Process for removing voice from stereo recordings
    1.
    发明授权
    Process for removing voice from stereo recordings 有权
    从立体声录音中删除语音的过程

    公开(公告)号:US08767969B1

    公开(公告)日:2014-07-01

    申请号:US10415770

    申请日:2000-09-27

    IPC分类号: H04R5/00 H04S3/02

    摘要: A system (200) for processing a sound signal (212) that allows dynamic customization of perceived spatial positions and sound qualities of sound components associated with the sound signal (212). The system provides apparatus for processing a sound signal (212) that includes an input to receive the sound signal (212), a sound unmixer (204) coupled to the input to receive the sound signal (212) and unmix at least one sound stream (216) from the sound signal (212) based on at least one unmixing instruction (214), and an output coupled to the sound unmixer (214) to output the at least one sound stream (216).

    摘要翻译: 一种用于处理声音信号(212)的系统(200),所述声音信号允许对所述声音信号(212)相关联的声音分量的感知空间位置和声音质量的动态定制。 该系统提供用于处理声音信号(212)的装置,该声音信号包括用于接收声音信号的输入端(212),耦合到该输入端以接收声音信号的声音混合器(204),并且混合至少一个声音流 (214),基于至少一个解混合指令(214)从所述声音信号(212)输出信号(216),以及耦合到所述声音混合器(214)以输出所述至少一个声音流(216)的输出。

    Audio-visual scrubbing system
    3.
    发明授权
    Audio-visual scrubbing system 有权
    视听洗涤系统

    公开(公告)号:US06687664B1

    公开(公告)日:2004-02-03

    申请号:US09419128

    申请日:1999-10-15

    IPC分类号: G10L1900

    CPC分类号: G10L21/04

    摘要: A method and apparatus for an audio scrubbing system for synchronizing audio to an asynchronous clock while preserving pitch utilizes a phase-vocoder to implement time-scaling without pitch-shifting.

    摘要翻译: 用于将音频同步到异步时钟同时保持音调的音频擦除系统的方法和装置利用相位声码器实现无间距移位的时间缩放。

    Phase-vocoder pitch-shifting
    4.
    发明授权
    Phase-vocoder pitch-shifting 有权
    相位声码器音调转换

    公开(公告)号:US06549884B1

    公开(公告)日:2003-04-15

    申请号:US09399920

    申请日:1999-09-21

    IPC分类号: G10L1914

    CPC分类号: G10L19/26 G10L21/003

    摘要: A system for pitch-shifting an audio signal wherein resampling is done in the frequency domain. The system includes a method for pitch-shifting a signal by converting the signal to a frequency domain representation and then identifying a specific region in the frequency domain representation. The region being located at a first frequency location. Next, the region is shifted to a second frequency location to form a adjusted frequency domain representation. Finally, the adjusted frequency domain representation is transformed to a time domain signal representing the input signal with shifted pitch. This eliminates the expensive time domain resampling stage and allows the computational costs to become independent of the pitch modification factor.

    摘要翻译: 一种用于对音频信号进行音调移位的系统,其中在频域中进行重采样。 该系统包括通过将信号转换为频域表示然后识别频域表示中的特定区域来对信号进行音调移位的方法。 该区域位于第一频率位置。 接下来,将区域移动到第二频率位置以形成调整的频域表示。 最后,将经调整的频域表示变换为表示具有偏移音调的输入信号的时域信号。 这消除了昂贵的时域重采样级,并且允许计算成本独立于音调修正因子。

    METHOD FOR ENHANCING AUDIO SIGNALS
    5.
    发明申请
    METHOD FOR ENHANCING AUDIO SIGNALS 有权
    增强音频信号的方法

    公开(公告)号:US20070258603A1

    公开(公告)日:2007-11-08

    申请号:US11744465

    申请日:2007-05-04

    IPC分类号: H03G7/00

    CPC分类号: H03G5/165

    摘要: A frequency band of an audio input signal is analyzed to determine if a transient is present. When transients are detected, modifications are made to the intensity levels corresponding to the frequency band for a brief time period.

    摘要翻译: 分析音频输入信号的频带以确定是否存在瞬态。 当检测到瞬变时,对短暂的时间段对应于频带的强度水平进行修改。

    Method and apparatus for transient detection and non-distortion time scaling
    6.
    发明授权
    Method and apparatus for transient detection and non-distortion time scaling 有权
    用于瞬态检测和非失真时间缩放的方法和装置

    公开(公告)号:US06766300B1

    公开(公告)日:2004-07-20

    申请号:US09378377

    申请日:1999-08-20

    申请人: Jean Laroche

    发明人: Jean Laroche

    IPC分类号: G01L1900

    摘要: A method and apparatus for transient detection and time-scaling an audio signal detects transients and scales only intervals located between transients to avoid artifacts. In one embodiment, the transient detection process compares frequency characteristic energy between succeeding windows of the audio signal and calculates values of an energy curve where the energy increases. Transients are detected at maxima of the energy curve.

    摘要翻译: 用于瞬态检测和时间缩放音频信号的方法和装置检测瞬变并仅缩放位于瞬态之间的间隔,以避免伪影。 在一个实施例中,瞬态检测过程比较音频信号的后续窗口之间的频率特性能量并计算能量增加的能量曲线的值。 在能量曲线的最大值处检测瞬态。

    Process for removing voice from stereo recordings
    7.
    发明授权
    Process for removing voice from stereo recordings 有权
    从立体声录音中删除语音的过程

    公开(公告)号:US06405163B1

    公开(公告)日:2002-06-11

    申请号:US09405941

    申请日:1999-09-27

    申请人: Jean Laroche

    发明人: Jean Laroche

    IPC分类号: G10L1100

    摘要: A method and apparatus for removing or amplifying voice or other signals panned to the center of a stereo recording utilizes frequency domain techniques to calculate a frequency dependent gain factor based on the difference between the frequency domain spectra of the stereo channels.

    摘要翻译: 用于去除或放大平移到立体声记录中心的语音或其他信号的方法和装置利用频域技术来基于立体声通道的频域频谱之间的差来计算频率相关增益因子。

    Optimal looping for wavetable synthesis
    8.
    发明授权
    Optimal looping for wavetable synthesis 有权
    波形合成的最佳循环

    公开(公告)号:US6084170A

    公开(公告)日:2000-07-04

    申请号:US393442

    申请日:1999-09-08

    申请人: Jean Laroche

    发明人: Jean Laroche

    IPC分类号: G10H7/02 G10H7/00 G11C7/00

    CPC分类号: G10H7/02

    摘要: In accordance with the present invention, a method and apparatus are provided wherein loop discontinuities are eliminated. In the case of amplitude discontinuities, the harmonic amplitudes contained in the loop are progressively scaled over the duration of the loop, so that for each harmonic the loop end amplitude matches the loop beginning amplitude. In the case of phase discontinuities, the harmonic phases are progressively shifted over the duration of the loop, so that for each harmonic the loop end phase matches the loop beginning phase. Shifting the phase is accomplished by slightly altering the frequency of the harmonics to produce the desired amount of phase-shift at the loop end. In accordance with the present invention, the method also provides a technique to select loop begin and end points to minimize the amount of phase adjustment.

    摘要翻译: 根据本发明,提供了一种消除循环不连续性的方法和装置。 在幅度不连续的情况下,循环中包含的谐波振幅在循环的持续时间内逐渐缩放,因此对于每个谐波,环路端振幅与环路起始幅度相匹配。 在相位不连续的情况下,谐波相位在环路的持续时间内逐渐移动,因此对于每个谐波,环路端相位与环路开始相位匹配。 通过稍微改变谐波的频率以在环路端产生期望量的相移来实现转换相位。 根据本发明,该方法还提供一种选择循环开始和结束点以最小化相位调整量的技术。

    Time-domain time/pitch scaling of speech or audio signals with transient
handling
    9.
    发明授权
    Time-domain time/pitch scaling of speech or audio signals with transient handling 失效
    具有瞬态处理的语音或音频信号的时域时间/音调缩放

    公开(公告)号:US6049766A

    公开(公告)日:2000-04-11

    申请号:US745929

    申请日:1996-11-07

    申请人: Jean Laroche

    发明人: Jean Laroche

    IPC分类号: G10L21/04 G10L3/02 G10L9/00

    CPC分类号: G10L21/01

    摘要: Method and apparatus for time-scaling and/or pitch shifting by discarding and/or repeating segments of a signal. The signal is stored as a series of samples in a memory where it is readable by one or more read pointers. Periodicity of segments of the signal is determined by evaluating normalized cross-correlation over a range of possible periods. Transients are detected by monitoring changes in rms signal value. To achieve time compression or time stretching, a segment is skipped/discarded whenever a maximum time-discrepancy between the current output and an ideal output is reached or a high periodicity is detected, a jump of the optimal length would not make this time discrepancy too high, and no transient is present in the segment to be skipped/discarded.

    摘要翻译: 用于通过丢弃和/或重复信号段来对时间缩放和/或音调移位的方法和装置。 该信号作为一系列样本存储在存储器中,其可被一个或多个读指针读取。 信号的段的周期性通过在可能的周期的范围内评估归一化的互相关来确定。 通过监测有效值信号值的变化检测瞬态。 为了实现时间压缩或时间延伸,每当达到当前输出和理想输出之间的最大时间差异或检测到高周期性时,跳过/丢弃一个段,最佳长度的跳跃也不会使此时间差异 高,并且在要跳过/丢弃的段中不存在瞬态。