Method and apparatus for detecting sync mark
    1.
    发明授权
    Method and apparatus for detecting sync mark 有权
    用于检测同步标记的方法和装置

    公开(公告)号:US08576969B1

    公开(公告)日:2013-11-05

    申请号:US13151964

    申请日:2011-06-02

    申请人: Jin Xie Mats Oberg

    发明人: Jin Xie Mats Oberg

    IPC分类号: H04L7/00

    摘要: Aspects of the disclosure provide a method for detecting marks. The method includes receiving a data signal from a channel. Further, the method includes matching the data signal to a template that corresponds to a predetermined pattern transmitted over the channel to detect marks, prior to decoding the data signal into a decoded bit stream.

    摘要翻译: 本公开的方面提供了用于检测标记的方法。 该方法包括从信道接收数据信号。 此外,在将数据信号解码为解码的比特流之前,该方法包括将数据信号与对应于通过信道发送的预定模式的模板进行匹配以检测标记。

    Asymmetry compensation system
    2.
    发明授权
    Asymmetry compensation system 有权
    不对称补偿系统

    公开(公告)号:US08477581B1

    公开(公告)日:2013-07-02

    申请号:US12104879

    申请日:2008-04-17

    IPC分类号: G11B20/10

    摘要: A system with a nonlinear element processes a replay signal with a scaling factor into a signal compensated for asymmetry. The replay signal may include data from an optical disk. The scaling factor may be estimated based on the compensated signal and a scaling factor gain. The replay signal and the compensated signal may be converted into digital signals and processed digitally. In one embodiment, the compensated signal may be calculated as approximately the scaling factor multiplied by a square of an amplitude of the replay signal added to the amplitude of the replay signal. In another embodiment, the compensated signal may be calculated as approximately the scaling factor multiplied by an absolute value of an amplitude of the replay signal added to the amplitude of the replay signal. A related method is also disclosed. Other embodiments are provided, and each of the embodiments described herein can be used alone or in combination with one another.

    摘要翻译: 具有非线性元件的系统将缩放因子的重放信号处理成补偿不对称的信号。 重放信号可以包括来自光盘的数据。 可以基于补偿信号和缩放因子增益来估计缩放因子。 重播信号和补偿信号可以被转换成数字信号并以数字方式处理。 在一个实施例中,可以将补偿信号近似计算为乘以重放信号的振幅的重放信号的振幅的平方乘以比例因子。 在另一个实施例中,可以将补偿信号近似地计算为与重放信号的振幅相加的重放信号的振幅的绝对值乘以比例因子。 还公开了相关方法。 提供了其它实施例,并且本文所述的每个实施例可以单独使用或彼此组合使用。

    METHOD AND APPARATUS FOR OFFSET AND GAIN CORRECTION
    3.
    发明申请
    METHOD AND APPARATUS FOR OFFSET AND GAIN CORRECTION 有权
    用于偏移和增益校正的方法和装置

    公开(公告)号:US20110273974A1

    公开(公告)日:2011-11-10

    申请号:US13101439

    申请日:2011-05-05

    IPC分类号: G11B20/10

    摘要: Aspects of the disclosure provide a signal processing circuit that has fast response time to sudden profile changes in an electrical signal. The signal processing circuit includes a processing path configured to process an electrical signal that is generated in response to reading data on a storage medium, and a feed-forward correction module. The feed-forward correction module is configured to detect a profile variation based the electrical signal in a time window, and correct the electrical signal in the time window based on the detected profile variation.

    摘要翻译: 本公开的方面提供了一种信号处理电路,其对电信号中的突然轮廓变化具有快速响应时间。 信号处理电路包括处理路径,其被配置为处理响应于在存储介质上读取数据而产生的电信号和前馈校正模块。 前馈校正模块被配置为基于时间窗中的电信号检测轮廓变化,并且基于检测到的轮廓变化来校正时间窗中的电信号。

    Method and apparatus for offset and gain correction
    4.
    发明授权
    Method and apparatus for offset and gain correction 有权
    用于偏移和增益校正的方法和装置

    公开(公告)号:US08687471B2

    公开(公告)日:2014-04-01

    申请号:US13596487

    申请日:2012-08-28

    申请人: Jin Xie Mats Oberg

    发明人: Jin Xie Mats Oberg

    IPC分类号: G11B15/52

    摘要: Aspects of the disclosure provide a signal processing circuit that includes a signal processing circuit includes a processing path configured to process an electrical signal to produce input data samples, and a feed-forward correction module configured to delay the input data samples to produce delayed data samples, to apply the delayed data samples to a timing loop during periods when a profile variation of the data samples is not detected, and to apply the input data sample to the timing loop during periods when a profile variation of the data samples is detected.

    摘要翻译: 本公开的方面提供一种信号处理电路,其包括信号处理电路,该信号处理电路包括处理路径,该处理路径被配置为处理电信号以产生输入数据样本;以及前馈校正模块,其被配置为延迟输入数据采样以产生延迟的数据采样 在未检测到数据样本的轮廓变化的时段期间将延迟的数据样本应用于定时循环,并且在检测到数据样本的轮廓变化的时段期间将输入数据样本应用于定时循环。

    Method and apparatus to correct distortion
    5.
    发明授权
    Method and apparatus to correct distortion 有权
    校正失真的方法和装置

    公开(公告)号:US08416659B1

    公开(公告)日:2013-04-09

    申请号:US12964241

    申请日:2010-12-09

    申请人: Jin Xie Mats Oberg

    发明人: Jin Xie Mats Oberg

    IPC分类号: G11B20/10

    摘要: Aspects of the disclosure provide a signal processing circuit to reduce signal distortions due to optical aberrations. The signal processing circuit includes a circuit configured to receive an electrical signal corresponding to a light beam reflected by a storage medium and filter the electrical signal to reduce distortions due to, for example, birefringence aberration in the light beam, and an equalizer configured to equalize the filtered electrical signal. In an example, the circuit is a median filter.

    摘要翻译: 本公开的方面提供了一种信号处理电路,以减少由于光学像差引起的信号失真。 信号处理电路包括电路,其被配置为接收与由存储介质反射的光束相对应的电信号并对电信号进行滤波以减少由于例如光束中的双折射像差引起的失真,以及均衡器, 滤波后的电信号。 在一个例子中,电路是中值滤波器。

    Method and device for detecting a sync mark
    6.
    发明授权
    Method and device for detecting a sync mark 有权
    用于检测同步标记的方法和装置

    公开(公告)号:US08358566B1

    公开(公告)日:2013-01-22

    申请号:US12359855

    申请日:2009-01-26

    申请人: Mats Oberg Jin Xie

    发明人: Mats Oberg Jin Xie

    IPC分类号: G11B5/09

    CPC分类号: G11B7/00736 G11B20/10009

    摘要: A method and device for determining frequency error to extend the pull-in range of a timing recovery circuit for a storage device such as an optical disc drive. A code associated with a storage format of the storage device is detected, and the distance between occurrences of the code is determined. The calculated distance is compared with the expected distance to determine the difference. Based on the difference, the frequency error is determined.

    摘要翻译: 一种用于确定频率误差以延长诸如光盘驱动器之类的存储装置的定时恢复电路的拉入范围的方法和装置。 检测与存储装置的存储格式相关联的代码,并且确定代码的出现之间的距离。 将计算出的距离与预期距离进行比较以确定差异。 根据差异,确定频率误差。

    Methods and systems for reducing jitter
    7.
    发明授权
    Methods and systems for reducing jitter 有权
    减少抖动的方法和系统

    公开(公告)号:US08836387B1

    公开(公告)日:2014-09-16

    申请号:US12984356

    申请日:2011-01-04

    IPC分类号: H03L7/06

    CPC分类号: H03L7/093

    摘要: Methods and systems for compensating reducing jitter produced by a phase-locked loop are disclosed. For example, in a particular embodiment, a phase-locked loop device for reducing jitter may include a voltage-control oscillator (VCO) signal configured to produce a VCO signal, phase-detection circuitry configured to compare an input signal and the VCO signal to produce a phase error signal, and slew-rate limiting circuitry configured to receive the phase error signal and apply a slew-rate limit process on the phase error signal to produce a modified error signal.

    摘要翻译: 公开了用于补偿由锁相环产生的抖动的方法和系统。 例如,在特定实施例中,用于减少抖动的锁相环装置可以包括被配置为产生VCO信号的电压控制振荡器(VCO)信号,相位检测电路被配置为将输入信号和VCO信号进行比较 产生相位误差信号和摆率限制电路,其配置为接收相位误差信号,并对相位误差信号施加转换速率限制处理以产生修正的误差信号。

    ERROR CORRECTION CODE TECHNIQUES FOR MATRICES WITH INTERLEAVED CODEWORDS
    8.
    发明申请
    ERROR CORRECTION CODE TECHNIQUES FOR MATRICES WITH INTERLEAVED CODEWORDS 失效
    错误校正代码技术用于具有互换代码的矩阵

    公开(公告)号:US20130047055A1

    公开(公告)日:2013-02-21

    申请号:US13556466

    申请日:2012-07-24

    申请人: Mats Oberg Jin Xie

    发明人: Mats Oberg Jin Xie

    IPC分类号: H03M13/05 G06F11/10

    摘要: A decoding system includes a decoder, a first module and a second module. The decoder is configured to receive data read from an optical storage medium and perform a first decoding iteration and a second decoding iteration to decode the data. The first decoding iteration includes generating a resultant matrix. The first module is configured to, based on first decoding statuses of multiple bytes in the resultant matrix, determine second decoding statuses of bytes proximate to failed bytes of a feedback matrix. The feedback matrix is generated based on the resultant matrix. The first module is configured to mark selected ones of the failed bytes as erasures based on the second decoding statuses. The second module is configured to correct one or more of the bytes marked as erasures during the second decoding iteration.

    摘要翻译: 解码系统包括解码器,第一模块和第二模块。 解码器被配置为接收从光学存储介质读取的数据,并执行第一解码迭代和第二解码迭代以解码数据。 第一解码迭代包括生成合成矩阵。 第一模块被配置为基于所得到的矩阵中的多个字节的第一解码状态来确定接近反馈矩阵的失败字节的字节的第二解码状态。 基于得到的矩阵生成反馈矩阵。 第一模块被配置为基于第二解码状态将所选出的故障字节标记为擦除。 第二模块被配置为校正在第二解码迭代期间标记为擦除的一个或多个字节。

    Supplementary timing recovery
    9.
    发明授权
    Supplementary timing recovery 有权
    补充时间恢复

    公开(公告)号:US08031573B1

    公开(公告)日:2011-10-04

    申请号:US12767393

    申请日:2010-04-26

    申请人: Jin Xie Mats Oberg

    发明人: Jin Xie Mats Oberg

    IPC分类号: G11B7/0045

    摘要: Aspects of the disclosure provide a signal processing circuit to reconstruct data from an analog signal. The signal processing circuit includes an analog to digital converter (ADC), an equalizer, a first timing compensation module, a phase-shift module and a second timing compensation module. The ADC receives an analog input signal, samples the analog input signal based on a sampling clock signal, and converts the sampled analog input signal into a digital output signal. The equalizer equalizes the digital output signal. The first timing compensation module detects a first timing error based on the digital output signal, and adjusts the sampling clock signal based on the first timing error. The phase-shift module phase-shifts the equalized digital output signal based on a phase-shift signal. The second timing compensation module detects a second timing error based on the equalized digital output signal, and adjusts the phase-shift signal based on the second timing error.

    摘要翻译: 本公开的方面提供了一种用于从模拟信号重构数据的信号处理电路。 信号处理电路包括模数转换器(ADC),均衡器,第一定时补偿模块,相移模块和第二定时补偿模块。 ADC接收模拟输入信号,根据采样时钟信号采样模拟输入信号,并将采样的模拟输入信号转换为数字输出信号。 均衡器使数字输出信号均衡。 第一定时补偿模块基于数字输出信号检测第一定时误差,并且基于第一定时误差来调整采样时钟信号。 相移模块基于相移信号对均衡的数字输出信号进行相移。 第二定时补偿模块基于均衡的数字输出信号检测第二定时误差,并且基于第二定时误差来调整相移信号。