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公开(公告)号：US07593300B2
公开(公告)日：2009-09-22
申请号：US09950393
申请日：2001-09-10
IPC分类号： G11B7/00
CPC分类号： G11B7/0945 , G11B7/0946 , G11B7/0948
摘要： An off-format condition in a digital tracking servo is presented. An off-format condition can be detected by low pass filtering a tracking control signal, detecting a DC level over a threshold level, and indicating the off-format condition if the DC level is above the threshold level for a maximum number of cycles.
摘要翻译： 提出了数字跟踪伺服中的非格式化条件。 通过对跟踪控制信号进行低通滤波，检测超过阈值电平的DC电平，以及如果DC电平高于阈值电平以指示最大数量的周期，则可指示离格式条件。
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公开(公告)号：US07057983B2
公开(公告)日：2006-06-06
申请号：US09951331
申请日：2001-09-10
IPC分类号： G11B7/00
CPC分类号： G11B7/1356 , G11B7/08505 , G11B7/08523 , G11B7/08529 , G11B7/08541 , G11B7/08576 , G11B7/09 , G11B7/0901 , G11B7/0912 , G11B7/0938 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/0946 , G11B7/0948 , G11B7/0953 , G11B7/0956 , G11B7/123 , G11B7/131 , G11B19/28
摘要： A control system for controlling tracking and seeking in an optical disc drive for optical media with a pitted premastered area that cannot be overwritten and a grooved user-writeable area that can be overwritten. The control system determines whether an optical pickup unit is over the premastered or the writeable areas of the optical media by measuring peak to peak amplitude of a tracking error signal. Gains and calibration values are selected based on whether an optical pickup unit is over the premastered or the writeable areas of the optical media. Reading from and writing to the optical media is disabled while jumping tracks. Control of jumping tracks on the optical media includes controlling: jumping a single track on the optical media; jumping a specified number of tracks every specified number of revolutions of the optical media; auto jumpbacks, and jumping in forward or reverse directions. Parameters for controlling jumps include at least one of: jump type, number of tracks to jump, time delay between track jumps, number of revolutions of the optical media between jumps, and whether it is not safe to read from or write to the optical media. The control system performs long seeks by predicting whether the tracking actuator arm will be positioned over the premastered area or the writeable area at the end of the long seek, and to load calibration parameters corresponding to the type of media over which the tracking actuator arm will be positioned at the end of the long seek.
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公开(公告)号：US07023776B2
公开(公告)日：2006-04-04
申请号：US09950541
申请日：2001-09-10
IPC分类号： G11B7/00
CPC分类号： G11B7/0945 , G11B2007/0006
摘要： A calibration method for an optical disk drive is presented. The operating parameters of an optical disk drive are initially calibrated when the disk drive is produced or during a repair step. The disk drive is then field calibrated during normal operation. Operating parameters can be field calibrated during power up. Further, operating parameters can be field calibrated when a new optical media is inserted into the optical disk drive. Additionally, operating parameters can be field calibrated during error recovery.
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4.发明授权Tracking and focus servo system with error signal inverse non-linearity calibration 失效跟踪和聚焦伺服系统，具有误差信号反向非线性校准公开(公告)号：US06965547B2
公开(公告)日：2005-11-15
申请号：US09950409
申请日：2001-09-10
CPC分类号： G11B7/0945 , G11B7/094 , G11B7/0941
摘要： A digital servo system of an optical disk drive with a calibrated inverse non-linearity function is disclosed. A look-up table is determined, for example, with a focus error signal gain corresponding with a focus error signal offset so that the response of the focus servo system is substantially linear. Additionally, the look-up table can include tracking error signal gain, tracking error signal offset, or tracking loop gain parameters corresponding with the focus error signal offset.
摘要翻译： 公开了具有校准的反向非线性函数的光盘驱动器的数字伺服系统。 例如，利用与聚焦误差信号偏移相对应的聚焦误差信号增益来确定查找表，使得聚焦伺服系统的响应基本上是线性的。 此外，查找表可以包括对应于聚焦误差信号偏移的跟踪误差信号增益，跟踪误差信号偏移或跟踪环路增益参数。
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公开(公告)号：US07782721B2
公开(公告)日：2010-08-24
申请号：US09950398
申请日：2001-09-10
IPC分类号： G11B7/095
CPC分类号： G11B7/0945 , G11B2007/0006
摘要： A multi-zone calibration system is disclosed. The multi-zone calibration system calibrates the operating parameters of an optical disk drive over a plurality of zones over an optical media. The optical media, in addition, can have writeable and premastered portions. The operating parameters can be calibrated for each of the media types in each of the zones. Additionally, the operating parameters can be calibrated for each type of operation (e.g., read or write) in each zone.
摘要翻译： 公开了一种多区域校准系统。 多区域校准系统通过光学介质校准多个区域上的光盘驱动器的操作参数。 此外，光学介质可以具有可写入和预处理的部分。 可以为每个区域中的每种介质类型校准操作参数。 此外，可以针对每个区域中的每种类型的操作（例如，读取或写入）校准操作参数。
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6.发明授权Calibration storage methods for a digital focus and tracking servo system with calibration 有权用于校准的数字对焦和跟踪伺服系统的校准存储方法公开(公告)号：US07196979B2
公开(公告)日：2007-03-27
申请号：US09950360
申请日：2001-09-10
IPC分类号： G11B7/00
CPC分类号： G11B7/0945
摘要： A method of storing calibrated optical parameters is presented. In some embodiments, calibrated optical parameters are stored in place of stored parameters. In some embodiments, averages between the calibrated operating parameters and stored optical parameters are stored. In other embodiments, the stored optical parameters are allowed to vary only by a maximum amount. In some embodiments, if the calibrated parameters vary by more than threshold values, then the calibrated parameters are not stored.
摘要翻译： 介绍了存储校准光学参数的方法。 在一些实施例中，存储校准的光学参数来代替存储的参数。 在一些实施例中，存储校准的操作参数和存储的光学参数之间的平均值。 在其他实施例中，允许所存储的光学参数仅改变最大量。 在一些实施例中，如果校准参数变化超过阈值，则校准参数不被存储。
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公开(公告)号：US07680004B2
公开(公告)日：2010-03-16
申请号：US09950397
申请日：2001-09-10
IPC分类号： G11B7/00
CPC分类号： G11B7/094 , G11B7/0941
摘要： A servo system with in an optical disk drive with an inverse non-linearity compensation is disclosed. An error signal calculated from signals received from an optical pick-up unit can be offset by an offset value and amplified by a gain in the early stages of a calculation of a control signal for controlling a position of the optical pick-up unit. The non-linearity compensation adjusts the gain based on the offset value so that the response of the servo system to changes in the error signal is substantially linear. The error signal can be the tracking error signal in a tracking servo system and can be the focus error signal in a focus servo system.
摘要翻译： 公开了具有逆非线性补偿的光盘驱动器的伺服系统。 从光学拾取单元接收的信号计算的误差信号可以偏移偏移值，并且在用于控制光学拾取单元的位置的控制信号的计算的早期阶段被增益放大。 非线性补偿基于偏移值来调整增益，使得伺服系统对误差信号的变化的响应基本上是线性的。 误差信号可以是跟踪伺服系统中的跟踪误差信号，并且可以是聚焦伺服系统中的聚焦误差信号。
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公开(公告)号：US07672199B2
公开(公告)日：2010-03-02
申请号：US09950329
申请日：2001-09-10
IPC分类号： G11B7/00
CPC分类号： G11B7/08511
摘要： A focus servo system with a focus close algorithm is disclosed. The focus close algorithm provides a bias control effort to the focus servo system when focus is closed. A method of closing focus includes positioning an optical pick-up unit at a first position away from an optical medium, moving the optical pick-up unit towards a second position by altering a focus control effort, monitoring a sum signal obtained from signals received from the optical pick-up unit, and setting the bias control effort to the focus control effort when a closure criteria is satisfied. In some embodiments, the closure criteria includes that a sum signal exceeds a threshold value. In some embodiments, the closure criteria includes that a focus error signal is below a FES threshold.
摘要翻译： 公开了一种具有聚焦关闭算法的聚焦伺服系统。 聚焦关闭算法在聚焦关闭时为聚焦伺服系统提供偏压控制。 关闭焦点的方法包括将光学拾取单元定位在远离光学介质的第一位置处，通过改变聚焦控制力将光学拾取单元移动到第二位置，监测从从 光学拾取单元，并且当满足关闭标准时，将偏置控制力设置为聚焦控制力。 在一些实施例中，关闭标准包括和信号超过阈值。 在一些实施例中，闭合准则包括聚焦误差信号低于FES阈值。
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公开(公告)号：US07092322B2
公开(公告)日：2006-08-15
申请号：US09950392
申请日：2001-09-10
IPC分类号： G11B7/95
CPC分类号： G11B7/0945 , G11B7/0908 , G11B7/094
摘要： A focus error signal offset calibration is presented. The focus error signal offset can be calibrated by varying the focus error signal offset to optimize an operating characteristic of the optical disk drive. In some embodiments, the operating characteristic can be a servo function. In some embodiments, the operating characteristics can be a read function.
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10.发明授权公开(公告)号：US07023766B2
公开(公告)日：2006-04-04
申请号：US09950373
申请日：2001-09-10
IPC分类号： G11B7/095
CPC分类号： G11B7/1356 , G11B7/08505 , G11B7/08523 , G11B7/08529 , G11B7/08541 , G11B7/08576 , G11B7/09 , G11B7/0901 , G11B7/0912 , G11B7/0938 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/0946 , G11B7/0948 , G11B7/0953 , G11B7/0956 , G11B7/123 , G11B7/131 , G11B19/28
摘要： A system with a plurality of servo algorithms executing on a digital signal processor is presented. The digital signal processor receives a sensor interrupt, indicating availability of digitized data from optical sensors, and decides which of a plurality of servo algorithms to service in response to the interrupt. In some embodiments, the plurality of servo algorithms includes a tracking servo algorithm. In some embodiments, the plurality of servo algorithms includes a focus servo algorithm. In some embodiments, multi-track seek operations or one-track jump operations can also be serviced during the interrupt period.
摘要翻译： 提出了一种在数字信号处理器上执行多个伺服算法的系统。 数字信号处理器接收传感器中断，指示来自光学传感器的数字化数据的可用性，并且响应于该中断来决定服务多个伺服算法中的哪一个。 在一些实施例中，多个伺服算法包括跟踪伺服算法。 在一些实施例中，多个伺服算法包括聚焦伺服算法。 在一些实施例中，也可以在中断周期期间对多轨道寻道操作或单轨道跳跃操作进行维修。
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