higashino
发明人： Satoru Higashino
IPC分类号： H03M7/00
CPC分类号： H03M5/145 , G11B20/10083 , G11B20/10101 , G11B20/10111 , G11B20/1426
摘要： A modulation apparatus includes: a modulation section that modulates, in accordance with a correlation table where a data sequence with a predetermined number of bits is associated with a code sequence with a predetermined number of bits, the data sequence into the code sequence to allow a predetermined demodulation section to demodulate the code sequence into the data sequence in accordance with the correlation table, wherein the code sequence is, on NRZI method, a MSN code sequence where a null point of a frequency spectrum on a recording channel or communication channel of the code sequence is matched with a null point of a frequency spectrum of a PR equalized signal including the code sequence and a minimum run length is limited to be greater or equal to one.
摘要翻译：一种调制装置，包括：调制部，其根据相关表，其中具有预定位数的数据序列与预定位数的码序列相关联，将数据序列调制成码序列，以允许预定解调部分，用于根据相关表将码序列解调成数据序列，其中码序列是以NRZI方法的MSN码序列，其中在记录信道或通信信道上的频谱的零点代码序列与包括代码序列的PR均衡信号的频谱的零点匹配，并且最小游程长度被限制为大于或等于1。

4. 发明授权

US07852729B2 Optical disc apparatus with adjustable constraint length PRML 有权
标题翻译：具有可调约束长度PRML的光盘设备
公开(公告)号：US07852729B2
公开(公告)日：2010-12-14
申请号：US11092872
申请日：2005-03-30
申请人： Hiroyuki Minemura , Atsushi Kikugawa
发明人： Hiroyuki Minemura , Atsushi Kikugawa
IPC分类号： G11B27/30
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10101 , G11B20/10111 , G11B20/1012 , G11B2007/0006 , G11B2020/10879
摘要： An optical disc apparatus implementing a PRML and capable of recording and reading a plurality of disc media with different recording densities, wherein read compatibility between drives is ensured without relying solely on the error correction capability of the ECC (error correction code). A phase comparator provided in a PLL compares each value of an input signal sequence with a designated threshold value in order to determine an edge. The optical disc apparatus can record and read a plurality of disc media with different recording densities while ensuring read compatibility.
摘要翻译：实现PRML并能够记录和读取具有不同记录密度的多个盘介质的光盘装置，其中确保驱动器之间的读取兼容性，而不依赖于ECC（纠错码）的纠错能力。 PLL中提供的相位比较器将输入信号序列的每个值与指定的阈值进行比较，以便确定边缘。光盘装置可以记录和读取具有不同记录密度的多个光盘介质，同时确保读取兼容性。

5. 发明授权

US07852728B2 Digital signal reproducing apparatus 有权
标题翻译：数字信号再现装置
公开(公告)号：US07852728B2
公开(公告)日：2010-12-14
申请号：US11995634
申请日：2006-07-20
申请人： Youichi Ogura , Tatsushi Hiraki , Yorikazu Takao
发明人： Youichi Ogura , Tatsushi Hiraki , Yorikazu Takao
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10083 , G11B20/10101 , G11B20/10111 , G11B20/10222 , G11B20/1403 , G11B2020/1287 , G11B2220/2562 , G11B2220/2575
摘要： A digital signal reproducing apparatus includes an analog to digital converter for sampling and quantizing a signal read from an optical recording medium in accordance with a reproduced clock having a frequency which is one-half of a channel bit frequency and outputting an obtained digital RF signal, an offset compensation circuit for reducing an offset component in an amplitude direction from the digital RF signal, and a simplified interpolation filter for reconstructing a signal indicating a predetermined pattern recorded in the optical recording medium from the output signal of the offset compensation circuit and outputting the reconstructed signal. A control operation is performed to reduce the magnitudes of respective values shown by first phase error information on a section with the predetermined pattern and by second phase error information on a section other than the section with the predetermined pattern.
摘要翻译：一种数字信号再生装置，具有模拟数字转换器，用于根据具有频率为通道位频率的二分之一的频率的再生时钟对从光记录介质读取的信号进行采样和量化，并输出所获得的数字RF信号，偏移补偿电路，用于减少来自数字RF信号的振幅方向上的偏移分量;以及简化内插滤波器，用于根据偏移补偿电路的输出信号重建指示记录在光学记录介质中的预定模式的信号，并输出重建信号。执行控制操作以减小具有预定模式的部分上的第一相位误差信息所示的各个值的大小以及除了具有预定模式的部分之外的部分的第二相位误差信息。

6. 发明授权

US07826323B2 Reproducing apparatus and method with reduced bit error rate 失效
标题翻译：降低误码率的再现装置和方法
公开(公告)号：US07826323B2
公开(公告)日：2010-11-02
申请号：US11811927
申请日：2007-06-12
申请人： Kenichi Hayashi
发明人： Kenichi Hayashi
IPC分类号： G11B20/10
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： A reproducing apparatus includes a signal reading unit for reading a signal from a recording medium, an equalizing unit for performing partial response equalization on the read signal and outputting an equalized signal, a maximum likelihood decoding unit for performing maximum likelihood decoding on the equalized signal to decode binary data and outputting a binary data string, a determining unit for determining whether or not a shortest code in the binary data string obtained by the maximum likelihood decoding is correct, on the basis of information on an amplitude of the equalized signal corresponding to the shortest code, a code correcting unit for correcting the shortest code in the binary data string, in accordance with a result of the determination of the determination unit, and a data demodulating unit for demodulating the binary data string obtained through the code correcting unit to obtain reproduction data from the recording medium.
摘要翻译：一种再现装置，包括用于从记录介质读取信号的信号读取单元，用于对读取信号执行部分响应均衡并输出均衡信号的均衡单元，用于对均衡信号进行最大似然解码的最大似然解码单元，解码二进制数据并输出二进制数据串;确定单元，用于基于对应于所述二进制数据串的均衡信号的幅度的信息来确定通过最大似然解码获得的二进制数据串中的最短代码是否正确最短代码，用于根据确定单元的确定结果校正二进制数据串中的最短代码的代码校正单元，以及用于解调通过代码校正单元获得的二进制数据串的数据解调单元，以获得从记录介质再现数据。

7. 发明授权

US07634714B2 Decoding system for eight-to-fourteen modulation or eight-to-sixteen modulation 失效
标题翻译：用于8到14调制或8到16调制的解码系统
公开(公告)号：US07634714B2
公开(公告)日：2009-12-15
申请号：US11390205
申请日：2006-03-28
申请人： Wen-Chang Lin
发明人： Wen-Chang Lin
IPC分类号： H03M13/00
CPC分类号： H04L27/0014 , G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10083 , G11B20/10101 , G11B20/10111 , G11B20/10296 , G11B2020/1461 , G11B2020/1465 , G11B2020/1859 , H04L25/03203 , H04L2027/0053 , H04L2027/0065 , H04L2027/0067
摘要： A decoding system for eight-to-fourteen modulation or eight-to-sixteen modulation (EFM/ESM), which has an analog to digital converter (ADC), an adaptive equalizer and a Viterbi decoder. The ADC receives an analog signal with an EFM or ESM feature, and converts the analog signal into a digital signal with the EFM or ESM feature. The adaptive equalizer converts the EFM or ESM digital signal into a first signal with a minimum phase feature. The Viterbi decoder receives the first signal and generates a decoding signal in accordance with a Viterbi algorithm and a channel model, and the Viterbi decoder discards nonexistent paths in accordance with the EFM or ESM feature when computing branch metric of a branch or a node.
摘要翻译：一种用于八到十四调制或八到十六调制（EFM / ESM）的解码系统，其具有模数转换器（ADC），自适应均衡器和维特比解码器。 ADC接收具有EFM或ESM功能的模拟信号，并将模拟信号转换为具有EFM或ESM功能的数字信号。自适应均衡器将EFM或ESM数字信号转换为具有最小相位特征的第一信号。维特比解码器接收第一信号并根据维特比算法和信道模型产生解码信号，并且当计算分支或节点的分支度量时，维特比解码器根据EFM或ESM特征丢弃不存在的路径。

8. 发明授权

US07590926B2 Decoding apparatus, decoding method, program-recording medium, program and recording/reproduction apparatus 失效
标题翻译：解码装置，解码方法，程序记录介质，程序和记录/再现装置
公开(公告)号：US07590926B2
公开(公告)日：2009-09-15
申请号：US11153420
申请日：2005-06-16
申请人： Masaki Endo
发明人： Masaki Endo
IPC分类号： H03M13/03
CPC分类号： G11B20/10009 , G11B20/10101 , G11B20/10111 , G11B20/10296 , G11B2220/2537 , H03M13/4107 , H03M13/4161
摘要： Disclosed is a decoding apparatus for decoding an encoded signal on the basis of a plurality of state-transition trellises having differing state counts. The decoding apparatus includes a decoding section for decoding the encoded signal on the basis of a first state-transition trellis, and a mode selection section for selecting either a first operating mode based on the first state-transition trellis or a second operating mode based on a second state-transition trellis. The second state-transition trellis has a state count smaller than that of the first state-transition trellis. If the mode selection section selects the second operating mode, the decoding section decodes the encoded signal by carrying out a state transition switch from a first state transition to a second state transition.
摘要翻译：公开了一种解码装置，用于根据具有不同状态计数的多个状态转换网格对编码信号进行解码。解码装置包括用于基于第一状态转换网格对编码信号进行解码的解码部分和用于基于第一状态转换网格或第二操作模式选择第一操作模式的模式选择部分，基于第二个国家过渡网格。第二状态转移网格的状态计数小于第一状态转换网格。如果模式选择部分选择第二操作模式，则解码部分通过执行从第一状态转换到第二状态转换的状态转换开关来解码编码信号。

9. 发明授权

US07558177B2 Optical disc playback apparatus 失效
标题翻译：光盘播放装置
公开(公告)号：US07558177B2
公开(公告)日：2009-07-07
申请号：US11344184
申请日：2006-02-01
申请人： Youichi Ogura , Shinichi Konishi
发明人： Youichi Ogura , Shinichi Konishi
IPC分类号： G11B7/00
CPC分类号： G11B20/10055 , G11B20/10037 , G11B20/10046 , G11B20/10083 , G11B20/10101 , G11B20/10111 , G11B20/10166 , G11B20/10203 , G11B20/10212 , G11B20/10222 , G11B20/1876 , G11B2220/2537
摘要： After a playback RF signal 3 detected from an optical disc medium 1 is waveform-shaped, it is converted into a digital RF signal 6 with a sampling clock 8 having a cycle twice as long as a channel clock. Thereafter, a first offset correction circuit 9 corrects an offset fluctuation in a high frequency band, and a digital adaptive equalizer 23 performs adaptive equalization, and then a second offset correction circuit 27 corrects an offset component that remains after the offset correction by the first offset correction circuit 9, thereby demodulating a digital binary signal 37. Therefore, even when high-speed playback is carried out and an asymmetry depending on the recording quality is large, a reduction in power consumption can be realized while maintaining high-performance playback. Consequently, it is possible to provide an optical disc playback apparatus which can realize sufficient playback performance at low power consumption.
摘要翻译：在从光盘介质1检测到的重放RF信号3是波形的之后，它被转换成具有采样时钟8的数字RF信号6，采样时钟8的周期是通道时钟的两倍。此后，第一偏移校正电路9校正高频带中的偏移波动，并且数字自适应均衡器23执行自适应均衡，然后第二偏移校正电路27将偏移校正之后剩余的偏移分量校正为第一偏移校正电路9，从而解调数字二进制信号37.因此，即使执行高速重放，并且取决于记录质量的不对称性大，可以在保持高性能回放的同时实现功耗的降低。因此，可以提供能够以低功耗实现充分的播放性能的光盘播放装置。

10. 发明授权

US07477709B2 Device and method for data reproduction 失效
标题翻译：用于数据再现的装置和方法
公开(公告)号：US07477709B2
公开(公告)日：2009-01-13
申请号：US10910422
申请日：2004-08-04
申请人： Hyun-soo Park , Jae-seong Shim , Jae-wook Lee , Jung-hyun Lee , Eun-jin Ryu , Eing-seob Cho
发明人： Hyun-soo Park , Jae-seong Shim , Jae-wook Lee , Jung-hyun Lee , Eun-jin Ryu , Eing-seob Cho
IPC分类号： H03D1/00
CPC分类号： G11B20/10101 , G11B20/10009 , G11B20/10296 , G11B20/10481
摘要： A device and method of data reproduction that can achieve a reference level optimizing the characteristic of a channel and can be applied to the reproduction of data on an optical disk are provided. According to the device and method, even when an input signal is in an abnormal state, an input level value can be initialized so that a Viterbi decoder can normally operate.
摘要翻译：提供了一种数据再现的装置和方法，其可以实现优化信道特性的参考电平并且可以应用于光盘上的数据的再现。根据该装置和方法，即使当输入信号处于异常状态时，也可以初始化输入电平值，使维特比解码器正常工作。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式