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    • 31. 发明申请
    • Training method for recording medium reproduction equalizer and recording medium reproduction apparatus
    • 用于记录媒体再现均衡器和记录介质再现装置的训练方法
    • US20050099907A1
    • 2005-05-12
    • US10722915
    • 2003-11-26
    • Masaru SawadaMotomu TakatsuTakao Sugawara
    • Masaru SawadaMotomu TakatsuTakao Sugawara
    • G11B20/10G11B7/00H03H17/02H03H21/00
    • G11B20/10046G11B20/10009G11B20/10481
    • In a training operation for optimizing a multiplication coefficient for each tap of an FIR equalizer equalizing a read signal read from a recording medium, as a restricted coefficient updating vector applied for updating the multiplication coefficient for each tap of the FIR filter, a vector is utilized which is obtained by projecting, onto a plane perpendicular to a predetermined restricting conditional vector, a coefficient updating vector determined based on an equalizer error between the output of the FIR equalizer and a reproduction output determined therefrom and a delayed input value for each tap of the FIR equalizer. As the restricting conditional vector, a vector is utilized which is a difference between a subsequent coefficient vector obtained in the same condition immediately subsequent to and an antecedent coefficient vector obtained in the same condition immediately antecedent to a reference coefficient comprising the multiplication coefficient for the equalizer obtained upon calculating the equalizer error.
    • 在用于优化均衡从记录介质读取的读取信号的FIR均衡器的每个抽头的乘法系数的训练操作中,作为用于更新FIR滤波器的每个抽头的乘法系数的受限系数更新向量,使用向量 其通过将垂直于预定的限制条件向量的平面投影到基于FIR均衡器的输出与由其确定的再现输出之间的均衡器误差确定的系数更新向量和每个抽头的每个抽头的延迟输入值而获得 FIR均衡器 作为限制条件向量,使用作为在紧随其后的相同条件下获得的后续系数向量与在与包括均衡器的乘法系数的参考系数紧密相关的条件下获得的先前系数向量之间的差的向量 在计算均衡器误差时获得。
    • 34. 发明授权
    • Asymmetrical signal detector and signal regenerating apparatus using the
same detector
    • 不对称信号检测器和使用相同检测器的信号再生装置
    • US5790335A
    • 1998-08-04
    • US588999
    • 1996-01-19
    • Takao SugawaraTakenori Ohshima
    • Takao SugawaraTakenori Ohshima
    • G11B5/09G11B5/02G11B5/035G11B20/22H03K5/08H04L25/06
    • G11B5/02G11B20/22H03K5/082G11B5/09
    • Disclosed are an asymmetrical signal detector for detecting an asymmetrical quantity of an asymmetrical signal and a signal regenerating apparatus using this detector. This detector includes a first delaying element for delaying the input signal, a first subtracting element for subtracting an output of the first delaying element from the input signal, a second delaying element for delaying an output of the first subtracting element, an adding element for adding an output of the second delaying element to an output of the first subtracting element, a gate signal generating element for generating a gate signal by comparing an output of the adding element with a predetermined threshold value, a second subtracting element for subtracting the output of the subtracting element from the input signal and a selecting element for selecting an output of the second subtracting element in accordance with the gate signal, thereby obtaining an offset quantity. And this detector further includes a third subtracting element for subtracting an output of the second delaying element from an output of the first subtracting element and a selecting element for selecting an output of the third subtracting element in accordance with the gate signal, thereby obtaining between-positive-negative amplitude error quantity.
    • 公开了一种用于检测不对称信号的不对称量的不对称信号检测器和使用该检测器的信号再生装置。 该检测器包括用于延迟输入信号的第一延迟元件,用于从输入信号中减去第一延迟元件的输出的第一减法元件,用于延迟第一减法元件的输出的第二延迟元件,用于添加的加法元件 第二延迟元件的输出到第一减法元件的输出;栅极信号产生元件,用于通过将加法元件的输出与预定阈值进行比较来产生栅极信号;第二减法元件,用于减去第 从输入信号中减去元件;以及选择元件,用于根据门信号选择第二减法元件的输出,从而获得偏移量。 该检测器还包括:第三减法器,用于从第一减法元件的输出中减去第二延迟元件的输出;以及选择元件,用于根据门信号选择第三减法元件的输出, 正负幅度误差量。
    • 35. 发明授权
    • Alternative display state medical photographic instrument
    • 替代显示状态医疗摄影仪器
    • US5768465A
    • 1998-06-16
    • US365358
    • 1994-12-28
    • Takao SugawaraHiroaki OkadaYutaka Yoneda
    • Takao SugawaraHiroaki OkadaYutaka Yoneda
    • A61B3/10A61B3/12A61B3/14H04N1/00H04N5/235H04N5/77H04N5/76H04N7/18
    • H04N1/00286A61B3/14H04N5/2354H04N5/77A61B3/12
    • A medical photographic instrument includes a medical photographic portion and an electronic image recording portion. The medical photographic portion includes a monitor for displaying an observation image for alignment and a record image recorded in the electronic image recording portion and a display selecting circuit for making an alternate change between the observation image and the record image displayed on the monitor. The electronic image recording portion includes an operation changing circuit for making an alternate change between a recordable state and an image recording state according to a signal output by the medical photographic portion and a strobe synchronous circuit for outputting a strobe synchronizing signal according to which a strobe emits a flash of light when the recordable state is changed to the image recording state. The display selecting circuit makes an alternate change between the state in which the observation image is displayed and the state in which the record image is displayed in accordance with the signal output by the medical photographic portion.
    • 医疗照相器具包括医疗照相部分和电子图像记录部分。 医疗照相部分包括用于显示用于对准的观察图像和记录在电子图像记录部分中的记录图像的监视器和用于在监视器上显示的观察图像和记录图像之间进行交替变化的显示选择电路。 电子图像记录部分包括用于根据医学摄影部分输出的信号进行可记录状态和图像记录状态之间的交替变化的操作改变电路和用于输出选通同步信号的选通同步电路,根据该选通脉冲同步信号, 当可记录状态改变为图像记录状态时,发出闪光。 显示选择电路根据由医疗摄影部输出的信号,在显示观察图像的状态和记录图像的显示状态之间进行交替变化。