公开(公告)号：US08358683B2

公开(公告)日：2013-01-22

申请号：US12058897

申请日：2008-03-31

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L25/0307 ,  H04L2025/0349 ,  H04L2025/03617

Abstract: A channel equalizer arranged to receive a data signal encoded by a plurality of amplitude levels, the circuitry including a filter having a plurality of taps, each tap generating an output signal based on a coefficient, an input for receiving an error signal for adapting the coefficients, and an output for outputting a filtered signal; and blind error generation circuitry arranged to generate the error signal, the blind error generation circuitry including: error estimating circuitry arranged to estimate the error of the filtered signal based on maximum likelihood; and adding circuitry coupled to the error estimating circuitry and to the output of the filter and arranged to add at least part of the filtered signal to the error estimated by the error estimating circuitry to generate the error signal.

Abstract translation: 一种信道均衡器，被布置为接收由多个幅度电平编码的数据信号，所述电路包括具有多个抽头的滤波器，每个抽头基于系数产生输出信号，用于接收用于使系数适应的误差信号的输入 以及用于输出滤波信号的输出; 以及盲目错误产生电路，其被布置为产生所述误差信号，所述盲目错误产生电路包括：错误估计电路，被布置为基于最大似然估计滤波信号的误差; 以及添加耦合到所述误差估计电路和所述滤波器的输出的电路，并且被布置为将所述经滤波的信号的至少一部分添加到由所述误差估计电路估计的误差以产生所述误差信号。

公开(公告)号：US06452878B1

公开(公告)日：2002-09-17

申请号：US09782711

申请日：2001-02-13

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: G11B700

CPC classification number: G11B7/0901

Abstract: A method for controlling the position of an optical beam incident on a track of a rotationally mobile carrier of information, such as a disc, includes picking up a beam reflected by the disc using an optical pick-up and determining a positioning error of the beam with respect to the track. The pick-up may include several photodetectors each providing an elementary signal, and the positioning error may be determined from the elementary signals. More precisely, from the elementary signals two sampled secondary signals whose mutual time gap is representative of the positioning error of the beam with respect to the track may be formulated. Furthermore, successive current values of the mutual time gap may be determined at the sampling frequency by searching at the sampling frequency for a successive current maximum of the cross-correlation function between the two sampled secondary signals. The present invention may be particularly applicable to multifunction digital disc (e.g., DVD) readers, for example.

Abstract translation: 用于控制入射在诸如光盘的信息的旋转移动载体的轨道上的光束的位置的方法包括使用光学拾取器拾取由盘拾取的光束，并确定光束的定位误差 相对于赛道。 拾取器可以包括各自提供基本信号的几个光电检测器，并且可以从基本信号确定定位误差。 更准确地说，从基本信号可以制定相互间隔代表波束相对于轨道的定位误差的两个采样次级信号。 此外，可以以采样频率通过在采样频率处搜索两个采样次级信号之间的互相关函数的连续电流最大值来确定相互时间间隙的连续电流值。 本发明可以特别适用于例如多功能数字盘（例如，DVD）读取器。

公开(公告)号：US08374232B2

公开(公告)日：2013-02-12

申请号：US12058913

申请日：2008-03-31

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H04L25/03038 ,  H04L2025/03477 ,  H04L2025/03617 ,  H04L2025/03687

Abstract: A channel equalizer having a filter arranged to filter an input signal, the filter including a plurality of taps, each tap generating an output signal based on a coefficient, an input for receiving the coefficients and an output for outputting a filtered signal; and coefficient generating circuitry including a graduation unit arranged to receive the input signal and an error signal indicating an error in the filtered signal, to accumulate gradient values relating to each of the coefficients based on a plurality of error values of the error signal, each of the gradient values indicating a required change in one of the coefficients, and to sequentially output the gradient values; and coefficient update unit arranged to sequentially update each of the filter coefficients in turn, based on the gradient values.

Abstract translation: 一种信道均衡器，具有滤波器，用于对输入信号进行滤波，滤波器包括多个抽头，每个抽头基于系数产生输出信号，用于接收系数的输入端和用于输出滤波信号的输出; 以及系数产生电路，包括被配置为接收所述输入信号的分度单元和指示所述滤波信号中的误差的误差信号，以基于所述误差信号的多个误差值来累加与所述系数中的每一个有关的梯度值， 所述梯度值指示所述一个系数中的所需变化，并顺序地输出所述梯度值; 以及系数更新单元，被配置为基于梯度值依次依次更新每个滤波器系数。

公开(公告)号：US20090245342A1

公开(公告)日：2009-10-01

申请号：US12058913

申请日：2008-03-31

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: H04L27/01

CPC classification number: H04L25/03038 ,  H04L2025/03477 ,  H04L2025/03617 ,  H04L2025/03687

Abstract: A channel equalizer having a filter arranged to filter an input signal, the filter including a plurality of taps, each tap generating an output signal based on a coefficient, an input for receiving the coefficients and an output for outputting a filtered signal; and coefficient generating circuitry including a graduation unit arranged to receive the input signal and an error signal indicating an error in the filtered signal, to accumulate gradient values relating to each of the coefficients based on a plurality of error values of the error signal, each of the gradient values indicating a required change in one of the coefficients, and to sequentially output the gradient values; and coefficient update unit arranged to sequentially update each of the filter coefficients in turn, based on the gradient values.

Abstract translation: 一种信道均衡器，具有滤波器，用于对输入信号进行滤波，滤波器包括多个抽头，每个抽头基于系数产生输出信号，用于接收系数的输入端和用于输出滤波信号的输出; 以及系数产生电路，包括被配置为接收所述输入信号的分度单元和指示所述滤波信号中的误差的误差信号，以基于所述误差信号的多个误差值来累加与所述系数中的每一个有关的梯度值， 所述梯度值指示所述一个系数中的所需变化，并顺序地输出所述梯度值; 以及系数更新单元，被配置为基于梯度值依次依次更新每个滤波器系数。

公开(公告)号：US20090245341A1

公开(公告)日：2009-10-01

申请号：US12058897

申请日：2008-03-31

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: H04L27/01

CPC classification number: H04L25/0307 ,  H04L2025/0349 ,  H04L2025/03617

Abstract: A channel equalizer arranged to receive a data signal encoded by a plurality of amplitude levels, the circuitry including a filter having a plurality of taps, each tap generating an output signal based on a coefficient, an input for receiving an error signal for adapting the coefficients, and an output for outputting a filtered signal; and blind error generation circuitry arranged to generate the error signal, the blind error generation circuitry including: error estimating circuitry arranged to estimate the error of the filtered signal based on maximum likelihood; and adding circuitry coupled to the error estimating circuitry and to the output of the filter and arranged to add at least part of the filtered signal to the error estimated by the error estimating circuitry to generate the error signal.

Abstract translation: 一种信道均衡器，被布置为接收由多个幅度电平编码的数据信号，所述电路包括具有多个抽头的滤波器，每个抽头基于系数产生输出信号，用于接收用于使系数适应的误差信号的输入 以及用于输出滤波信号的输出; 以及盲目错误产生电路，其被布置为产生所述误差信号，所述盲目错误产生电路包括：错误估计电路，被布置为基于最大似然估计滤波信号的误差; 以及添加耦合到所述误差估计电路和所述滤波器的输出的电路，并且被布置为将所述经滤波的信号的至少一部分添加到由所述误差估计电路估计的误差以产生所述误差信号。

公开(公告)号：US07239592B2

公开(公告)日：2007-07-03

申请号：US10729192

申请日：2003-12-05

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: G11B20/10

CPC classification number: G11B27/24 ,  G11B7/007 ,  G11B7/00745 ,  G11B20/10009 ,  G11B20/14 ,  G11B20/1403 ,  G11B20/18 ,  G11B27/3027 ,  G11B2220/218 ,  G11B2220/2545 ,  G11B2220/2562

Abstract: For indicating on a data medium (9) a sector referenced by a binary word (16) formed of a number M of first bytes each comprising a number L of bits, the method includes steps of etching onto the data medium locally at this sector a succession of M second bytes each corresponding to a first byte, each second byte being equal to a vector of N components, each with a value of +1 or −1, such that N=2L−1 and such that the scalar product of said vector with any other vector to which another second byte is equal, is at most equal to +1. The data medium (9) is, for example, an optical disk.

Abstract translation: 为了在数据介质（9）上指示由二进制字（16）引用的扇区，该二进制字由包括数字L位的M个第一字节组成，该方法包括以下步骤：在该扇区处本地蚀刻到数据介质上 每个对应于第一字节的M个第二字节的连续，每个第二字节等于N个分量的矢量，每个分量具有值+1或-1，使得N = 2L -1 并且使得所述向量与另一第二字节相等的任何其他向量的标量乘积最大等于+1。 数据媒体（9）例如是光盘。

公开(公告)号：US06961295B2

公开(公告)日：2005-11-01

申请号：US10726421

申请日：2003-12-03

Applicant: Philippe Graffouliere

Inventor： Philippe Graffouliere

IPC: G11B7/007 ,  G11B20/14 ,  G11B20/18 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B5/09

CPC classification number: G11B27/24 ,  G11B7/0053 ,  G11B7/00745 ,  G11B20/14 ,  G11B20/18 ,  G11B27/3027 ,  G11B2220/218 ,  G11B2220/2545 ,  G11B2220/2562

Abstract: During manufacturing of optical disks, mastering equipment inserts marks (“high frequency wobble marks” or “HFWMs”) into the wobble of the groove on optical disks to store data. The presence of a HFWM at a zero crossing of the wobble indicates an active bit and the absence of the HFWM indicates an inactive bit. The zero crossing is, for example, a negative zero crossing. A matched filter is used to detect the shape of the HFWMs. If a HFWM is detected during a wobble cycle, an active bit is saved in a register or a memory. If a HFWM is not detected during a wobble cycle, an inactive bit is saved in a register or a memory. The active and inactive bits may be coded bits that must be decoded to data bits. The data bits include information such as a synchronization mark, a sector identification data, and an error detection code.

Abstract translation: 在光盘制造过程中，母盘设备将标记（“高频摇摆标记”或“HFWM”）插入到光盘上凹槽的摆动中以存储数据。 HFWM在摆幅过零点处的存在表示有效位，并且HFWM的不存在表示无效位。 过零点例如是负零交叉。 匹配滤波器用于检测HFWM的形状。 如果在摆动周期期间检测到HFWM，则活动位将保存在寄存器或存储器中。 如果在摆动周期期间未检测到HFWM，则无效位将保存在寄存器或存储器中。 有源和无效位可以是必须被解码为数据位的编码位。 数据位包括诸如同步标记，扇区识别数据和错误检测码之类的信息。