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40 条记录 (耗时 0.018 秒)

    Beat analysis of musical signals
    2.
    发明授权
    Beat analysis of musical signals 失效
    节奏分析音乐信号

    公开(公告)号：US07026536B2

    公开(公告)日：2006-04-11

    申请号：US10811287

    申请日：2004-03-25

    申请人： Lie Lu ,  Hong-Jiang Zhang

    发明人： Lie Lu ,  Hong-Jiang Zhang

    IPC分类号： G10H7/00

    CPC分类号： G10H1/40 ,  G10H2210/076 ,  G10H2210/391 ,  G10H2240/325 ,  G10H2250/135 ,  G10H2250/285

    摘要： A system and methods analyze music to detect musical beats and to rectify beats that are out of sync with the actual beat phase of the music. The music analysis includes onset detection, tempo/meter estimation, and beat analysis, which includes the rectification of out-of-sync beats.

    摘要翻译： 系统和方法分析音乐以检测音乐节奏并纠正与音乐的实际节奏不同步的节奏。 音乐分析包括开始检测，速度/仪表估计和拍频分析，其中包括纠错不同步拍摄。

    Programmable melody generator
    3.
    发明授权
    Programmable melody generator 有权
    可编程旋律发生器

    公开(公告)号：US06965069B2

    公开(公告)日：2005-11-15

    申请号：US09965141

    申请日：2001-09-26

    申请人： Laurent Le-Faucheur ,  Gilles Dassot

    发明人： Laurent Le-Faucheur ,  Gilles Dassot

    IPC分类号： G10H7/02 ,  G10H7/08

    CPC分类号： G10H7/08 ,  G10H7/02 ,  G10H2250/281 ,  G10H2250/285 ,  G10H2250/631

    摘要： A digital system and method of operation is provided in which musical notes and melodies are synthesized. The operation done for music synthesis is based on time domain processing of prerecorded waveforms, referred to as analysis waveforms. The computations are done using time-marks, which is a set of digital sample positions of the analysis waveform indicating the starting position of each period of the fundamental frequency or an arbitrary position for non-periodic analysis waveforms. The algorithm defines on a time scale the time-marks of the synthesis waveform. The synthesis is based on making a relation between the analysis time-marks and the synthesis time-marks. The synthesis waveforms are built with the extraction of small portions of signal located at corresponding time-mark positions of the analysis waveform and adding them to the corresponding synthesis time-marks on the synthesis time-scale. This extraction is done with the multiplication of a windowing pattern, such as a cosinous Hanning window, to the analysis samples.

    摘要翻译： 提供了一种数字系统和操作方法，其中合成了音符和旋律。 用于音乐合成的操作是基于预先记录的波形的时域处理，被称为分析波形。 使用时间标记进行计算，时间标记是分析波形的一组数字采样位置，指示基频的每个周期的开始位置或非周期性分析波形的任意位置。 该算法在时间尺度上定义了合成波形的时间标记。 该合成是基于分析时间标记与合成时间标记之间的关系。 通过提取位于分析波形的对应时标位置处的信号的小部分，并将它们合成到合成时间标度上的对应合成时间标记上来构建合成波形。 这种提取是通过窗口化模式（例如平坦的汉宁窗口）与分析样本的乘积来完成的。

    Method and apparatus for generating musical tone signals
    5.
    发明授权
    Method and apparatus for generating musical tone signals 失效
    用于产生乐音信号的方法和装置

    公开(公告)号：US4395931A

    公开(公告)日：1983-08-02

    申请号：US245126

    申请日：1981-03-18

    申请人： Masatada Wachi

    发明人： Masatada Wachi

    IPC分类号： G10H1/24 ,  G10H7/08 ,  G10H1/08 ,  G10H7/00

    CPC分类号： G10H7/08 ,  G10H2250/091 ,  G10H2250/271 ,  G10H2250/275 ,  G10H2250/281 ,  G10H2250/285

    摘要： A method and an apparatus for producing a musical tone of the so-called partial tone synthesizing type are disclosed, in which the sampling frequencies are established with respect to the respective partial tone components to satisfy the sampling theorem, and the highest frequency among the sampling frequencies is used as a reference frequency. Ratios of sampling frequencies of respective partial tone components to the reference frequency are determined. A partial tone component having a ratio of one is calculated with one channel at a period corresponding to the reference frequency whereas a plurality of partial tone components each having a ratio of less than one are combined into a set wherein the sum of the ratios of the combined partial tone components does not exceed one and the plurality of partial tone components are calculated on the time division basis with one channel at periods corresponding to the respective sampling frequencies.

    摘要翻译： 公开了一种用于产生所谓的部分色调合成类型的乐音的方法和装置，其中相对于各个部分色调分量建立采样频率以满足采样定理，并且采样中的最高频率 频率用作参考频率。 确定各个部分色调分量到参考频率的采样频率的比率。 在与参考频率相对应的周期，用一个信道计算比率为1的部分色调分量，而具有小于1的比率的多个部分色调分量被组合成一组，其中， 组合的部分色调分量不超过一个，并且在与各个采样频率相对应的周期的情况下，以时分方式计算多个部分色调分量与一个频道。

    Method and apparatus for adjusting the pitch and timbre of an input signal in a controlled manner
    10.
    发明授权
    Method and apparatus for adjusting the pitch and timbre of an input signal in a controlled manner 失效
    用于以受控的方式调节输入信号的音调和音色的方法和装置

    公开(公告)号：US5969282A

    公开(公告)日：1999-10-19

    申请号：US124178

    申请日：1998-07-28

    申请人： David P. Berners ,  William R. Ciullo

    发明人： David P. Berners ,  William R. Ciullo

    IPC分类号： G10H1/20 ,  G10H3/12 ,  G10H1/06

    CPC分类号： G10H1/20 ,  G10H3/125 ,  G10H2250/285 ,  G10H2250/501

    摘要： A system and method are disclosed for independently adjusting the pitch and timbre of an input signal within a modified Lent shifter. A method of adjusting the pitch and timbre of an input signal includes receiving an input signal and determining a window length corresponding to the input signal. A finite length spectrally smoothed signal is created from the input signal by synchronously windowing the input signal. The timbre of the finite length spectrally smoothed signal is adjusted thereby creating a finite length timbre adjusted signal. The finite length timbre adjusted signal is recombined at a rate necessary to produce a desired output pitch thereby reducing artifacts introduced by processing the finite length timbre adjusted signal and minimizing latency between receiving the input signal and producing a desired output signal.

    摘要翻译： 公开了一种系统和方法，用于独立地调整修改的拨号移位器内的输入信号的音调和音色。 调整输入信号的音调和音色的方法包括接收输入信号并确定对应于输入信号的窗口长度。 通过对输入信号同步加窗，从输入信号产生有限长度的光谱平滑信号。 调整有限长度光谱平滑信号的音色，从而产生有限长度音调调整信号。 有限长度音调调整信号以产生期望输出音调所需的速率重新组合，从而减少通过处理有限长度音调调整信号引入的伪影，并最小化接收输入信号并产生期望输出信号之间的等待时间。