公开(公告)号：US06169717A

公开(公告)日：2001-01-02

申请号：US09119087

申请日：1998-07-20

申请人： Je-kook Kim ,  Jeong-cheol Shin ,  Young-wook Jang

发明人： Je-kook Kim ,  Jeong-cheol Shin ,  Young-wook Jang

IPC分类号： G11B700

CPC分类号： G11B20/10009 ,  G11B20/18

摘要： An optical disk reading apparatus and method compensate for errors in the full period of an EFM signal. An RF amplifier converts an optical signal reflected from an optical disk into an analog electrical signal. A signal converter converts the analog signal into a digital signal which is modulated to provide an EFM signal. A full period compensating portion compensates for full period errors in the EFM signal and outputs the error compensated EFM signal. An error correcting portion corrects the errors of the compensated EFM signal using an error correction code. Image quality is improved by removing the full period errors.

摘要翻译： 一种光盘读取装置和方法补偿EFM信号的整个周期中的错误。 RF放大器将从光盘反射的光信号转换为模拟电信号。 信号转换器将模拟信号转换成被调制以提供EFM信号的数字信号。 全周期补偿部分补偿EFM信号中的全周期误差，并输出误差补偿的EFM信号。 误差校正部分使用纠错码校正补偿的EFM信号的误差。 通过删除全部周期错误来改善图像质量。

公开(公告)号：US06700857B1

公开(公告)日：2004-03-02

申请号：US09704987

申请日：2000-11-02

申请人： Je-kook Kim ,  Young-wook Jang ,  Bom-yun Kim

发明人： Je-kook Kim ,  Young-wook Jang ,  Bom-yun Kim

IPC分类号： G11B700

CPC分类号： G11B7/1263 ,  G11B7/0903

摘要： Method and apparatus for controlling the light power of an optical disk system, and optical disk system having the same are provided. The optical disk system includes a microcontroller for controlling the operation of the optical disk system, a light power adjusting apparatus for generating a light quantity control signal for controlling the quantity of light emitted from the optical disk, and an optical pickup device for adjusting the quantity of light emitted from the optical disk in response to the light quantity control signal. The method includes the steps of converting E and F beam signals used for generating a tracking error signal into the form of voltage and synthesizing the converted E and F beam signals to obtain a tracking sum signal; maintaining the light power of the light emitting diode when the level of the tracking sum signal is the same as that of a reference signal; decreasing the light power of the light emitting diode, corresponding to the difference between the tracking sum signal and the reference signal, when the level of the travel sum signal is higher than that of the reference signal; and increasing the light power of the light emitting diode, corresponding to the difference between the tracking sum signal and the reference signal, when the level of the travel sum signal is lower than that of the reference signal. The progress of the method returns back to the stop of obtaining a tracking sum signal after increasing or decreasing the light power. Accordingly, the quantity of light reflected from the an optical disk can be constantly maintained.

摘要翻译： 提供了用于控制光盘系统的光功率的方法和装置，以及具有该光盘系统的光盘系统。 光盘系统包括用于控制光盘系统的操作的微控制器，用于产生用于控制从光盘发射的光量的光量控制信号的光功率调节装置，以及用于调节光量的光学拾取装置 响应于光量控制信号从光盘发射的光。 该方法包括以下步骤：将用于产生跟踪误差信号的E和F波束信号转换为电压形式，并合成转换的E和F波束信号以获得跟踪和信号; 当跟踪和信号的电平与参考信号的电平相同时，保持发光二极管的光功率; 当旅行和信号的电平高于参考信号的电平时，减小对应于跟踪和信号与参考信号之间的差的发光二极管的光功率; 并且当旅行和信号的电平低于参考信号的电平时，增加对应于跟踪和信号和参考信号之间的差的发光二极管的光功率。 该方法的进展返回到在增加或减少光功率之后获得跟踪和信号的停止。 因此，可以恒定地维持从光盘反射的光量。

公开(公告)号：US07616537B2

公开(公告)日：2009-11-10

申请号：US10677192

申请日：2003-10-02

申请人： Je-kook Kim ,  Suk-jung Lee ,  Young-wook Jang

发明人： Je-kook Kim ,  Suk-jung Lee ,  Young-wook Jang

IPC分类号： G11B7/095

CPC分类号： G11B7/08511

摘要： Provided are a focus search apparatus and method for performing a focus search after moving an optical pickup to a focus-on point according to a signal output from a sine wave generator so that a stable and smooth focus search is performed. In the focus search method, a sine wave is generated in response to a focus search command. The focus search is performed using an optical pickup in response to the sine wave. The optical pickup is driven in response to an amplitude of the sine wave during the focus search and in response to a filtered focus error signal during a focus servo.

摘要翻译： 提供了一种聚焦搜索装置和方法，用于根据从正弦波发生器输出的信号将光学拾取器移动到聚焦点之后进行聚焦搜索，从而进行稳定和平滑的焦点搜索。 在聚焦搜索方法中，响应于焦点搜索命令产生正弦波。 使用光学拾取器响应于正弦波执行焦点搜索。 在聚焦搜索期间响应于正弦波的幅度并且响应于聚焦伺服期间的滤波的聚焦误差信号来驱动光学拾取器。

公开(公告)号：US20050068872A1

公开(公告)日：2005-03-31

申请号：US10706819

申请日：2003-11-12

申请人： Je-kook Kim ,  Young-wook Jang ,  Suk-jung Lee

发明人： Je-kook Kim ,  Young-wook Jang ,  Suk-jung Lee

IPC分类号： G11B5/58 ,  G11B7/00 ,  G11B7/09 ,  G11B19/12

CPC分类号： G11B7/0945 ,  G11B19/12 ,  G11B2007/0006

摘要： Provided are an apparatus and method for detecting a type of an optical disc inserted into an optical disc system and/or adjusting a track balance in the optical disc system by detecting voltages of a focus error signal and a tracking error signal. For detecting a type of an optical disc inserted into an optical disc system, the apparatus comprising: an analog-to-digital converter that converts a focus error signal into n-bit voltage data; and a duty measurer that compares the n-bit voltage data with a positive noise voltage level and a negative noise voltage level, upcounts by a predetermined value if the n-bit voltage data is higher than the positive noise voltage level or lower than the negative voltage level, and outputs the upcounted result as a duty of the focus error signal.

摘要翻译： 提供了一种用于通过检测聚焦误差信号和跟踪误差信号的电压来检测插入到光盘系统中的光盘的类型和/或调整光盘系统中的轨道平衡的装置和方法。 为了检测插入到光盘系统中的光盘的类型，该装置包括：将聚焦误差信号转换成n位电压数据的模数转换器; 以及将n位电压数据与正噪声电压电平和负噪声电压电平进行比较的负载测量器，如果n位电压数据高于正噪声电压电平或低于负电平，则向上计数预定值 电压电平，并输出计数结果作为聚焦误差信号的占空比。

公开(公告)号：US06879549B2

公开(公告)日：2005-04-12

申请号：US10226919

申请日：2002-08-23

申请人： Je-kook Kim ,  Young-wook Jang

发明人： Je-kook Kim ,  Young-wook Jang

IPC分类号： G11B7/085 ,  B60Q1/44 ,  G11B7/00 ,  G11B7/08 ,  G11B19/22 ,  G11B21/08

CPC分类号： G11B7/08517

摘要： A brake signal generating circuit and method for improving the efficiency of a lens brake in an optical disc reproducing system are provided. The brake signal generating circuit includes: a brake signal generator which receives a mirror signal that detects the track movement of a main beam and generates a first brake signal or a second brake signal for selecting predetermined operation mode signals in response to a first brake selection signal; a first operation mode generator which generates a processing value of the gain and phase of a tracking error as a first operation mode signal in response to a predetermined first control signal; a second operation mode generator which generates a correction value of a tracking loop offset as a second operation mode signal in response to a second control signal; a third operation mode generator which generates a value obtained by multiplying a value of the first operation mode signal by a predetermined value K1, where K1 is a non-zero real number, as a third operation mode signal; a fourth operation mode generator which generates as a fourth operation mode signal a value obtained by subtracting the value of the first operation mode signal from a value of the second operation mode signal, multiplying the result of the subtraction by the predetermined value K1, and adding the value of the second operation mode signal to the product; a fifth operation mode generator which generates a predetermined reference voltage as a fifth operation mode signal; and a switch unit which outputs one of the first through fifth operation mode signals in response to the first or second brake signal and second through fourth brake selection signals. The amount of braking is inverted in accordance with the amount of error in a track deviation direction and multiplied by a gain factor to improve the brake efficiency. In addition, the settling time after a track jump is reduced, the data access can be faster, and the unstable state, for example, due to track skipping, can return to the original stable state quickly.

公开(公告)号：US07061194B2

公开(公告)日：2006-06-13

申请号：US10700644

申请日：2003-11-04

申请人： Je-kook Kim ,  Young-wook Jang

发明人： Je-kook Kim ,  Young-wook Jang

IPC分类号： H02P1/00 ,  H02P1/22 ,  H02P1/40 ,  H02P3/00 ,  H02P3/20

CPC分类号： G11B19/28 ,  G11B19/247 ,  H02P6/08

摘要： A method and an apparatus for precisely controlling the rotation speed of a spindle motor in an optical system according to a given condition are provided. The method involves counting in response to a clock signal widths of first and second logic states of an input signal, which varies with rotation speed of the spindle motor, when an operation control command is issued, comparing a predetermined reference value with a count value for one check cycle, and outputting the comparison result; and controlling the constant linear velocity of the spindle motor in response to the comparison result.

摘要翻译： 提供了一种用于在根据给定条件的光学系统中精确控制主轴电动机的转速的方法和装置。 所述方法包括响应于当发出操作控制命令时与主轴电动机的转速变化的输入信号的第一和第二逻辑状态的时钟信号宽度进行计数，将预定参考值与计数值进行比较 一个检查周期，并输出比较结果; 并根据比较结果控制主轴电机的恒定线速度。

公开(公告)号：US20090157986A1

公开(公告)日：2009-06-18

申请号：US12272100

申请日：2008-11-17

申请人： Kwan-ho Kim ,  Jong-in Kim ,  Young-wook Jang ,  Dae-woong Kim ,  Bong-chun Kang

发明人： Kwan-ho Kim ,  Jong-in Kim ,  Young-wook Jang ,  Dae-woong Kim ,  Bong-chun Kang

IPC分类号： G06F12/00

CPC分类号： G06F3/061 ,  G06F3/0629 ,  G06F3/0679 ,  G06F13/4239

摘要： A memory controller includes an digitally programmable delay unit having a selectable delay time receiving a read-enable signal and outputting a delayed read-enable signal. The delay time is selected in response to an externally applied delay-control signal. A sampling unit in the memory controller outputs data received from a separate memory, in synchronization with the delayed enable signal. The delay time may be a multiple of the period of a clock signal.

摘要翻译： 存储器控制器包括具有可选延迟时间的数字可编程延迟单元，其接收读取使能信号并输出​​延迟的读取使能信号。 响应于外部施加的延迟控制信号来选择延迟时间。 存储器控制器中的采样单元与延迟的使能信号同步地输出从单独的存储器接收的数据。 延迟时间可以是时钟信号的周期的倍数。

公开(公告)号：US08930739B2

公开(公告)日：2015-01-06

申请号：US12272100

申请日：2008-11-17

申请人： Kwan-ho Kim ,  Jong-in Kim ,  Young-wook Jang ,  Dae-woong Kim ,  Bong-chun Kang

发明人： Kwan-ho Kim ,  Jong-in Kim ,  Young-wook Jang ,  Dae-woong Kim ,  Bong-chun Kang

IPC分类号： G06F1/00 ,  G06F1/04 ,  G06F13/42

CPC分类号： G06F3/061 ,  G06F3/0629 ,  G06F3/0679 ,  G06F13/4239

摘要： A memory controller includes an digitally programmable delay unit having a selectable delay time receiving a read-enable signal and outputting a delayed read-enable signal. The delay time is selected in response to an externally applied delay-control signal. A sampling unit in the memory controller outputs data received from a separate memory, in synchronization with the delayed enable signal. The delay time may be a multiple of the period of a clock signal.

摘要翻译： 存储器控制器包括具有可选延迟时间的数字可编程延迟单元，其接收读取使能信号并输出​​延迟的读取使能信号。 响应于外部施加的延迟控制信号来选择延迟时间。 存储器控制器中的采样单元与延迟的使能信号同步地输出从单独的存储器接收的数据。 延迟时间可以是时钟信号的周期的倍数。

公开(公告)号：US08429485B2

公开(公告)日：2013-04-23

申请号：US12557651

申请日：2009-09-11

申请人： Kwan-ho Kim ,  Jong-in Kim ,  Young-wook Jang ,  Hee-dong Shin ,  Bong-chun Kang ,  Jong-jin Lee

发明人： Kwan-ho Kim ,  Jong-in Kim ,  Young-wook Jang ,  Hee-dong Shin ,  Bong-chun Kang ,  Jong-jin Lee

IPC分类号： H03M13/05 ,  H03M13/33

CPC分类号： G06F11/10 ,  G06F11/1008 ,  H03M13/37 ,  H03M13/3707

摘要： A method and apparatus for detecting a free page of a memory device, and a method and apparatus for decoding an error correction code by using the method and apparatus for detecting a free page are provided. Free page data read from the memory is converted into a converted codeword for inclusion as an element of an error correction code field. The converted codeword is compared to an initially set target codeword to detect an amount of non-identical bits. A page read from the memory is determined to be a free page when the amount of non-identical bits is equal to or less than an initially set threshold value.

摘要翻译： 提供一种用于检测存储装置的自由页面的方法和装置，以及通过使用用于检测空闲页面的方法和装置来解码纠错码的方法和装置。 从存储器读取的自由页面数据被转换为转换的码字，以作为纠错码字段的元素。 将转换的码字与初始设置的目标码字进行比较，以检测不相同比特的量。 当不相同比特量等于或小于初始设置的阈值时，从存储器读取的页面被确定为空闲页面。

公开(公告)号：US20100070821A1

公开(公告)日：2010-03-18

申请号：US12557651

申请日：2009-09-11

申请人： KWAN-HO KIM ,  Jong-in Kim ,  Young-wook Jang ,  Hee-dong Shin ,  Bong-chun Kang ,  Jong-jin Lee

发明人： KWAN-HO KIM ,  Jong-in Kim ,  Young-wook Jang ,  Hee-dong Shin ,  Bong-chun Kang ,  Jong-jin Lee

IPC分类号： G06F12/00 ,  H03M13/05 ,  G06F11/10

CPC分类号： G06F11/10 ,  G06F11/1008 ,  H03M13/37 ,  H03M13/3707

摘要： A method and apparatus for detecting a free page of a memory device, and a method and apparatus for decoding an error correction code by using the method and apparatus for detecting a free page are provided. Free page data read from the memory is converted into a converted codeword for inclusion as an element of an error correction code field. The converted codeword is compared to an initially set target codeword to detect an amount of non-identical bits. A page read from the memory is determined to be a free page when the amount of non-identical bits is equal to or less than an initially set threshold value.

摘要翻译： 提供一种用于检测存储装置的自由页面的方法和装置，以及通过使用用于检测空闲页面的方法和装置来解码纠错码的方法和装置。 从存储器读取的自由页面数据被转换为转换的码字，以作为纠错码字段的元素。 将转换的码字与初始设置的目标码字进行比较，以检测不相同比特的量。 当不相同比特量等于或小于初始设置的阈值时，从存储器读取的页面被确定为空闲页面。