会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 36. 发明申请
    • Information reproducing apparatus
    • 信息重放装置
    • US20070115785A1
    • 2007-05-24
    • US11602300
    • 2006-11-21
    • Tetsuya Shihara
    • Tetsuya Shihara
    • G11B20/10
    • G11B20/10009G11B20/10055G11B2220/2541
    • An information reproducing apparatus comprises an optical head that reads the lengths and arrangement of recording marks recorded on an optical disc and outputs RF signals, a PRML decoder that decodes binary data based on the RF signals output from the optical head, a short mark asymmetry measuring unit that measures an asymmetry in an RF signal of the RF signals output from the optical head that corresponds to a 2T mark or shortest recording mark, and an RF signal offset unit that offsets the RF signals so as to remove the asymmetry in the RF signal corresponding to the 2T mark based on the measurement by the short mark asymmetry measuring unit. The PRML decoder decodes the binary data based on the RF signals offset by the RF signal offset unit. The information reproducing apparatus can provide improved performance in reproduction of information recorded on an optical disc.
    • 一种信息再现装置,包括读取记录在光盘上的记录标记的长度和布置并输出RF信号的光学头,基于从光学头输出的RF信号解码二进制数据的PRML解码器,短标记不对称测量 测量从对应于2T标记或最短记录标记的光学头输出的RF信号的RF信号的不对称性的单元,以及抵消RF信号的RF信号偏移单元,以消除RF中的不对称性 基于短标记不对称测量单元的测量,对应于2T标记的信号。 PRML解码器基于由RF信号偏移单元偏移的RF信号来解码二进制数据。 信息再现装置可以在记录在光盘上的信息的再现中提供改进的性能。
    • 37. 发明授权
    • Optical disc drive for controlling laser emission
    • 用于控制激光发射的光盘驱动器
    • US07177253B2
    • 2007-02-13
    • US10524896
    • 2003-10-06
    • Hiromichi IshibashiTetsuya ShiharaHisashi SengaToshio Matsumoto
    • Hiromichi IshibashiTetsuya ShiharaHisashi SengaToshio Matsumoto
    • G11B7/00
    • G11B7/126
    • In an optical disc drive, a laser light source emits a laser beam having an intensity changeable with the amount of drive current supplied. A first photodetector receives the laser beam reflected from an optical disc, thereby generating a readout signal. A second photodetector receives the laser beam, generates an electric signal representing the power of the laser beam received, and outputs the electric signal as a light quantity detection signal. A feedback control loop compares the level of the light quantity detection signal with a predetermined target value and regulates the drive current such that the level of the light quantity detection signal approaches the target value. In reading data from the optical disc, the target value is changed so as to compensate for a variation of the sensitivity of the second photodetector, thereby controlling the power of the laser beam emitted from the laser light source.
    • 在光盘驱动器中,激光光源发射具有随供给的驱动电流量而变化的强度的激光束。 第一光电检测器接收从光盘反射的激光束,从而产生读出信号。 第二光电检测器接收激光束,产生表示所接收的激光束的功率的电信号,并将该电信号作为光量检测信号输出。 反馈控制环路将光量检测信号的电平与预定目标值进行比较,并且调节驱动电流,使得光量检测信号的电平接近目标值。 在从光盘读取数据时,改变目标值以补偿第二光电检测器的灵敏度的变化,从而控制从激光光源发射的激光束的功率。
    • 39. 发明授权
    • Optical disk apparatus with address polarity determination and confirmation
    • 具有地址极性确定和确认的光盘设备
    • US06381201B1
    • 2002-04-30
    • US09427650
    • 1999-10-27
    • Tetsuya ShiharaKatsuya WatanabeNaohiro KimuraHidemi Takahashi
    • Tetsuya ShiharaKatsuya WatanabeNaohiro KimuraHidemi Takahashi
    • G11B1722
    • G11B7/005G11B7/00718G11B7/00745G11B7/0901
    • An optical disk apparatus of the present invention includes: a light amount detection section for irradiating an information carrier with a light beam so as to detect information recorded in a data section of the information carrier, wherein the information carrier includes the data section and an address section associated with the data section, the data section is an information track formed by a land or a groove where information can be recorded or reproduced, and the address section contains address information corresponding to the information track which is recorded in the address section by one or more concave or convex pit offset by a predetermined distance from a center of the information track; an address polarity determination section for determining whether the address section over which the light beam has passed is either on an outer periphery side or on an inner periphery side with respect to the center of the information track being scanned by the light beam, based on a signal output from the light amount detection section; an address reproduction section for reproducing the address information recorded in the address section based on a signal output from the light amount detection section; and an address confirmation section for confirming the data section from which or to which data is to be reproduced or recorded, based on the determination result from the address polarity determination section and the address information reproduced by the address reproduction section.
    • 本发明的光盘装置包括:光量检测部分,用于利用光束照射信息载体,以便检测记录在信息载体的数据部分中的信息,其中信息载体包括数据部分和地址 与数据部分相关联的部分,数据部分是由可以记录或再现信息的岸台或凹槽形成的信息轨迹,并且地址部分包含与记录在地址段中的信息轨道相对应的地址信息 或更多的凹坑或凸坑偏移距离信息轨道的中心预定距离; 地址极性确定部分,用于确定光束已经通过的地址部分是否相对于由光束被扫描的信息光道的中心的外周侧或内周侧,基于 信号从光量检测部输出; 地址再现部分,用于基于从光量检测部分输出的信号再现记录在地址部分中的地址信息; 以及地址确认部分,用于基于地址极性确定部分的确定结果和由地址再现部分再现的地址信息来确认要从哪个或哪些数据被再现或记录的数据部分。