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    • 61. 发明申请
    • DIGITAL CONTENT PROTECTION SYSTEM
    • 数字内容保护系统
    • US20080263367A1
    • 2008-10-23
    • US11857389
    • 2007-09-18
    • Makoto TATEBAYASHIYutaka NAKAMURAShunji HARADAMasayuki KOZUKA
    • Makoto TATEBAYASHIYutaka NAKAMURAShunji HARADAMasayuki KOZUKA
    • H04L9/06
    • G11B20/00086G06F21/10G06F2221/0797G11B20/00188G11B20/00195G11B20/0021G11B20/00253G11B20/00413G11B20/00507G11B20/00528
    • The media inherent key storing unit 220 prestores an inherent key Ki, the conversion unit 230 generates an encrypted inherent key Ji from the inherent key read from the media inherent key storing unit 220, the random number generating unit 331 generates a random number R1, the encryption unit 252 generates an encrypted random number S1, the decryption unit 333 generates a random number R′1 from the encrypted random number R1, and the mutual authentication control unit 334 compares the random number R′1 with the random number R1 and, if the random number R′1 matches the random number R1, judges that the memory card 200 is an authorized device. If the memory card 200 and the memory card writer have successfully authenticated each other, the memory card writer encrypts a content using a decrypted inherent key. If the memory card 200 and the memory card reader have successfully authenticated each other, the memory card reader decrypts an encrypted content using the decrypted inherent key.
    • 媒体固有密钥存储单元220预先存储固有密钥Ki,转换单元230从从媒体固有密钥存储单元220读取的固有密钥生成加密固有密钥Ji,随机数生成单元331生成随机数R 1, 加密单元252生成加密随机数S 1,解密单元333从加密随机数R 1生成随机数R'1,并且相互认证控制单元334将随机数R'1与随机数R 1,并且如果随机数R'1与随机数R 1匹配,则判断存储卡200是授权装置。 如果存储卡200和存储卡写卡器已成功认证,则存储卡写入器使用解密的固有密钥加密内容。 如果存储卡200和存储卡阅读器已经成功地认证了彼此,则存储卡读卡器使用解密的固有密钥来解密加密的内容。
    • 65. 发明授权
    • Method and device for generating electronic sounds and portable apparatus utilizing such device and method
    • 用于产生电子声音的方法和装置以及利用这种装置和方法的便携式装置
    • US06972362B2
    • 2005-12-06
    • US10338269
    • 2003-01-07
    • Yutaka Nakamura
    • Yutaka Nakamura
    • G08B3/10G10H7/06G10H7/00
    • G08B3/10G10H7/06G10H2230/041
    • An electronic sound generation device is adapted to start arithmetic processing with a start signal. When the arithmetic processing is not completed in a period between two sampling signals of a constant period, a start signal for starting next arithmetic processing signal for the next period is output after the completion of the on-going arithmetic processing. The electronic sound generation device is also adapted to hold resultant data of arithmetic processing, which is output in synchronism with the sampling signal. An address for designating waveform data in a waveform memory is calculated upon the address arithmetic parameters received from a digital signal processor (DSP) having a sum-of-products arithmetic circuit. Using fractional parts of the addresses, the data read out from the waveform memory are interpolated, and supplied to the DSP.
    • 电子声音发生装置适于以开始信号开始运算处理。 当在恒定周期的两个采样信号之间的周期内算术处理没有完成时,在完成正在进行的运算处理之后输出用于下一周期的下一运算处理信号的开始信号。 电子声音产生装置还适于保持与采样信号同步地输出的算术处理的结果数据。 根据从具有产品总和运算电路的数字信号处理器(DSP)接收的地址算术参数,计算波形存储器中用于指定波形数据的地址。 使用地址的小数部分,从波形存储器读出的数据被内插,并提供给DSP。
    • 69. 发明申请
    • Magnetic pattern transfer method
    • 磁图转移法
    • US20050185311A1
    • 2005-08-25
    • US11113137
    • 2005-04-25
    • Yutaka NakamuraHitoshi KomoriyaHiroyuki SuzukiTakao HiraharaArata Ejiri
    • Yutaka NakamuraHitoshi KomoriyaHiroyuki SuzukiTakao HiraharaArata Ejiri
    • G11B5/82G11B5/86
    • G11B5/865G11B5/825G11B5/86
    • A magnetic pattern transfer method is disclosed. A magnetic pattern transfer master having a plurality of magnetic portions preformed with predetermined magnetic patterns is brought in proximity to a magnetic recording medium having a magnetic film to record the magnetic information, and a magnetic field is applied from an external source thereby to transfer the magnetic patterns to the magnetic recording medium. In order to improve the closeness between the magnetic film of the magnetic recording medium and the magnetic portions of the magnetic pattern transfer master, the magnetic patterns are transferred to the magnetic film of the magnetic recording medium during the process of fabricating the magnetic recording medium. Also, using a magnetic pattern transfer master with the width of each pattern groove of the magnetic patterns smaller than the width of a corresponding pattern protrusion, the relative position of the magnetic pattern transfer master is displaced, while at the same time transferring the magnetic patterns to the magnetic film of the magnetic recording medium a plurality of times.
    • 公开了磁图案转印方法。 将具有预定磁性图案预先形成的多个磁性部分的磁性图案转印母版带到具有磁性薄膜的磁记录介质附近以记录磁信息,并且从外部源施加磁场,从而转移磁 图案到磁记录介质。 为了提高磁记录介质的磁性膜与磁性图案转印母版的磁性部分之间的接近度,在制造磁记录介质的过程中将磁图案转印到磁记录介质的磁膜上。 此外,使用具有小于相应图案突起的宽度的磁图案的每个图案槽的宽度的磁性图案转印母版,磁图案转印母版的相对位置被移位,同时转印磁图案 磁记录介质的磁性膜多次。
    • 70. 发明授权
    • Rotary encoder
    • 旋转编码器
    • US06922899B2
    • 2005-08-02
    • US10726639
    • 2003-12-04
    • Yutaka NakamuraSatoshi Yanobe
    • Yutaka NakamuraSatoshi Yanobe
    • G01D5/245G01D5/244G01B7/30
    • G01D5/24452G01D5/2449
    • There is provided a rotary encoder which can eliminate an angle error caused by an eccentricity from a measured angle without strictly adjusting hardware and which can also eliminate a graduation error. Detection of a rotation angle of the rotating section and measurement of an error E (θn) included in the detected angle θ are performed in advance, an error function E(θ) represented by a periodic function of the detected angle θ is calculated on the basis of these values, a storing means for storing the periodic function of the calculated error E(θ) is arranged, and an angle obtained by subtracting a value obtained by substituting the detected angle θa for variables in the error function E(θ) from the detected angle θa is displayed on a display unit.
    • 提供了一种旋转编码器,其可以在不严格调整硬件的情况下消除由测量角度引起的偏心度的角度误差,并且还可以消除刻度误差。 包括在检测角度θ中的旋转部分的旋转角度的检测和误差测量值E(θN n N n)预先执行,由以周期函数表示的误差函数E(θ) 基于这些值计算检测角度θ,设置存储计算出的误差E(θ)的周期函数的存储装置,并且将通过将检测到的角度θa代入变量获得的值而获得的角度 来自检测角度θa的误差函数E(θ)被显示在显示单元上。