公开(公告)号：EP0973102A3

公开(公告)日：2000-05-17

申请号：EP99121067.5

申请日：1994-09-22

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： G06F17/15 ,  H03H17/02

CPC分类号： G06F17/15

摘要： A correlation detector capable of obtaining a more correct and natural correlation value. The correlation detector outputs a correlation value representative of autocorrelation in accordance with a sum (r + ra) of the number r of consecutive autocorrelated data items before one timing and the number ra of consecutive autocorrelated data items after the one timing.

摘要翻译： 相关检测器能够获得更加正确和自然的相关值。 相关检测器根据一个定时之前的连续自相关数据项的数目r的总和（r + ra）和该一个定时之后的连续自相关数据项的数量ra，输出表示自相关的相关值。

公开(公告)号：EP0598374B1

公开(公告)日：1998-02-25

申请号：EP93118449.3

申请日：1993-11-15

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： H03H17/06

CPC分类号： H03H17/0621

公开(公告)号：EP0619649A1

公开(公告)日：1994-10-12

申请号：EP94105392.8

申请日：1994-04-07

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： H03H17/02

CPC分类号： H03H17/0294

摘要： A digital filter capable of reducing the number of data read times and reducing output distortions. A correlation between input data sampled at a frequency f s is detected by a correlation detector. The input data is written in a memory. First data delayed by [natural number m - (tap number Ni - 1 )/2] clocks from the input data and second data delayed by [natural number m + (tap number Ni - 1)/2 + 1] clocks from the input data are read from the memory. The second data is multiplied by 0 during an Ni clock time and by - 1 after the Ni clock time by multipliers. The first data and the outputs of the multipliers are accumulatively added together by accumulative adders. The outputs of the accumulative adders are multiplied by 1/Ni by multipliers, and one of the outputs is selected as an output of the digital filter by a selector in accordance with a correlation output detected from input data.

摘要翻译： 数字滤波器，能够减少数据读取时间并减少输出失真。 通过相关检测器检测以频率fs采样的输入数据之间的相关性。 输入数据写入存储器。 从输入数据延迟了[自然数m - （抽头数Ni-1）/ 2]时钟的第一数据和从输入延迟了[自然数m +（抽头数Ni-1）/ 2 + 1]时钟的第二数据 从存储器中读取数据。 在Ni时钟时间期间，第二个数据乘以0，在Ni时钟之后由乘法器乘以-1。 乘法器的第一个数据和输出由累加器累加到一起。 累积加法器的输出通过乘法器乘以1 / Ni，并且根据从输入数据检测到的相关输出，通过选择器将输出中的一个选择为数字滤波器的输出。

公开(公告)号：EP0973102A2

公开(公告)日：2000-01-19

申请号：EP99121067.5

申请日：1994-09-22

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： G06F17/15

CPC分类号： G06F17/15

摘要： A correlation detector capable of obtaining a more correct and natural correlation value. The correlation detector outputs a correlation value representative of autocorrelation in accordance with a sum (r + ra) of the number r of consecutive autocorrelated data items before one timing and the number ra of consecutive autocorrelated data items after the one timing.

摘要翻译： 相关检测器，能够获得更正确和自然的相关值。 相关检测器根据在一个定时之前的连续自相关数据项的数r和在一个定时之后的连续自相关数据项的数量ra之和（r + ra）输出表示自相关的相关值。

公开(公告)号：EP0598374A2

公开(公告)日：1994-05-25

申请号：EP93118449.3

申请日：1993-11-15

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： H03H17/06

CPC分类号： H03H17/0621

摘要： A sampling frequency converter capable of obtaining data sampled by sampled pulses having a sampling frequency of 2-, 4-, or 8-fold of 44.1 kHz without using an over-sampling filter. Input data sampled by sampling pulses having a sampling frequency of 32 kHz is over-sampled by a 3-fold by a first over-sampling filter, and down-sampled by a one-half-fold by a first down-sampling filter. One of input data sampled by sampling pulses having a sampling frequency of 48 kHz and the output of the first down-sampling filter is selected by a first selector. The output of the selector is over-sampled by a 147-fold by a second over-sampling filter, and down-sampled by a one-20th-fold by a second down-sampling filter. The output of the second down-sampling filter is down-sampled by one-half-, one-4th-, and one-8th-folds respectively by third, fourth, and fifth down-sampling filters. One of the outputs of the second to fifth down-sampling filters is selected by a second selector.

摘要翻译： 采样频率转换器，其能够获得采样频率为44.1kHz的2倍，4倍或8倍的采样脉冲采样的数据，而不使用过采样滤波器。 通过采样频率为32kHz的采样脉冲采样的输入数据由第一过采样滤波器（6）进行3倍的过采样，并通过第一次采样滤波器向下采样二分之一倍 （2）过滤器。 由采样频率为48kHz的采样脉冲和第一下采样滤波器的输出采样的输入数据之一由第一选择器（3）选择。 选择器的输出被147倍的第二过采样滤波器（4）过采样，并由第二下采样滤波器（5）下采样一20倍。 第二个下采样滤波器的输出分别通过第三（6），第四（7）和第五（8）下采样的二分之一，四分之一和八分之一下降采样 过滤器。 第二至第五下采样滤波器的输出之一由第二选择器（9）选择。

公开(公告)号：EP0645719B1

公开(公告)日：2001-05-23

申请号：EP94114960.1

申请日：1994-09-22

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： G06F17/15 ,  G06F17/18

CPC分类号： G06F17/15

公开(公告)号：EP0619649B1

公开(公告)日：1998-07-29

申请号：EP94105392.8

申请日：1994-04-07

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： H03H17/02

CPC分类号： H03H17/0294

公开(公告)号：EP0645719A1

公开(公告)日：1995-03-29

申请号：EP94114960.1

申请日：1994-09-22

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： G06F17/15

CPC分类号： G06F17/15

摘要： A correlation detector capable of obtaining a more correct and natural correlation value. The correlation detector outputs a correlation value representative of autocorrelation in accordance with a sum (r + ra) of the number r of consecutive autocorrelated data items before one timing and the number ra of consecutive autocorrelated data items after the one timing.

摘要翻译： 相关检测器，能够获得更正确和自然的相关值。 相关检测器根据在一个定时之前的连续自相关数据项的数r和在一个定时之后的连续自相关数据项的数量ra之和（r + ra）输出表示自相关的相关值。

公开(公告)号：EP0588352A1

公开(公告)日：1994-03-23

申请号：EP93114952.0

申请日：1993-09-16

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio

IPC分类号： H03H17/06

CPC分类号： H03H17/0685

摘要： A sampling frequency converter of a compact size for converting input data sampled at a sampling frequency of M = F * m₁ * m₂,..., * m k * m k+1 (m₁, m₂,..., m k , m k+1 are positive integers) into data sampled at a sampling frequency of N = F * n₁ * n₂,..., * n k (n₁, n₂,..., n k are positive integers). The converter includes a serial circuit of cascaded n stages of over-sampling filters Vi for over-sampling the input data by an n₁-fold (i = 1, 2,..., k) and down-sampling filters Wi for down-sampling the outputs of the over-sampling filters by an m i -fold, and a down-sampling filter W k+1 for down-sampling an output of the down-sampling filter at the stage k by an m k+1 -fold.

摘要翻译： 用于转换以采样频率M = F * m 1 * m 2，...，* mk * mk + 1（m 1，m 2，...，mk，mk + 1）采样的输入数据的紧凑尺寸的采样频率变换器 是正整数）转换成采样频率为N = F * n 1 * n 2，...，* nk（n 1，n 2，...，nk为正整数）的数据。 该转换器包括级联n级串联电路的过采样滤波器Vi，用于将输入数据过采样n 1倍（i = 1,2，...，k），下采样滤波器Wi用于下采样， 对过采样滤波器的输出采样一倍数;以及下采样滤波器Wk + 1，用于在阶段k将下采样滤波器的输出下采样mk + 1倍。

公开(公告)号：EP0557974A1

公开(公告)日：1993-09-01

申请号：EP93102889.8

申请日：1993-02-24

申请人： KABUSHIKI KAISHA KENWOOD

发明人： Iwata, Toshio ,  Nishida, Toshiaki, A muru Tamagawagakuen B-105, ,  Tsumura, Tsuyoshi, 1-15-22 Kyo-Machi

IPC分类号： H03H17/06

CPC分类号： H03H17/0685 ,  H03H17/0225

摘要： A sampling frequency converter capable of performing an operation of multiplications and additions at a lower speed and realizing with a small amount of hardware. The sampling frequency converter for converting input data sampled at a sampling frequency M into data sampled at sampling frequency N, includes: a non-cyclic digital filer including a memory (3) for sequentially putting and storing E data elements in response to clocks of the sampling frequency M, and reading the stored E data elements in parallel and in response to each clock of the sampling frequency M, a plurality of coefficient multipliers (K₀,K₁,...K₄₉) for selecting E coefficients in response to each clock of the sampling frequency N, the E coefficients being extracted from (J * E/M) coefficients every (J/M)-th where J is the least common denominator of M and N, and multiplying each data element read from the memory by a corresponding one of the selected coefficients, and an adder (A₂) for adding the multiplication results by the coefficient multipliers together; and a sampler (S₂) for sampling an output of the non-cyclic digital filter at the sampling frequency N.

摘要翻译： 一种采样频率转换器，能够以较低的速度进行乘法运算和实现少量的硬件。 用于将以采样频率M采样的输入数据转换为以采样频率N采样的数据的采样频率转换器包括：非循环数字滤波器，包括：存储器（3），用于响应于时钟 采样频率M，并且并行地响应于采样频率M的每个时钟读取所存储的E个数据元素，用于响应于每个时钟的选择E系数的多个系数乘法器（K0，K1，... K49） 采样频率N，从（J * E / M）系数提取的每个（J * E / M）系数的E系数，其中J是M和N的最小公分母，并且将从存储器读取的每个数据元素乘以 所选择的系数中的一个对应的一个;以及用于将乘法运算结果乘以一起的加法器（A2） 以及用于以采样频率N对非循环数字滤波器的输出进行采样的采样器（S2）