公开(公告)号：US06965659B2

公开(公告)日：2005-11-15

申请号：US09917234

申请日：2001-07-30

Applicant: Jae-wook Lee ,  Dae-yun Shim

Inventor： Jae-wook Lee ,  Dae-yun Shim

IPC: G11B20/16 ,  G11B20/10 ,  G11B20/14 ,  H04L7/033 ,  H04L7/00

CPC classification number: G11B20/10037 ,  G11B20/10527 ,  G11B20/1403 ,  H04L7/0334

Abstract: A device and method for detecting a period of an input signal including a count value setting portion; an A/D converter; a zero cross point detecting portion to detect a symbol change of digital values received from the A/D converter; a arithmetic processing unit; a counter; and a period value calculating portion. The arithmetic processing unit divides two sampling sectors, having a zero cross point in their center, by a preset value which is set in the count value setting portion, predicts a zero cross point sector based on the digital values of two sampling points, and calculates a count value of the reference clock in accordance with the predicted zero cross point sector and the preset value which is set in the count value setting portion.

Abstract translation: 一种用于检测包括计数值设置部分的输入信号的周期的装置和方法; A / D转换器; 零交叉点检测部分，用于检测从A / D转换器接收的数字值的符号变化; 算术处理单元; 柜台 以及周期值计算部。 算术处理单元将在其中心具有零交叉点的两个采样扇区除以设定在计数值设定部分中的预设值，基于两个采样点的数字值预测零交叉点扇区，并计算 根据预测的零交叉点扇区的参考时钟的计数值和在计数值设定部分中设定的预设值。

公开(公告)号：US20050053174A1

公开(公告)日：2005-03-10

申请号：US10869851

申请日：2004-06-18

Applicant: Hyun-Soo Park ,  Jae-Wook Lee ,  Eun-Jin Ryu ,  Jae-Seong Shim ,  Eing-Seob Cho ,  Jung-Hyun Lee

Inventor： Hyun-Soo Park ,  Jae-Wook Lee ,  Eun-Jin Ryu ,  Jae-Seong Shim ,  Eing-Seob Cho ,  Jung-Hyun Lee

IPC: G11B20/14 ,  G11B20/10 ,  H04B1/10

CPC classification number: G11B20/10101 ,  G11B20/10009 ,  G11B20/10296 ,  G11B2020/1288 ,  G11B2220/2541

Abstract: A device and method for data reproduction of an optical disk generating an optimized reference level optimizing a channel characteristic, the device includes a channel identifier which receives an input signal of an equalizer and detects an optimum level, and an adaptation process which by using the detected optimum level, updates the coefficient of the equalizer. Accordingly, the data reproduction device and method can detect a reference level value capable of maximizing the performance of a viterbi decoder and limit noise caused by tilt and other effects that may occur by the shape of a disk or a pickup apparatus.

Abstract translation: 一种用于产生优化信道特性的优化参考电平的光盘的数据再现的装置和方法，该装置包括接收均衡器的输入信号并检测最佳电平的信道标识符，以及通过使用检测到的适配过程 最佳级别，更新均衡器的系数。 因此，数据再现装置和方法可以检测能够最大化维特比解码器的性能的参考电平值，并限制由于盘或拾取装置的形状可能发生的倾斜和其它效应引起的噪声。