公开(公告)号：US11764803B2

公开(公告)日：2023-09-19

申请号：US17706012

申请日：2022-03-28

申请人： CASIO COMPUTER CO., LTD.

发明人： Goro Sakata

IPC分类号： H03M3/00 ,  G10H1/34 ,  G10H7/08

CPC分类号： H03M3/506 ,  G10H1/344 ,  G10H7/08 ,  H03M3/42

摘要： A digital-to-analog conversion device which performs integration processing for integrating a difference between an input signal and a first return signal generated based on the input signal, and outputting an integration result, first quantization processing for quantizing the integration result, and outputting a first quantization signal, first return signal output processing for outputting the first return signal by adding to the first quantization signal a correction value delay signal acquired by a correction value signal outputted based on the integration result being delayed, and output processing for outputting output signals including a signal whose pulse width is asymmetrical to center of a processing period, based on the first quantization signal, in which the correction value signal includes a signal indicating a correction value for correcting a difference between a center of the pulse width asymmetrical to the center of the processing period and the center of the processing period.

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.

公开(公告)号：US07427711B2

公开(公告)日：2008-09-23

申请号：US11205824

申请日：2005-08-17

申请人： Maura Sile O'Modhrain ,  Georg Essl

发明人： Maura Sile O'Modhrain ,  Georg Essl

IPC分类号： G10D13/08

CPC分类号： G10H7/08 ,  G10H1/0008 ,  G10H2220/326 ,  G10H2250/395 ,  G10H2250/471

摘要： Methods and apparatus for manipulating physical objects to produce sounds that are correlated with the feel of the objects being manipulated. Example devices called the PebbleBox, CrumbleBag and ScrubberGlove each use the manipulation of physical objects of arbitrary material as the basis for interacting with granular sound synthesis models. The sounds made by the objects as they are manipulated produce sound signal events that are detected and used to trigger and control the reproduction of stored sound samples in real time.

摘要翻译： 用于操纵物体以产生与被操纵的物体的感觉相关的声音的方法和装置。 称为PebbleBox，CrumbleBag和ScrubberGlove的示例设备都使用任意材质的物理对象的操纵作为与粒子声合成模型进行交互的基础。 被处理物体产生的声音产生的声音信号事件被检测并用于实时触发和控制存储的声音样本的再现。

公开(公告)号：US20060112811A1

公开(公告)日：2006-06-01

申请号：US10999376

申请日：2004-11-30

申请人： Kabi Padhi ,  Jianhua Sun

发明人： Kabi Padhi ,  Jianhua Sun

IPC分类号： G10H7/00

CPC分类号： G10H7/08 ,  G10H2210/066 ,  G10H2230/021 ,  G10H2250/615

摘要： A method includes receiving an audio signal and identifying one or more steady-state segments of the audio signal. The method also includes identifying at least one portion of the one or more segments that contains a specified frequency. Further, the method includes generating a wavetable using the at least one identified portion of the one or more segments. In addition, the method could include synthesizing an output audio signal using the wavetable. The output audio signal could represent a ringtone in a mobile telephone.

公开(公告)号：US5986198A

公开(公告)日：1999-11-16

申请号：US713405

申请日：1996-09-13

申请人： Brian Charles Gibson ,  Christopher Michael Jubien ,  Brian John Roden

发明人： Brian Charles Gibson ,  Christopher Michael Jubien ,  Brian John Roden

IPC分类号： G10H1/043 ,  G10H1/20 ,  G10H3/12 ,  G10H5/00 ,  G10H7/08 ,  G10H7/00

CPC分类号： G10H3/125 ,  G10H1/20 ,  G10H5/005 ,  G10H7/08 ,  G10H2210/066 ,  G10H2240/056 ,  G10H2250/285 ,  G10H2250/631

摘要： A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.

公开(公告)号：US5861568A

公开(公告)日：1999-01-19

申请号：US50153

申请日：1998-03-30

申请人： Eduardo Abreu ,  Jalil Fadavi-Ardekani

发明人： Eduardo Abreu ,  Jalil Fadavi-Ardekani

IPC分类号： G10H1/057 ,  G10H7/08 ,  G10H7/12 ,  G10H1/04 ,  G10H7/00

CPC分类号： G10H7/08 ,  G10H1/057 ,  G10H7/12 ,  G10H2250/555

摘要： An improved method for generating various wave functions for use in musical tone generation in FM synthesis so as to substantially reduce computational and storage requirements. The waveform desired to be used is mathematically modeled using piecewise linear approximation. A reduced number of coefficients of the piecewise linear approximation, representing the angles and offsets of the linear segments, are stored in memory.

摘要翻译： 一种用于产生用于FM合成中的乐音产生的各种波函数以改善计算和存储要求的改进方法。 希望使用的波形使用分段线性近似进行数学建模。 代表线性段的角度和偏移的分段线性近似的系数的减少的数量被存储在存储器中。

公开(公告)号：US5814750A

公开(公告)日：1998-09-29

申请号：US555537

申请日：1995-11-09

申请人： Avery L. Wang ,  Brooks S. Read

发明人： Avery L. Wang ,  Brooks S. Read

IPC分类号： G10H1/12 ,  G10H7/08

CPC分类号： G10H1/125 ,  G10H7/08 ,  G10H2250/111 ,  G10H2250/145 ,  G10H2250/285 ,  G10H2250/291 ,  G10H2250/545 ,  G10H2250/631 ,  Y10S84/09

摘要： A method for resampling includes convolving a given set of samples with the impulse response function of a low-pass filter. In this method, values of the impulse response required for the convolution calculation are computed at the time of resampling from a segmented polynomial approximating the impulse response. In one embodiment, the method is applied to provide musical tones of various pitches from a stored waveform.

摘要翻译： 重采样的方法包括使用低通滤波器的脉冲响应函数来卷积给定的采样集合。 在该方法中，在从接近脉冲响应的分段多项式进行重采样时计算卷积计算所需的脉冲响应的值。 在一个实施例中，该方法被应用于从存储的波形提供各种音调的乐音。

公开(公告)号：US5625158A

公开(公告)日：1997-04-29

申请号：US360208

申请日：1994-12-20

申请人： Tetsuji Ichiki

发明人： Tetsuji Ichiki

IPC分类号： G10H1/02 ,  G10H1/18 ,  G10H7/00 ,  G10H7/02 ,  G10H7/08

CPC分类号： G10H1/187 ,  G10H7/006 ,  G10H7/02 ,  G10H7/08 ,  G10H2250/161 ,  G10H2250/601 ,  G10H2250/621

摘要： A musical tone generating apparatus has an waveform memory which stores original waveform data. One or two tone generating chips are be able to fixed on a print circuit board as elements of the musical tone generating apparatus. Each tone generating chip, provided on the print circuit board, sequentially generates waveform data of a plurality of musical tones at sampling periods having a predetermined length under time division control. Each tone generating chip sequentially carries out tone generating operations to generate the waveform data based on the original waveform data during time division channels which are obtained by dividing each one of the sampling periods when the musical tone generating section is used for tone generation. In the case where one tone generating chip is employed on the print circuit board, N samples of the original waveform data are read out from the waveform memory during each one of the time division channels to be used by the tone generating chip. In the case where two tone generating chips are employed on the print circuit board, the number of the original waveform data read out from the waveform memory for each tone generating chip during each time division channel is decreased from N to M which is less than N.

摘要翻译： 乐音产生装置具有存储原始波形数据的波形存储器。 一个或两个音调生成芯片能够固定在作为乐音产生装置的元件的打印电路板上。 设置在打印电路板上的每个音调生成芯片在时分控制下以具有预定长度的采样周期顺序地产生多个乐音的波形数据。 每个乐音产生芯片依次执行乐音产生操作，以便在通过将乐音产生部分用于音调产生时将采样周期中的每一个获得的时分信道中的原始波形数据生成波形数据。 在印刷电路板上使用一个音调生成芯片的情况下，在由音调生成芯片使用的每个时分信道中，从波形存储器中读出原始波形数据的N个样本。 在印刷电路板上使用两个音调生成芯片的情况下，在每个时分信道期间从每个音调生成芯片的波形存储器读出的原始波形数据的数目从N减小到小于N的M 。

公开(公告)号：US5567901A

公开(公告)日：1996-10-22

申请号：US374110

申请日：1995-01-18

申请人： Brian C. Gibson ,  Christopher M. Jubien ,  Brian J. Roden

发明人： Brian C. Gibson ,  Christopher M. Jubien ,  Brian J. Roden

IPC分类号： G10H1/043 ,  G10H1/20 ,  G10H3/12 ,  G10H5/00 ,  G10H7/08 ,  G10H7/00

CPC分类号： G10H3/125 ,  G10H1/20 ,  G10H5/005 ,  G10H7/08 ,  G10H2210/066 ,  G10H2240/056 ,  G10H2250/285 ,  G10H2250/631

摘要： A method for shifting the timbre and/or pitch of an input signal samples the input signal at a first rate and stores the samples in a memory buffer. A digital signal processor resamples the stored input signal at a rate that differs from the first rate at which the input note is originally sampled and stores the resampled input signal in a second memory buffer. A pitch shifter shifts the pitch of the input signal by periodically scaling the resampled input signal by a window function to create an output signal. The rate at which the resampled data is replicated by the window function determines the pitch of the output signal.

公开(公告)号：US5519166A

公开(公告)日：1996-05-21

申请号：US330329

申请日：1994-10-27

申请人： Makoto Furuhashi ,  Masakazu Suzuoki ,  Ken Kutaragi

发明人： Makoto Furuhashi ,  Masakazu Suzuoki ,  Ken Kutaragi

IPC分类号： G10H3/12 ,  G10H7/08 ,  G10K15/02 ,  G10L19/02 ,  G10H7/06

CPC分类号： G10K15/02 ,  G10H3/125 ,  G10H7/08 ,  G10L19/02 ,  G10H2210/066 ,  G10H2250/105 ,  G10H2250/235 ,  G10H2250/281 ,  G10H2250/601 ,  Y10S84/09

摘要： A method for processing a digital signal produced by digitizing an analog signal such as a musical instrument sound signal, and an apparatus for producing sound source data. When the input signal contains a periodically repetitive wave form portion, the fundamental frequency and its high harmonic components of the input signal is extracted by a comb filter prior to signal processing which takes advantage of the periodicity of the input signal. The fundamental frequency or pitch is detected by performing Fourier transform to produce frequency components, phase matching these frequency components and performing inverse Fourier transform. When extracting a repetitive waveform portion or so-called looping domain, such looping domain having the highest similarity in waveform in the vicinity of both ends of the domain is selected. When the bit compression of digital signal data is performed by selecting a filter with blocks each consisting of plural samples as units, a pseudo signal is affixed to the input signal, before the start point of the input signal, which pseudo signal will cause a filter of the lowest order to be selected. The looping domain is set so as to be a whole number multiple of the block which serves as the unit for bit compression, and the parameters of the looping start block are formed on the basis of data of the start and the end blocks. By applying a part or the whole of the signal processing method to a sound source data forming apparatus, sound source data may be formed which is reduced in the looping noise and error caused by data compression and which is of superior sound quality.

摘要翻译： 一种用于处理通过数字化诸如乐器声音信号的模拟信号产生的数字信号的方法和用于产生声源数据的装置。 当输入信号包含周期性重复的波形部分时，在信号处理之前通过梳状滤波器提取输入信号的基频和其高次谐波分量，这利用了输入信号的周期。 通过执行傅里叶变换以产生频率分量，相位匹配这些频率分量并执行逆傅里叶变换来检测基频或音调。 当提取重复波形部分或所谓的循环域时，选择在该域的两端附近具有最高波形相似度的循环域。 当通过选择具有由多个样本组成的块的滤波器来执行数字信号数据的位压缩时，在输入信号的起始点之前将伪信号附加到输入信号，该伪信号将导致滤波器 的最低订单选择。 循环域被设置为作为用于位压缩的单位的块的整数倍，并且循环开始块的参数基于起始和结束块的数据形成。 通过将一部分或全部的信号处理方法应用于声源数据形成装置，可以形成声源数据，其减少了由数据压缩引起的循环噪声和误差，并且具有优良的音质。