利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

174 条记录 (耗时 0.015 秒)

    Fast multiplier circuit employing shift circuitry responsive to two binary numbers the sum of which approximately equals the mantissa of the multiplier
    91.
    发明授权
    Fast multiplier circuit employing shift circuitry responsive to two binary numbers the sum of which approximately equals the mantissa of the multiplier 失效
    快速乘法器电路采用响应两个二进制数的移位电路，其总和近似等于乘数的尾数

    公开(公告)号：US4031377A

    公开(公告)日：1977-06-21

    申请号：US607141

    申请日：1975-08-25

    申请人： Ralph Deutsch ,  Glen R. Griffith

    发明人： Ralph Deutsch ,  Glen R. Griffith

    IPC分类号： G06F7/53 ,  G06F7/487 ,  G06F7/508 ,  G06F7/52 ,  G10H7/10 ,  G06F7/54

    CPC分类号： G06F7/4876 ,  G10H7/105

    摘要： A multiplier for multiplying a fixed point multiplicand by a floating point multiplier utilizes decode logic which provides control signals related to two numbers, the sum of which is approximately equal to the mantissa of the multiplier. The multiplicand is separately left shifted in two circuits, responsive to the control signals, by a number of places respectively corresponding to the values of said two numbers. The shift circuit outputs are summed algebraically in an adder. The sum is then shifted by a number of places and in a direction determined respectively by the magnitude and sign of the power of the floating point multiplier. The result is a close approximation of the desired multiplication product. The multiplier advantageously is employed in an electronic musical instrument.

    摘要翻译： 将固定点被乘数乘以浮点乘数的乘法器利用解码逻辑，其提供与两个数相关的控制信号，其总和近似等于乘数的尾数。 被乘数在两个电路中分别在两个电路中左移，分别对应于所述两个数字的值，响应于控制信号。 移位电路输出在加法器中以代数求和。 然后，该和移动多个位置，并在分别由浮点乘数的幂的大小和符号确定的方向上移动。 结果是期望乘积的近似值。 乘法器有利地用于电子乐器中。

    Electronic musical instrument
    92.
    发明授权
    Electronic musical instrument 失效
    电子乐器

    公开(公告)号：US3992971A

    公开(公告)日：1976-11-23

    申请号：US630861

    申请日：1975-11-11

    申请人： Masanobu Chibana ,  Tsuyoshi Futamase

    发明人： Masanobu Chibana ,  Tsuyoshi Futamase

    IPC分类号： G10H7/08 ,  G10H1/08 ,  G10H7/10 ,  G10F1/00

    CPC分类号： G10H1/08 ,  G10H7/10 ,  G10H2250/161

    摘要： An electronic musical instrument capable of producing a large number of harmonic contents with a small number of calculation circuits. A composite wave consisting of plural harmonics can be mathematically expressed as a multiplication of a factor including an order number of a harmonic and a factor or factors not including an order number of a harmonic. The instrument according to the invention utilizes this principle and produces a composite wave by first obtaining these two kinds of factors individually and thereafter multiplying them together.An example of the invention capable of calculating four harmonics simultaneously and another example capable of calculating two harmonics simultaneously are described.

    摘要翻译： 一种电子乐器，能够以少量的计算电路产生大量的谐波内容。 由多个谐波组成的复合波可以数学地表示为包括谐波的阶数和因子的因子的乘积或不包括谐波的次序数的因子。 根据本发明的仪器利用该原理并通过单独获得这两种因素然后将它们相乘在一起而产生复合波。

    Production of pulse width modulation tonal effects in a computor organ
    93.
    发明授权
    Production of pulse width modulation tonal effects in a computor organ 失效
    在计算机器官中产生脉宽调制色调效应

    公开(公告)号：US3972259A

    公开(公告)日：1976-08-03

    申请号：US509705

    申请日：1974-09-26

    申请人： Ralph Deutsch

    发明人： Ralph Deutsch

    IPC分类号： G10H1/043 ,  G10H7/08 ,  G10H7/10 ,  H03C1/00 ,  H03K7/08 ,  G10H1/02 ,  G10H5/02

    CPC分类号： G10H7/105 ,  G10H2250/141

    摘要： In a computor organ, musical tones are generated by separately evaluating the constituent Fourier components of a musical waveshape and summing these to obtain the waveshape sample point amplitudes. The relative amplitude contribution of each Fourier component is established by a harmonic coefficient. In accordance with the present invention, pulse-type tone generation is simulated by using harmonic coefficient values associated with the frequency spectrum of a pulse train of particular pulse shape. For example, the coefficients may be given by the Fourier transform associated with repetitive pulses.To simulate pulse width modulation effects, a set of such coefficients is stored in a memory, the set having more coefficients than the maximum number of Fourier components included in each amplitude computation. Pulse trains of different pulse width are simulated by utilizing different subsets of the stored coefficients in the amplitude computation. Pulse width modulation tonal effects are achieved by changing the selected subsets as a function of time.

    摘要翻译： 在计算机器官中，通过分别评估音乐波形的组成傅立叶分量并对其进行求和来产生乐音，以获得波形采样点振幅。 每个傅立叶分量的相对幅度贡献由谐波系数确定。 根据本发明，通过使用与特定脉冲形状的脉冲串的频谱相关联的谐波系数值来模拟脉冲型音产生。 例如，可以通过与重复脉冲相关联的傅里叶变换来给出系数。

    Formant filtering in a computor organ
    94.
    发明授权
    Formant filtering in a computor organ 失效
    在计算机器官中进行过滤

    公开(公告)号：US3956960A

    公开(公告)日：1976-05-18

    申请号：US491745

    申请日：1974-07-25

    申请人： Ralph Deutsch

    发明人： Ralph Deutsch

    IPC分类号： G10H1/08 ,  G10H1/12 ,  G10H7/08 ,  G10H7/10 ,  G10H1/00 ,  G10H5/00

    CPC分类号： G10H1/125 ,  G10H7/105 ,  G10H2250/161 ,  G10H2250/481 ,  Y10S84/09

    摘要： Formant filtering is implemented in a computor organ of the type disclosed in U.S. Pat. No. 3,809,786 by eliminating, attenuating or accentuating certain Fourier components included in each waveshape amplitude computation. A set of formant filter factors define the formant filter passband as a function of frequency, logarithmic frequency or Fourier component order. As each constituent Fourier component is independently evaluated, the component amplitude is scaled by the appropriate formant filter factor. The resultant synthesized musical tone includes only Fourier components within the defined passband, so that formant filtering effectively is implemented without the use of an actual filter.

    摘要翻译： 共振峰滤波在美国专利No. 通过消除，衰减或强调每个波形幅度计算中包括的某些傅里叶分量，可以得到3,809,786号。 一组共振峰滤波因子将共振峰滤波器通带定义为频率，对数频率或傅立叶分量阶数的函数。 由于每个构成的傅立叶分量被独立地评估，所以通过适当的共振峰滤波因子来缩放分量幅度。 所得到的合成乐音只包括定义的通带内的傅立叶分量，从而在不使用实际滤波器的情况下有效地实现共振峰滤波。

    Computor organ using parallel processing
    95.
    发明授权
    Computor organ using parallel processing 失效
    使用平行处理的计算机组织

    公开(公告)号：US3809788A

    公开(公告)日：1974-05-07

    申请号：US29836572

    申请日：1972-10-17

    申请人： NIPPON MUSICAL INSTRUMENTS MFG

    发明人： DEUTSCH R

    IPC分类号： G10H7/08 ,  G10H7/10 ,  G10H1/06 ,  G10H5/02

    CPC分类号： G10H7/105

    摘要： Parallel processing is used in a computor organ of the type wherein musical notes are produced by computing at regular time intervals the amplitudes at successive points of a musical waveshape, and converting the amplitudes to tones as the computations are carried out. Each amplitude is evaluated by concurrently calculating in parallel channels different subsets of the Fourier components for the same point, then combining the components to obtain the waveshape amplitude. In a typical embodiment, low order harmonic components are calculated in one channel and high order harmonics in another channel; in another embodiment, odd and even harmonics are calculated in separate, parallel channels. A recirculating shift register, shifted in unison with successive component calculations, advantageously stores the harmonic coefficients used in the amplitude calculations.

    摘要翻译： 在这种类型的计算机器中使用并行处理，其中通过以规则的时间间隔计算音乐波形的连续点处的幅度并且在执行计算时将幅度转换为音调来产生音符。 通过并行计算相同点的傅立叶分量的不同子集，并行计算每个振幅，然后组合分量以获得波形幅度。 在典型的实施例中，在一个通道中计算低阶谐波分量，并在另一个通道中计算高阶谐波; 在另一个实施例中，奇数和偶数谐波在单独的并行通道中计算。 与连续分量计算一致移位的循环移位寄存器有利地存储在振幅计算中使用的谐波系数。

    Signal processing apparatus
    96.
    发明授权
    Signal processing apparatus 有权

    公开(公告)号：US10339907B2

    公开(公告)日：2019-07-02

    申请号：US15876406

    申请日：2018-01-22

    申请人： CASIO COMPUTER CO., LTD.

    发明人： Masuo Yokota

    IPC分类号： G10H7/00 ,  G10H7/10 ,  G10H7/12 ,  G10H1/043 ,  H03H17/02 ,  H03H17/06 ,  G10H1/12

    摘要： A signal processing apparatus has a first memory in which plural pieces of FIR coefficient data used for implementing an FIR filter algorithm are stored, a second memory which stores plural pieces of input data to be subjected to the FIR filter algorithm, and a processor implements the FIR filter algorithm using the plural pieces of FIR coefficient data stored in the first memory and the plural pieces of input data stored in the second memory as many times as the number corresponding to a designated filter order, in which filter algorithm each piece of coefficient data and each piece of input data are multiplied together and resultant products are summed up. The signal processing apparatus is provided, which can implement plural sorts of FIR filter algorithms of filter order which can be changed flexibly.

    Method for the synthetic generation of a digital audio signal
    99.
    发明授权
    Method for the synthetic generation of a digital audio signal 有权

    公开(公告)号：US09741329B2

    公开(公告)日：2017-08-22

    申请号：US15117898

    申请日：2015-02-09

    申请人： JoboMusic AG

    发明人： Johannes Bochmann

    IPC分类号： G10H7/00 ,  G10H7/10 ,  G10H7/08 ,  G10H1/04 ,  G10H7/02

    CPC分类号： G10H7/10 ,  G10H1/04 ,  G10H7/02 ,  G10H7/08 ,  G10H2250/205 ,  G10H2250/565

    摘要： A method for the synthetic generation of a digital audio signal by means of periodic sampling of a waveform shall permit the user a particularly simple and intuitive access to the changing and creative transformation of the waveform on which the sampling is based. For this purpose, according to the invention, the waveform is specified by using control points, which, in addition to position parameters, may contain further attributes, of which the parameters and attributes can be changed individually over time by means of control signals or spontaneouseous intervention. The control-point values which result in this way can be interpreted either as direct amplitude-period phase or as magnitude-frequency or phase-frequency pairs. A continuous waveform is generated by interpolation or approximation of the control points and the parameters/attributes of the latter, which assume a time-specific value depending on the current control signals and other influences, and is used for further processing, e.g. spectral band limiting.