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1. 发明公开

EP1610307A3 Wobble signal detection circuit and optical disk device 有权
标题翻译：摆动信号检测电路和光盘装置
公开(公告)号：EP1610307A3
公开(公告)日：2006-01-04
申请号：EP05019079.2
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/09
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257
摘要： A wobble signal detection circuit for detecting a wobble signal based on signals provided from first and second light receiving elements that are divided from each other in a direction tangential to a spiral or concentric recording region of an optical recording medium in which the first and second light receiving elements receive light that is reflected from a surface of the optical recording medium. The wobble signal detection circuit comprises first and second amplitude adjustment circuits for adjusting an amplitude of first and second voltage signals so that the amplitude of the voltage signals can be equal to a target amplitude, wherein the first and second voltage signals corresponds to electric signals converted from a light signal being based on the reflected light received by first and second light receiving elements, and outputting the adjusted voltage signals, a target amplitude setting circuit for setting the target amplitude achieved by the first and second amplitude adjustment circuits, and a subtracting circuit for outputting the wobble signal that is a difference in level between the adjusted first and second voltage signal outputs by the adjustment circuits. The target amplitude may be set differently during recording and reproduction to prevent detection error of the wobble signal immediately after switching between recording and reproduction.
摘要翻译：一种摆动信号检测电路，用于基于从第一和第二光接收元件提供的信号来检测摆动信号，所述信号在与光学记录介质的螺旋或同心记录区域相切的方向上彼此分开，其中第一和第二光接收元件接收从光学记录介质的表面反射的光。摆动信号检测电路包括第一和第二幅度调节电路，用于调节第一和第二电压信号的幅度，使得电压信号的幅度可以等于目标幅度，其中第一和第二电压信号对应于转换的电信号根据基于由第一和第二光接收元件接收的反射光的光信号，并输出调整后的电压信号;目标幅度设置电路，用于设置由第一和第二幅度调整电路实现的目标幅度;以及减法电路用于输出摆动信号，该摆动信号是调整电路在调整后的第一和第二电压信号输出之间的电平差。在记录和再现期间可以不同地设置目标幅度，以防止在记录和再现之间切换之后立即检测到摆动信号的误差。

2. 发明公开

EP1610306A3 Wobble signal detection circuit and optical disk device 有权
标题翻译：检测电路波动信号，和光盘装置
公开(公告)号：EP1610306A3
公开(公告)日：2006-01-04
申请号：EP05019078.4
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/0045 , G11B7/09
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257
摘要： A wobble signal detection circuit comprises a first circuit for adjusting an amplitude of a first voltage signal corresponding to an electric signal converted from a light signal based on the light received by a first light receiving element, and outputting an adjusted first voltage signal, a second circuit for adjusting an amplitude of a second voltage signal corresponding to an electric signal converted from a light signal being based on the light received by a second light receiving element, and outputting an adjusted second voltage signal, and a speed setting circuit for setting first and second response speeds of the first amplitude adjustment circuit to the input thereto, and the first and second response speeds of the second amplitude adjustment circuit to the input thereto so that the first response speed set immediately after switching between a recording operation and a reproducing operation is performed is larger than the second response speed set during the recording operation. Accordingly even when the signal level detecting during recording is different from that during reproduction, the wobble signal may be accurately detected immediately after switching between recording and reprodution. Further, during recording the response speed may be set low so that signal changes due to scratches or the like do not affect operation.

3. 发明公开

EP1610308A1 Wobble signal detection circuit and optical disk device 有权
标题翻译： Erfassungsschaltung schwankender Signale und optische Plattenvorrichtung
公开(公告)号：EP1610308A1
公开(公告)日：2005-12-28
申请号：EP05019080.0
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/0045
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257
摘要： A wobble signal detection circuit for detecting a wobble signal based on signals provided from first and second light receiving elements that are divided from each other in a direction tangential to a spiral or concentric recording region of an optical recording medium in which the first and second light receiving elements receive light that is reflected from a surface of the optical recording medium. The wobble signal detection circuit comprises a first sample circuit for, in sync with a specific control signal, sampling a first voltage signal corresponding to an electric signal converted from a light signal being based on the reflected light received by the first light receiving element, wherein the specific control signal is specific to a period for forming a space region when recording information on the optical recording medium; a first amplifying circuit for amplifying an amplitude of the sampled first voltage signal output from the first sample circuit, and outputting the amplified first voltage signal; a second sample circuit for, in sync with the specific control signal, sampling a second voltage signal corresponding to an electric signal converted from a light signal being based on the reflected light received by the second light receiving element; a second amplifying circuit for amplifying the sampled second voltage signal output from the second sample circuit, and outputting the amplified second voltage signal; and an arithmetic processing circuit for receiving the amplified first voltage signal output by the first amplifying circuit, the amplified second voltage signal output by the second amplifying circuit, the first voltage signal output by the first light receiving element, and the second voltage signal output by the second light receiving circuit, and for performing an arithmetic process on the received signals so as to output the wobble signal.
摘要翻译：一种摆动信号检测电路，用于根据第一和第二光接收元件提供的信号来检测摆动信号，所述信号在与光学记录介质的螺旋或同心记录区域相切的方向上彼此分开，其中第一和第二光接收元件接收从光记录介质的表面反射的光。摆动信号检测电路包括与特定控制信号同步的第一采样电路，对与由第一光接收元件接收的反射光进行光信号转换的电信号相对应的第一电压信号进行采样，其中，特定控制信号特定于在光学记录介质上记录信息时形成空间区域的周期; 第一放大电路，用于放大从第一采样电路输出的采样的第一电压信号的幅度，并输出放大的第一电压信号; 用于与特定控制信号同步的第二采样电路，对与由基于由第二光接收元件接收的反射光的光信号转换的电信号相对应的第二电压信号进行采样; 第二放大电路，用于放大从第二采样电路输出的采样的第二电压信号，并输出放大的第二电压信号; 以及运算处理电路，用于接收由第一放大电路输出的放大的第一电压信号，由第二放大电路输出的放大的第二电压信号，由第一光接收元件输出的第一电压信号和由第一放大电路输出的第二电压信号第二光接收电路，并且用于对接收到的信号执行运算处理，以输出摆动信号。

4. 发明授权

EP1610307B1 Wobble signal detection circuit and optical disk device 有权
标题翻译：用于光盘的摆动信号检测电路和装置
公开(公告)号：EP1610307B1
公开(公告)日：2009-06-24
申请号：EP05019079.2
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/0045 , G11B7/09
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257

5. 发明公开

EP1610307A2 Wobble signal detection circuit and optical disk device 有权
标题翻译： Wobbelsignal-Detektionsschaltung und Vorrichtung fur optischen Platten
公开(公告)号：EP1610307A2
公开(公告)日：2005-12-28
申请号：EP05019079.2
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/09
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257
摘要： A wobble signal detection circuit for detecting a wobble signal based on signals provided from first and second light receiving elements that are divided from each other in a direction tangential to a spiral or concentric recording region of an optical recording medium in which the first and second light receiving elements receive light that is reflected from a surface of the optical recording medium. The wobble signal detection circuit comprises first and second amplitude adjustment circuits for adjusting an amplitude of first and second voltage signals so that the amplitude of the voltage signals can be equal to a target amplitude, wherein the first and second voltage signals corresponds to electric signals converted from a light signal being based on the reflected light received by first and second light receiving elements, and outputting the adjusted voltage signals, a target amplitude setting circuit for setting the target amplitude achieved by the first and second amplitude adjustment circuits, and a subtracting circuit for outputting the wobble signal that is a difference in level between the adjusted first and second voltage signal outputs by the adjustment circuits. The target amplitude may be set differently during recording and reproduction to prevent detection error of the wobble signal immediately after switching between recording and reproduction.
摘要翻译：一种摆动信号检测电路，用于根据第一和第二光接收元件提供的信号来检测摆动信号，所述信号在与光学记录介质的螺旋或同心记录区域相切的方向上彼此分开，其中第一和第二光接收元件接收从光记录介质的表面反射的光。摆动信号检测电路包括用于调节第一和第二电压信号的幅度的第一和第二幅度调整电路，使得电压信号的幅度可以等于目标幅度，其中第一和第二电压信号对应于转换的电信号从基于由第一和第二光接收元件接收的反射光的光信号，并输出调整后的电压信号，设定由第一和第二幅度调整电路实现的目标幅度的目标幅度设定电路和减法电路用于输出由调节电路在调整后的第一和第二电压信号输出之间的电平差的摆动信号。可以在记录和再现期间不同地设置目标幅度，以防止在记录和再现之间切换之后的摆动信号的检测误差。

6. 发明公开

EP0872831A3 Optical disk drive having a time code detection device for reliably detecting a time code of a recordable optical disk 有权
标题翻译：驱动与用于的时间码可靠的检测的装置的光盘的可写光盘上
公开(公告)号：EP0872831A3
公开(公告)日：1999-08-25
申请号：EP98106712.7
申请日：1998-04-14
申请人： Ricoh Company, Ltd.
发明人： Shigemori, Toshihiro
IPC分类号： G11B7/007 , G11B7/085 , G11B20/12 , G11B20/14 , G11B20/18 , G11B27/19 , G11B27/28 , G11B27/30
CPC分类号： G11B27/24 , G11B7/0037 , G11B7/0045 , G11B7/007 , G11B20/1403 , G11B20/18 , G11B27/034 , G11B27/3027 , G11B27/3063 , G11B2220/216 , G11B2220/218 , G11B2220/2545
摘要： An optical disk drive includes a first detection unit (7, 8) which detects a first time signal and a first error signal, the first time signal indicating a time code of pregrooves of a recordable optical disk (1), the first error signal being indicative of an error of the first time signal. A second detection unit (5, 6) detects a second time signal and a second error signal, the second time signal indicating a time code of recorded data of the disk (1), the second error signal being indicative of an error of the second time signal. A time determination unit (9) determines the first time signal as being a current time when no error of the first time signal is indicated by the first error signal, and determines the second time signal as being the current time when an error of the first time signal is indicated by the first error signal and no error of the second time signal is indicated by the second error signal. A comparator (10) detects whether the determined current time matches with a target time. An encoder (11) starts writing data to the disk when a coincidence of the determined current time and the target time is detected.

7. 发明授权

EP0871173B1 Recording timing control circuit for optical disk driving device 失效
标题翻译：在用于光盘的记录装置记录的同步控制电路
公开(公告)号：EP0871173B1
公开(公告)日：2009-07-22
申请号：EP98106452.0
申请日：1998-04-08
申请人： Ricoh Company, Ltd.
发明人： Shigemori, Toshihiro
IPC分类号： G11B20/14
CPC分类号： G11B27/24 , G11B20/1217 , G11B20/1426 , G11B27/3027 , G11B27/3063 , G11B2020/1239 , G11B2020/1269 , G11B2020/1287 , G11B2020/1461 , G11B2220/216 , G11B2220/218 , G11B2220/2537 , G11B2220/2545

8. 发明授权

EP1610306B1 Wobble signal detection circuit and optical disk device 有权
标题翻译：摆动信号检测电路和光盘装置
公开(公告)号：EP1610306B1
公开(公告)日：2008-05-14
申请号：EP05019078.4
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/0045 , G11B7/09
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257

9. 发明授权

EP1318508B1 Wobble signal detection circuit and optical disk device 有权
标题翻译：检测电路波动信号，和光盘装置
公开(公告)号：EP1318508B1
公开(公告)日：2006-07-05
申请号：EP02258446.0
申请日：2002-12-06
申请人： Ricoh Company, Ltd.
发明人： Maegawa, Hiroshi , Shigemori, Toshihiro
IPC分类号： G11B7/005 , G11B7/09
CPC分类号： G11B7/0045 , G11B7/0053 , G11B7/24082 , G11B27/24 , G11B2220/257

10. 发明公开

EP1515334A2 Recording timing control circuit for optical disk driving device 失效
标题翻译： Aufzeichnung beiAufzeichnungsgerätenfüroptische Platten
公开(公告)号：EP1515334A2
公开(公告)日：2005-03-16
申请号：EP04027176.9
申请日：1998-04-08
申请人： Ricoh Company Ltd.
发明人： Shigemori, Toshihiro
IPC分类号： G11B20/14 , G11B27/19 , G11B27/30
CPC分类号： G11B27/24 , G11B20/1217 , G11B20/1426 , G11B27/3027 , G11B27/3063 , G11B2020/1239 , G11B2020/1269 , G11B2020/1287 , G11B2020/1461 , G11B2220/216 , G11B2220/218 , G11B2220/2537 , G11B2220/2545
摘要： An ATIP decoder (6) detects an ATIP synchronization signal from a wobble signal which was recorded on an optical disk (1) as a wobble of pregrooves formed on the optical disk. A CD encoder (7) performs EFM modulation on information to be recorded, inserting a subcode frame synchronization signal into the information to be recorded at a predetermined position, and outputting an EFM pattern to be recoded. The CD encoder includes an EFM outputting timing control circuit (13) which controls a timing at which the EFM pattern is output. The EFM outputting timing control circuit performs information recording timing initialization, before the EFM pattern is actually recorded on the optical disk, in which initialization the phase between a timing at which the ATIP synchronization signal is detected from the optical disk and a timing at which the subcode frame synchronization signal is recorded on the optical disk is adjustable.
摘要翻译： ATIP解码器（6）从光盘（1）上记录的摆动信号中检测出ATIP同步信号，作为在光盘上形成的预制槽的摆动。 CD编码器（7）对要记录的信息执行EFM调制，将子码帧同步信号插入到要记录在预定位置的信息中，并输出要重新编码的EFM模式。 CD编码器包括EFM输出定时控制电路（13），其控制EFM模式被输出的定时。在EFM图案实际记录在光盘上之前，EFM输出定时控制电路执行信息记录定时初始化，其中初始化从光盘检测到ATIP同步信号的定时与子码帧同步信号记录在光盘上是可调的。

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