公开(公告)号：US08135219B2

公开(公告)日：2012-03-13

申请号：US11682920

申请日：2007-03-07

Applicant: Chia-Yen Chang ,  Hsin-Ping Cheng

Inventor： Chia-Yen Chang ,  Hsin-Ping Cheng

IPC: G06K9/62 ,  G03H1/00 ,  G03H1/26 ,  G03H5/32

CPC classification number: G11B7/0065 ,  G11B7/00375

Abstract: A method of detecting and compensating fail pixels in a holographic storage system. The method includes steps of: providing a plurality of image frames to show on a data plane for all pixels on the data plane being capable of outputting a light state or a dark state; sequentially recording the image frames into a storage medium; detecting the image frames by using a detecting apparatus for all pixels on the detecting apparatus being capable of outputting sensing signals corresponding to the light state and the dark state; defining a sensing difference value, which is a difference of the sensing signal outputting the light state and the dark state generated by one pixel; comparing the sensing difference value with a threshold value; and defining the corresponding pixel is a fail pixel if the sensing difference value is smaller than the threshold value.

Abstract translation: 一种在全息存储系统中检测和补偿失败像素的方法。 该方法包括以下步骤：提供多个图像帧以在数据平面上显示能够输出光状态或暗状态的数据平面上的所有像素; 顺序地将图像帧记录到存储介质中; 通过使用检测装置的检测装置来检测图像帧，所述检测装置能够输出对应于光状态和暗状态的感测信号; 定义感测差值，其是输出光状态的感测信号与由一个像素产生的暗状态的差; 将感测差值与阈值进行比较; 并且如果感测差值小于阈值，则定义相应像素是失效像素。

公开(公告)号：US20080062488A1

公开(公告)日：2008-03-13

申请号：US11682920

申请日：2007-03-07

Applicant: Chia-Yen Chang ,  Hsin-Ping Cheng

Inventor： Chia-Yen Chang ,  Hsin-Ping Cheng

IPC: G03H1/26

CPC classification number: G11B7/0065 ,  G11B7/00375

Abstract: A method of detecting and compensating fail pixels in a holographic storage system. The method includes steps of: providing a plurality of image frames to show on a data plane for all pixels on the data plane being capable of outputting a light state or a dark state; sequentially recording the image frames into a storage medium; detecting the image frames by using a detecting apparatus for all pixels on the detecting apparatus being capable of outputting sensing signals corresponding to the light state and the dark state; defining a sensing difference value, which is a difference of the sensing signal outputting the light state and the dark state generated by one pixel; comparing the sensing difference value with a threshold value; and defining the corresponding pixel is a fail pixel if the sensing difference value is smaller than the threshold value.

Abstract translation: 一种在全息存储系统中检测和补偿失败像素的方法。 该方法包括以下步骤：提供多个图像帧以在数据平面上显示能够输出光状态或暗状态的数据平面上的所有像素; 顺序地将图像帧记录到存储介质中; 通过使用检测装置的检测装置来检测图像帧，所述检测装置能够输出对应于光状态和暗状态的感测信号; 定义感测差值，其是输出光状态的感测信号与由一个像素产生的暗状态的差; 将感测差值与阈值进行比较; 并且如果感测差值小于阈值，则定义相应像素是失效像素。

公开(公告)号：US07567191B2

公开(公告)日：2009-07-28

申请号：US12132756

申请日：2008-06-04

Applicant: Chia-Yen Chang ,  Hsin-Ping Cheng

Inventor： Chia-Yen Chang ,  Hsin-Ping Cheng

IPC: H03M7/00

CPC classification number: H03M5/145 ,  G11B20/1426 ,  G11B2020/1457 ,  G11B2020/1859 ,  G11B2220/2504

Abstract: A method of designing a look-up table of a finite-state encoder, applied to a finite-state encoder, comprises steps of: determining a bit length of a legal output codeword derived from the finite-state encoder and a restrict condition; collecting a plurality of legal output codeword satisfied the restrict condition; determining a bit length of an input codeword derived to the finite-state encoder according to the amount of the plurality of the legal output codeword; determining the amount of states in the finite-state encoder according to the bit length of the input codeword and the bit length of the legal output codeword; dividing the plurality of legal output codeword to a plurality of subset according to the amount of the states in the finite-state encoder and a specific mathematic equation; determining the amount of the legal output codewords in the plurality of subset; and, completing the look-up table through determining a relationship among a present state, a previous state, and a corresponding subset, wherein the amount of the subsets used in the look-up table is greater than the amount of the states in the finite-state encoder and smaller than two times of the amount of the states in the finite-state encoder.

Abstract translation: 一种设计应用于有限状态编码器的有限状态编码器的查找表的方法，包括以下步骤：确定从有限状态编码器导出的合法输出码字的位长度和限制条件; 收集满足限制条件的多个合法输出码字; 根据多个合法输出码字的量确定导出到有限状态编码器的输入码字的比特长度; 根据输入码字的比特长度和合法输出码字的比特长度确定有限状态编码器中的状态量; 根据有限状态编码器中的状态量和特定数学方程将多个合法输出码字划分为多个子集; 确定所述多个子集中的合法输出码字的数量; 并且通过确定当前状态，先前状态和相应子集之间的关系来完成查找表，其中在查找表中使用的子集的量大于有限状态中的状态量 状态编码器，并且小于有限状态编码器状态量的两倍。

公开(公告)号：US20080062490A1

公开(公告)日：2008-03-13

申请号：US11619615

申请日：2007-01-04

Applicant: Hsin-Ping Cheng ,  Chia-Yen Chang

Inventor： Hsin-Ping Cheng ,  Chia-Yen Chang

IPC: G03H1/22

CPC classification number: G11B7/0065 ,  G11B20/10009 ,  G11B20/10027 ,  G11B2220/2504

Abstract: A holographic storage system. A low over-sampling technology and an adaptable gain-controlling unit are used in the holographic storage system for unequally amplifying signals generated by a detecting apparatus. Then the amplified signals generated by the detecting apparatus are summed in order to generate summing signals, which are used to detect original image frames for raising the resolution of the images and reducing the error rate of the data.

Abstract translation: 全息存储系统。 在全息存储系统中使用低过采样技术和适应增益控制单元，用于不均衡地放大由检测装置产生的信号。 然后将由检测装置产生的放大信号相加以产生求和信号，其用于检测原始图像帧以提高图像的分辨率并降低数据的错误率。

公开(公告)号：US20070002702A1

公开(公告)日：2007-01-04

申请号：US11425662

申请日：2006-06-21

Applicant: Hsin-Ping Cheng ,  Jui-Cheng Lee ,  Wen-Chun Hsu

Inventor： Hsin-Ping Cheng ,  Jui-Cheng Lee ,  Wen-Chun Hsu

IPC: G11B7/00

CPC classification number: G11B7/13925 ,  G11B7/0945 ,  G11B2007/0006

Abstract: The present invention discloses an aberration correcting method for use between an optical disc drive and an optical disc. The optical disc drive includes an optical pickup head having an aberration-correcting unit and a control chipset. The method includes steps of: operating the optical pickup head in a focusing-locked and tracking-unlocked state; generating a read-back signal by projecting a laser beam to the optical disc; converting the read-back signal into a radio frequency signal and a tracking error signal by the control chipset; detecting corresponding amplitudes of the radio frequency signal or the tracking error signal at different compensation values by the control chipset; determining a target compensation value by selecting the compensation value corresponding to the maximum amplitude of the tracking error signal or the radio frequency signal; and controlling the aberration-correcting unit according to the target compensation value.

Abstract translation: 本发明公开了一种在光盘驱动器和光盘之间使用的像差校正方法。 光盘驱动器包括具有像差校正单元和控制芯片组的光学拾取头。 该方法包括以下步骤：以聚焦锁定和跟踪解锁状态操作光学拾取头; 通过将激光束投射到光盘来产生回读信号; 通过控制芯片组将回读信号转换成射频信号和跟踪误差信号; 通过控制芯片组以不同的补偿值检测射频信号或跟踪误差信号的对应幅度; 通过选择对应于跟踪误差信号或射频信号的最大幅度的补偿值来确定目标补偿值; 并根据目标补偿值控制像差校正单元。

公开(公告)号：US20060028963A1

公开(公告)日：2006-02-09

申请号：US11196345

申请日：2005-08-04

Applicant: Hsin-Ping Cheng

Inventor： Hsin-Ping Cheng

IPC: G11B7/00

CPC classification number: G11B20/10009

Abstract: A method for generating a feedback signal in optical disc drives is disclosed. Firstly RF signal is generated by a pickup head and coupled to a converter to generate a digital signal. Then a detector generates a plurality of pseudo-jitter according to the digital signal. Thereafter a calculator receives the said pseudo-jitter and calculates for outputting a feedback signal to the pickup head.

Abstract translation: 公开了一种在光盘驱动器中产生反馈信号的方法。 首先，RF信号由拾取头产生并耦合到转换器以产生数字信号。 然后，检测器根据数字信号产生多个伪抖动。 此后，计算器接收所述伪抖动并且计算用于将反馈信号输出到拾取头。

公开(公告)号：US20050270921A1

公开(公告)日：2005-12-08

申请号：US10709853

申请日：2004-06-02

Applicant: Chia-Yen Chang ,  Hsin-Ping Cheng

Inventor： Chia-Yen Chang ,  Hsin-Ping Cheng

IPC: G11B7/00 ,  G11B7/09

CPC classification number: G11B7/094 ,  G11B7/0901

Abstract: A method of tracking error correction, primarily for utilization in optical disc drives using single beam optical pick-up heads. Delinearization in the tracking servo of a single beam optical pick-up head, contributed to by inherent design properties, is minimized by extracting a value proportional to a tracking error signal offset component from a tracking servo demand signal, applying a scaling factor to match the scaling applied to the tracking servo demand signal with scaling applied to the amplified tracking error signal, and subtracting the product of this function from the source signal i.e. the tracking error signal. The modified source signal, following this operation, has a reduced order of tracking error offset.

Abstract translation: 跟踪误差校正的方法，主要用于使用单光束拾取头的光盘驱动器。 通过由跟踪伺服需求信号提取与跟踪误差信号偏移分量成比例的值，将由固有设计特性贡献的单光束拾取头的跟踪伺服中的划线最小化，应用缩放因子以匹配 缩放应用于跟踪伺服需求信号，其中缩放应用于放大的跟踪误差信号，以及从源信号即跟踪误差信号中减去该函数的乘积。 在该操作之后，修改的源信号具有降低的跟踪误差偏移的次序。

公开(公告)号：US20090027244A1

公开(公告)日：2009-01-29

申请号：US12132756

申请日：2008-06-04

Applicant: Chia-Yen Chang ,  Hsin-Ping Cheng

Inventor： Chia-Yen Chang ,  Hsin-Ping Cheng

IPC: H03M7/42

CPC classification number: H03M5/145 ,  G11B20/1426 ,  G11B2020/1457 ,  G11B2020/1859 ,  G11B2220/2504

Abstract: A method of designing a look-up table of a finite-state encoder, applied to a finite-state encoder, comprises steps of: determining a bit length of a legal output codeword derived from the finite-state encoder and a restrict condition; collecting a plurality of legal output codeword satisfied the restrict condition; determining a bit length of an input codeword derived to the finite-state encoder according to the amount of the plurality of the legal output codeword; determining the amount of states in the finite-state encoder according to the bit length of the input codeword and the bit length of the legal output codeword; dividing the plurality of legal output codeword to a plurality of subset according to the amount of the states in the finite-state encoder and a specific mathematic equation; determining the amount of the legal output codewords in the plurality of subset; and, completing the look-up table through determining a relationship among a present state, a previous state, and a corresponding subset, wherein the amount of the subsets used in the look-up table is greater than the amount of the states in the finite-state encoder and smaller than two times of the amount of the states in the finite-state encoder.

Abstract translation: 一种设计应用于有限状态编码器的有限状态编码器的查找表的方法，包括以下步骤：确定从有限状态编码器导出的合法输出码字的位长度和限制条件; 收集满足限制条件的多个合法输出码字; 根据多个合法输出码字的量确定导出到有限状态编码器的输入码字的比特长度; 根据输入码字的比特长度和合法输出码字的比特长度确定有限状态编码器中的状态量; 根据有限状态编码器中的状态量和特定数学方程将多个合法输出码字划分为多个子集; 确定所述多个子集中的合法输出码字的数量; 并且通过确定当前状态，先前状态和相应子集之间的关系来完成查找表，其中在查找表中使用的子集的量大于有限状态中的状态量 状态编码器，并且小于有限状态编码器状态量的两倍。

公开(公告)号：US07460446B2

公开(公告)日：2008-12-02

申请号：US11196345

申请日：2005-08-04

Applicant: Hsin-Ping Cheng

Inventor： Hsin-Ping Cheng

IPC: G11B7/00

CPC classification number: G11B20/10009

Abstract: A method for generating a feedback signal in optical disc drives is disclosed. Firstly RF signal is generated by a pickup head and coupled to a converter to generate a digital signal. Then a detector generates a plurality of pseudo-jitter according to the digital signal. Thereafter a calculator receives the said pseudo-jitter and calculates for outputting a feedback signal to the pickup head.

Abstract translation: 公开了一种在光盘驱动器中产生反馈信号的方法。 首先，RF信号由拾取头产生并耦合到转换器以产生数字信号。 然后，检测器根据数字信号产生多个伪抖动。 此后，计算器接收所述伪抖动并且计算用于将反馈信号输出到拾取头。

公开(公告)号：US07145849B2

公开(公告)日：2006-12-05

申请号：US10709853

申请日：2004-06-02

Applicant: Chia-Yen Chang ,  Hsin-Ping Cheng

Inventor： Chia-Yen Chang ,  Hsin-Ping Cheng

IPC: G11B7/00

CPC classification number: G11B7/094 ,  G11B7/0901

Abstract: A method of tracking error correction, primarily for utilization in optical disc drives using single beam optical pick-up heads. Delinearization in the tracking servo of a single beam optical pick-up head, contributed to by inherent design properties, is minimized by extracting a value proportional to a tracking error signal offset component from a tracking servo demand signal, applying a scaling factor to match the scaling applied to the tracking servo demand signal with scaling applied to the amplified tracking error signal, and subtracting the product of this function from the source signal i.e. the tracking error signal. The modified source signal, following this operation, has a reduced order of tracking error offset.

Abstract translation: 跟踪误差校正的方法，主要用于使用单光束拾取头的光盘驱动器。 通过由跟踪伺服需求信号提取与跟踪误差信号偏移分量成比例的值，将由固有设计特性贡献的单光束拾取头的跟踪伺服中的划线最小化，应用缩放因子以匹配 缩放应用于跟踪伺服需求信号，其中缩放应用于放大的跟踪误差信号，以及从源信号即跟踪误差信号中减去该函数的乘积。 在该操作之后，修改的源信号具有降低的跟踪误差偏移的次序。