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    • 1. 发明授权
    • Combination parallel/serial execution of sequential algorithm for data
compression/decompression
    • 组合并行/串行执行数据压缩/解压缩的顺序算法
    • US5384567A
    • 1995-01-24
    • US89211
    • 1993-07-08
    • Martin A. HassnerEhud D. KarninUwe SchwiegelshohnTetsuya Tamura
    • Martin A. HassnerEhud D. KarninUwe SchwiegelshohnTetsuya Tamura
    • G06F5/00G06T9/00H03M7/30H04B1/66
    • H03M7/3086G06T9/005
    • An apparatus and method for executing a sequential data compression algorithm that is especially suitable for use where data compression is required in a device (as distinguished from host) controller. A history buffer compresses an array of i identical horizontal slice units. Each slice unit stores j symbols to define j separate blocks in which the symbols in each slice unit are separated by exactly i symbols. Symbols in a string of i incoming symbols are compared by i comparators in parallel with symbols previously stored in the slice units to identify matching sequences of symbols. A control unit controls execution of the sequential algorithm to condition the comparators to scan symbols in parallel but in each of the blocks sequentially and cause matching sequences and nonmatching sequences of symbols to be stored in the array. The parameters i and j are selected to limit the number of comparators required to achieve a desired degree of efficiency in executing the algorithm based upon a trade-off of algorithm execution speed versus hardware cost. A priority encoder calculates from signals output by the slice units each j,i address in which a matching sequence is identified, but it outputs the address of only one (such as the smallest) of these addresses.
    • 一种用于执行顺序数据压缩算法的装置和方法,其特别适用于在设备(与主机不同)控制器中需要数据压缩的地方。 历史缓冲区压缩i个相同水平切片单元的阵列。 每个片单元存储j个符号以定义其中每个片单元中的符号被精确地i个符号分隔的j个分离块。 i个输入符号的串中的符号被i个比较器与先前存储在片单元中的符号并行地进行比较,以识别符号的匹配序列。 控制单元控制顺序算法的执行,以使比较器平行扫描符号,但在每个块中顺序扫描符号,并使符号的匹配序列和非匹配序列存储在阵列中。 选择参数i和j以限制在基于算法执行速度与硬件成本的折衷来执行算法时实现期望的效率程度所需的比较器的数量。 优先编码器根据由片单元输出的信号计算每个j,i地址,其中标识匹配序列,但是它输出这些地址中只有一个(例如最小的)的地址。
    • 2. 发明授权
    • Maximum-likelihood symbol detection for RLL-coded data
    • RLL编码数据的最大似然符号检测
    • US5638065A
    • 1997-06-10
    • US489863
    • 1995-06-13
    • Martin A. HassnerTetsuya TamuraShmuel Winograd
    • Martin A. HassnerTetsuya TamuraShmuel Winograd
    • G11B20/10G11B20/14G11B20/18H03M7/00
    • G11B20/1426G11B20/10009
    • Parallel ML processing of an analog signal in a RLL-coded channel in which (1) vectors for a current state of the channel and the next state of the channel are computed using Walsh transform vector coefficients of the analog signal; (2) current state vectors and next state vectors and values of vectors precomputed in analog matched filters are used to generate vector scalar products which are compared against preselected threshold values for generating binary decision outputs that are used in digital sequential finite state machines to generate ML symbol decisions; and (3) ML symbol decisions are fed back and used to subtract the intersymbol interference value of the current state vector from the vector of the next state to transform the next state vector into an updated current state vector.
    • RLL编码信道中的模拟信号的并行ML处理,其中(1)信道的当前状态的向量和信道的下一状态的矢量使用模拟信号的沃尔什变换矢量系数来计算; (2)当前状态矢量和下一状态向量以及在模拟匹配滤波器中预先计算的矢量值用于产生与预选阈值进行比较的矢量标量积,用于产生在数字顺序有限状态机中使用的二进制判决输出以产生ML 符号决定 (3)ML符号决定被反馈并用于从下一状态的向量中减去当前状态向量的符号间干扰值,以将下一状态向量变换为更新的当前状态向量。
    • 5. 发明授权
    • Sheet material transport apparatus and recording apparatus
    • 片材输送装置和记录装置
    • US08172217B2
    • 2012-05-08
    • US13015489
    • 2011-01-27
    • Tetsuya TamuraAkira NemuraHiroki Chino
    • Tetsuya TamuraAkira NemuraHiroki Chino
    • B65H5/00B65H5/22
    • B65H5/06
    • A sheet material transport apparatus includes a second planetary gear engaging with a transmission gear and providing planetary motion around the transmission gear. The second planetary gear is in a second separated position not capable of engaging with a first planetary gear during forward-direction rotation. The transmission gear engages with the first planetary gear and rotates in a direction that causes a second transport roller to rotate in the forward rotation direction, and positioned to engage with the first planetary gear that is positioned in a first engaging position during reverse rotation. A load is placed on the transmission gear by the second transport roller. The transmission gear rotates in the opposite direction to the forward-direction rotation. The second planetary gear applies a force on the first planetary gear in the direction that separates the first planetary gear from the transmission gear due to rotation.
    • 片材输送装置包括与传动齿轮啮合的第二行星齿轮,并且围绕传动齿轮提供行星运动。 第二行星齿轮在向前旋转期间不能与第一行星齿轮接合的第二分离位置。 传动齿轮与第一行星齿轮接合并沿着使第二输送辊沿正转方向旋转的方向旋转,并且定位成与反向旋转期间位于第一接合位置的第一行星齿轮接合。 通过第二传送辊将负载放置在传动齿轮上。 传动齿轮沿与正向旋转相反的方向旋转。 第二行星齿轮由于旋转而使第一行星齿轮沿着使第一行星齿轮与变速齿轮分离的方向施加力。
    • 7. 发明申请
    • DATA STORAGE APPARATUS AND DATA ACCESS METHOD
    • 数据存储设备和数据访问方法
    • US20080046646A1
    • 2008-02-21
    • US11687969
    • 2007-03-19
    • Tetsuya TamuraHajime NishimuraTakeshi SasaKazuya Suzuki
    • Tetsuya TamuraHajime NishimuraTakeshi SasaKazuya Suzuki
    • G06F12/00
    • G06F3/0644G06F3/0608G06F3/0679
    • A data storage apparatus is provided. The data storage apparatus includes: a storage unit managed using a logical block address; a memory; a storage control unit for storing in the storage unit a free area control table transmitted from the host apparatus in which information on a free area in the storage unit is stored; an expanding unit for reading the free area control table in the storage unit and expanding it in the memory; a recording unit for recording data transmitted from the host apparatus into a free area in the storage unit on the basis of the free area control table in the memory; an updating unit for updating the free area control table in the memory after the data recording unit has completed a recording operation; and a transmission unit for transmitting to the host apparatus updated information included in the free area control table which has been updated by the updating unit.
    • 提供数据存储装置。 数据存储装置包括:使用逻辑块地址管理的存储单元; 记忆 存储控制单元,用于在存储单元中存储从其中存储有关于存储单元中的空闲区域的信息的主机设备发送的空闲区域控制表; 扩展单元,用于读取存储单元中的空闲区域控制表并将其扩展到存储器中; 记录单元,用于根据存储器中的空闲区域控制表将从主机设备发送的数据记录到存储单元中的空闲区域中; 更新单元,用于在数据记录单元完成记录操作之后更新存储器中的空闲区域控制表; 以及发送单元,用于向所述主机发送包括在由所述更新单元更新的所述空闲区域控制表中的更新信息。
    • 8. 发明申请
    • COMPOSITE TYPE RECORDING APPARATUS, DATA WRITING METHOD AND DATA WRITING PROGRAM
    • 复合类型记录装置,数据写入方法和数据写入程序
    • US20070050583A1
    • 2007-03-01
    • US11459107
    • 2006-07-21
    • Hajime NishimuraTakeshi SasaTetsuya TamuraKazuya Suzuki
    • Hajime NishimuraTakeshi SasaTetsuya TamuraKazuya Suzuki
    • G06F12/14G06F12/00
    • G06F3/0643G06F3/0626G06F3/068
    • There is provided a composite type recording apparatus restricting write operations depending on the type of a connected host apparatus, including a recording medium having a first data region, a non-volatile storage medium having a second data region and an identification information table for integrating and managing the first and second data region, an information selection section for selecting positional information having predetermined identification information from the identification information table according to the type of the host apparatus, a conversion section for converting positional information selected by the information selection section into positional information matching the first data region or positional information matching the second data region, a first write section for writing data supplied from the host apparatus in the first data region according to conversion process of the conversion section and a second write section for writing data supplied from the host apparatus in the second data region.
    • 提供一种复合型记录装置,其根据所连接的主机装置的类型限制写入操作,包括具有第一数据区域的记录介质,具有第二数据区域的非易失性存储介质和用于集成的识别信息表, 管理第一和第二数据区域的信息选择部分,用于根据主机设备的类型从识别信息表中选择具有预定标识信息的位置信息的信息选择部分,用于将由信息选择部分选择的位置信息转换成位置信息的转换部分 匹配第一数据区域或与第二数据区域匹配的位置信息,第一写入部分,用于根据转换部分的转换处理将从主机设备提供的数据写入第一数据区域;以及第二写部分,用于写入从 主机设备在第二数据区域中。
    • 10. 发明授权
    • Apparatus and method to compute in Jacobian of hyperelliptic curve defined over Galois field of characteristic 2
    • 在特征2的伽罗瓦域定义的超椭圆曲线的雅可比计算装置和方法
    • US07003537B1
    • 2006-02-21
    • US09481847
    • 2000-01-14
    • Tetsuya Tamura
    • Tetsuya Tamura
    • G06F7/00
    • G06F7/724
    • To implement an operation in Jacobian with improved computation complexity, the sum is computed of a divisor D1=g.c.d. (a1(x),y−b1(x)) and a divisor D2=g.c.d. (a2(x),y−b2(x)) on Jacobian of a hyperelliptic curve y2+y=f(x) defined over GF(2n) by: storing a1(x), a2(x), b1(x) and b2(x); and calculating q(x)=s1(b1(x)+b2(x)) mod a2(x) by using s1(x) in s1(x)a1(x)+s2(x)a2(x)=1 in case of GCD(a1(x),a2(x))=1 where GCD denotes a greatest common polynomial. Thus, a new function q(x) is provided so as to reduce the entire computational complexity and the hardware size. Moreover, in the case of D1=D2, a1(x) and b1(x) is stored; and q(x)=Q(b12(x)+f(x) mod a12(x), a1(x)) where Q(A,B) is a quotient of A/B is calculated.
    • 为了在Jacobian中实现具有改进的计算复杂度的操作,求和除数D <1> = g.c.d。 (x),y​​-b 1(x))和除数D 2 N = g.c.d。 (x),y​​b 2(x))对于超椭圆曲线y 2 2 + y = f(x)的雅可比 通过以下方式:通过以下方式存储GF(2):存储第一个(x),第二个(x),第二个1 / (x)和b <2(x); 并且计算q(x)= s 1(b 1(x)+ b 2(x))mod a < (x)中的第一个(x),(x)中的第一个(x) 在GCD(a <1> 1(x)),(2)(2)的情况下,2(x)a <2>(x)= 1 x))= 1其中GCD表示最大的公共多项式。 因此,提供了新的函数q(x),以便减少整个计算复杂度和硬件尺寸。 此外,在D 1> D 2 2的情况下,第1(1)(x)和(b)(x(x) )存储; 并且q(x)= Q(b&lt; 2&gt; 2(x)+ f(x)mod 1&lt; 2&gt; 其中Q(A,B)是A / B的商,其中,(x),a(1)(x)