公开(公告)号：US07283440B2

公开(公告)日：2007-10-16

申请号：US10073061

申请日：2002-02-12

Applicant: Kun-soo Kim ,  In-wook Hwang ,  Pyong-yong Seong

Inventor： Kun-soo Kim ,  In-wook Hwang ,  Pyong-yong Seong

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G11B7/0903 ,  G11B7/0943 ,  G11B7/1275 ,  G11B7/131 ,  G11B2007/0006

Abstract: An optical recording/reproducing apparatus includes an optical pickup and a signal processor. The optical pickup includes an optical splitting device which splits light emitted from a first light source into a main light beam and sub-light beams which are symmetrical with respect to the main light beam and irradiates the split light beams on a recording medium, and a light detection device which receives the main light beam and the sub-light beams reflected by the recording medium, so as to detect a tracking error signal in a three-beam method and one of a push-pull method and an improved push-pull method. The signal processor receives the detection signals output by the light detection device and detects the tracking error signal in the three-beam method and one of the push-pull method and the improved push-pull method, and otherwise selectively detects the tracking error signal in one of the three-beam method, the push-pull method and the improved push-pull method, so as to realize an optimal tracking servo-control. Since a selective use of one of the improved push-pull method, the push-pull method and the three-beam method can be made according to the type of an optical disc, the optimal tracking servo-control can be realized regardless of the depth of a pit in an optical disc during a reproduction of data from the optical disc, such as a non-rewritable optical disc.

Abstract translation: 光学记录/再现装置包括光学拾取器和信号处理器。 光拾取器包括将从第一光源发射的光分成主光束的光分束装置和相对于主光束对称的子光束，并将分束光束照射在记录介质上， 光检测装置，其接收主光束和由记录介质反射的子光束，以便以三光束方式检测跟踪误差信号，并且推挽方法和改进的推挽方法之一 。 信号处理器接收由光检测装置输出的检测信号，并以三光束方式检测跟踪误差信号以及推挽方法和改进的推挽方法之一，否则选择性地检测跟踪误差信号 三波束法，推挽法和推挽法改进，实现了最优跟踪伺服控制。 由于可以选择性地使用改进的推挽方法之一，可以根据光盘的类型进行推挽方式和三光束方式，可以实现最佳的跟踪伺服控制，而与深度无关 在从诸如不可重写光盘的光盘再现数据期间光盘中的凹坑。

公开(公告)号：US6061318A

公开(公告)日：2000-05-09

申请号：US956038

申请日：1997-10-24

Applicant: In-Wook Hwang

Inventor： In-Wook Hwang

IPC: G11B7/004 ,  G11B7/085 ,  G11B7/09 ,  G11B19/12 ,  G11B3/90 ,  G11B7/00

CPC classification number: G11B19/12 ,  G11B7/0945 ,  G11B7/0908

Abstract: A digital versatile disc (DVD) system compatible with a compact disc (CD), a single-layered DVD and a multi-layered DVD having respectively different structures. The DVD system discriminates a type of a disc loaded on a turntable according to the time and number represented by reflection characteristic curves of a focus error signal detected during performing an initial focus search operation for the disc. The DVD system calculates the size of a waveform of the focus error signal having a reflection characteristic curve obtained from a reflection layer of the disc in a focus-up section, and determines the disc as a multi-layered DVD having two reflection layers when two reflection characteristic curves exist and have a magnitude which is between a first reference value and a second reference value. Otherwise, the DVD system determines the disc as a CD being relatively thicker if the detection time of a reflection characteristic curve is longer than a predetermined time, and determines the disc as a single-layered DVD if the detection time is shorter than the predetermined time, based on the comparison result between the detection time of the reflection characteristic curve and the predetermined time. The DVD system quickly discriminates between a CD and a DVD, thereby providing an effect that error caused during performing a playback operation can be reduced in the DVD system compatible with the DVD and the CD.

Abstract translation: 与光盘（CD）兼容的数字通用光盘（DVD）系统，单层DVD和具有不同结构的多层DVD。 DVD系统根据在执行光盘的初始焦点搜索操作期间检测到的聚焦误差信号的反射特性曲线表示的时间和数量来鉴别装载在转盘上的盘的类型。 DVD系统计算在聚焦部分中从光盘的反射层获得的具有反射特性曲线的聚焦误差信号的波形的大小，并将该光盘确定为具有两个反射层的多层DVD，当两 存在反射特性曲线并具有在第一参考值和第二参考值之间的幅度。 否则，如果反射特性曲线的检测时间长于预定时间，则DVD系统将光盘确定为相对较厚的CD，并且如果检测时间短于预定时间，则将该盘确定为单层DVD 基于反射特性曲线的检测时间与预定时间之间的比较结果。 DVD系统快速区分CD和DVD，从而提供在与DVD和CD兼容的DVD系统中可以减少在执行播放操作期间引起的错误的效果。

公开(公告)号：US5825726A

公开(公告)日：1998-10-20

申请号：US723566

申请日：1996-09-30

Applicant: In-Wook Hwang ,  Jeong-Ho Park

Inventor： In-Wook Hwang ,  Jeong-Ho Park

IPC: G11B19/02 ,  G11B20/12 ,  G11B27/00 ,  G11B27/034 ,  G11B27/10 ,  G11B27/32 ,  G11B7/00

CPC classification number: G11B27/329 ,  G11B19/02 ,  G11B20/1217 ,  G11B27/034 ,  G11B27/105 ,  G11B2220/218 ,  G11B2220/2545

Abstract: A method for recording and reproducing a multi-session compact disc (CD) which allots a total TOC (TTOC) information storage area, including position information of respective sessions, to a specific area of the CD which enables high-speed access to data recorded on the CD. The disc recorded according to a multi-session mode recording operation includes a PMA area, a plurality of sessions respectively consisting of a lead-in area (LIN), a program area (PGM) and a lead-out area (LOT), and a total TOC area TTOC at the outermost circumferential area of the disc. A total TOC information storage area is allotted to the outermost circumferential area of the disc and the TOCs of respective sessions are recorded in the total TOC TTOC information storage area when recording is finished. High speed access to data recorded on the disc is performed by reading out position information from the total TOC area of the respective sessions.

Abstract translation: 一种用于记录和再现多会议光盘（CD）的方法，其将包括各个会话的总体TOC（TTOC）信息存储区域（包括各个会话的位置信息）分配到CD的特定区域，其能够高速访问所记录的数据 在CD上。 根据多会话模式记录操作记录的盘包括PMA区，分别由导入区（LIN），程序区（PGM）和导出区（LOT）组成的多个会话，以及 在盘的最外周区域的总TOC面积TTOC。 总TOC信息存储区域被分配到盘的最外周区域，并且当记录完成时，各会话的TOC被记录在总TOC TTOC信息存储区域中。 通过从相应会话的总TOC区域读出位置信息来执行对盘上记录的数据的高速访问。

公开(公告)号：US06282161B1

公开(公告)日：2001-08-28

申请号：US09369127

申请日：1999-08-05

Applicant: Yong-ki Son ,  Pyong-yong Seong ,  Byung-ryul Ryoo ,  Seok-jung Kim ,  Joong-eon Seo ,  In-wook Hwang ,  Young-sun Seo

Inventor： Yong-ki Son ,  Pyong-yong Seong ,  Byung-ryul Ryoo ,  Seok-jung Kim ,  Joong-eon Seo ,  In-wook Hwang ,  Young-sun Seo

IPC: G11B390

CPC classification number: G11B7/0956

Abstract: An optical recording and reproducing apparatus for adjusting a tilt of an optical pickup in accordance with an amount of jitter of a reproduction signal, a tilt adjusting method therefor, and a recording control method. The optical recording and reproducing apparatus includes an optical pickup having an object lens, a tilt adjusting unit for adjusting a tilt angle of the object lens, a jitter detecting unit for detecting an amount of jitter of a reproducing signal generated by the optical pickup from a disk, and a tilt controlling unit for minimizing the amount of jitter by feeding the amount of jitter detected by the jitter detecting unit back to the tilt adjusting unit. According to the optical recording and reproducing apparatus, there is no need for a space in which a displacement sensor detecting the tilt angle of the optical pickup faces the disk.

Abstract translation: 一种用于根据再现信号的抖动量，其倾斜调整方法和记录控制方法来调整光学拾取器的倾斜的光学记录和再现装置。 光学记录和再现装置包括具有物镜的光学拾取器，用于调节物镜的倾斜角度的倾斜调节单元，用于检测由光学拾取器产生的再现信号的抖动量的抖动检测单元， 盘和倾斜控制单元，用于通过将由抖动检测单元检测到的抖动量馈送回倾斜调节单元来最小化抖动量。 根据光学记录和再现装置，不需要用于检测光学拾取器的倾斜角度的位移传感器面对盘的空间。

公开(公告)号：US6058082A

公开(公告)日：2000-05-02

申请号：US957499

申请日：1997-10-24

Applicant: In-Wook Hwang

Inventor： In-Wook Hwang

IPC: G11B7/0037 ,  G11B7/004 ,  G11B7/085 ,  G11B7/09 ,  G11B19/12 ,  G11B7/00

CPC classification number: G11B19/12 ,  G11B7/0037 ,  G11B7/0945

Abstract: A digital versatile disc (DVD) system compatible with a compact disc (CD), a single-layered DVD and a multi-layered DVD having respectively different structures. The DVD system discriminates a type of a disc loaded on a turntable according to the number of detections and magnitudes represented by reflection characteristic curves of a focus error signal detected during performing an initial focus search operation for the disc. In case the disc is a compact disc (CD) of 1.2 mm thickness, a focus error signal detected during performing a focus search of the disc is indicated as a reflection characteristic curve of a level between predetermined two reference values. In case of a DVD of 0.6 mm thickness, a single-layered structure is indicated as a reflection characteristic curve having a larger level than the two reference values, and a multi-layered structure is indicated as two reflection characteristic curves having a level between the two reference values, respectively. Using the above characteristics, the type of a disc is discriminated by checking the size and number of times of the reflection characteristic curves of the focus error signal obtained in the focus-up state during performing an initial focus search. Also, since a detection time of the focus error signal is checked, the type of a disc is more accurately discriminated. The present invention quickly discriminates the type of the CD and DVD, thereby providing an effect that error caused during performing a playback operation can be reduced in the DVD system compatible with the DVD and the CD.

Abstract translation: 与光盘（CD）兼容的数字通用光盘（DVD）系统，单层DVD和具有不同结构的多层DVD。 DVD系统根据在执行用于盘的初始焦点搜索操作期间检测到的聚焦误差信号的反射特性曲线所表示的检测次数和幅度来鉴别装载在转盘上的盘的类型。 在盘是厚度为1.2mm的光盘（CD）的情况下，在执行盘的聚焦搜索期间检测到的聚焦误差信号被指示为预定的两个参考值之间的电平的反射特性曲线。 在厚度为0.6mm的DVD的情况下，单层结构被指示为具有比两个参考值更大的水平的反射特性曲线，并且多层结构被表示为两个反射特性曲线， 两个参考值分别。 使用上述特征，通过检查在执行初始聚焦搜索期间在聚焦向上状态中获得的聚焦误差信号的反射特性曲线的大小和次数来识别盘的类型。 此外，由于检查了聚焦误差信号的检测时间，因此更准确地识别光盘的类型。 本发明快速地辨别CD和DVD的类型，从而提供了在与DVD和CD兼容的DVD系统中可以减少在执行重放操作期间引起的错误的效果。