公开(公告)号：US08019431B2

公开(公告)日：2011-09-13

申请号：US12476979

申请日：2009-06-02

Applicant: Kaibao Nie ,  Les Atlas ,  Jay Rubinstein ,  Xing Li ,  Charles Pascal Clark

Inventor： Kaibao Nie ,  Les Atlas ,  Jay Rubinstein ,  Xing Li ,  Charles Pascal Clark

IPC: A61N1/00

CPC classification number: A61N1/36036

Abstract: The restoration of melody perception is a key remaining challenge in cochlear implants. A novel sound coding strategy is proposed that converts an input audio signal into time-varying electrically stimulating pulse trains. A sound is first split into several frequency sub-bands with a fixed filter bank or a dynamic filter bank tracking harmonics in sounds. Each sub-band signal is coherently downward shifted to a low-frequency base band. These resulting coherent envelope signals have Hermitian symmetric frequency spectrums and are thus real-valued. A peak detector or high-rate sampler of half-wave rectified coherent envelope signals in each sub-band further converts the coherent envelopes into rate-varying, interleaved pulse trains. Acoustic simulations of cochlear implants using this new technique with normal hearing listeners, showed significant improvement in melody recognition over the most common conventional stimulation approach used in cochlear implants.

Abstract translation: 耳蜗感知的恢复是耳蜗植入物中仍然存在的关键问题。 提出了一种新颖的声音编码策略，将输入音频信号转换为时变电刺激脉冲串。 声音首先被分割成具有固定滤波器组或动态滤波器组的几个频率子带，以跟踪声音中的谐波。 每个子带信号相干地向下移位到低频基带。 这些产生的相干包络信号具有埃米特对称频谱，因此是实值。 每个子带中的半波整流相干包络信号的峰值检测器或高速采样器进一步将相干包络转换成速率变化的交错脉冲串。 使用这种新技术与正常听力听众的耳蜗植入物的声学模拟显示出在耳蜗植入物中使用的最常见的常规刺激方法的旋律识别显着改善。

公开(公告)号：US08126578B2

公开(公告)日：2012-02-28

申请号：US11862068

申请日：2007-09-26

Applicant: Les Atlas ,  Charles Pascal Clark

Inventor： Les Atlas ,  Charles Pascal Clark

IPC: G06F17/00

CPC classification number: G10L21/02 ,  G10L19/005 ,  G10L25/12

Abstract: A method and system for optimally repairing a clipped audio signal. Clipping occurs when a waveform exceeds a dynamic range of a recording device. Portions of an audio signal exceeding the dynamic range or saturation level of the recording device are clipped, causing distortion when the clipped recorded signal is played. To address this problem, successive frames of the clipped audio data are repaired to fill in gaps where the data were clipped. For each frame, an iterative process repetitively estimates an auto-covariance and detects clipped samples in the frame or a sub-frame in order to compute a least-squares solution for the frame that interpolates the clipped data. The process can cause inverted peaks in the repaired data, which must then be rectified to produced corrected repaired data. The corrected repaired data for the successive frames are recombined using interpolation, to produce a complete repaired audio data set.

Abstract translation: 一种用于最佳修复剪辑的音频信号的方法和系统。 当波形超过记录装置的动态范围时，发生剪切。 超过记录装置的动态范围或饱和度的音频信号的部分被限制，当被剪辑的记录信号被播放时导致失真。 为了解决这个问题，剪辑的音频数据的连续帧被修复以填补数据被剪切的间隙。 对于每个帧，迭代过程重复地估计自协方差并检测帧或子帧中的剪切样本，以便计算用于内插限幅数据的帧的最小二乘解。 该过程可能导致已修复数据中的反转峰值，然后必须对其进行纠正以产生校正的修复数据。 使用插值重新组合连续帧的校正后的数据，以产生完整的修复音频数据集。

公开(公告)号：US20090312820A1

公开(公告)日：2009-12-17

申请号：US12476979

申请日：2009-06-02

Applicant: Kaibao Nie ,  Les Atlas ,  Jay Rubinstein ,  Xing Li ,  Charles Pascal Clark

Inventor： Kaibao Nie ,  Les Atlas ,  Jay Rubinstein ,  Xing Li ,  Charles Pascal Clark

IPC: A61F11/04 ,  A61N1/36

CPC classification number: A61N1/36036

Abstract: The restoration of melody perception is a key remaining challenge in cochlear implants. A novel sound coding strategy is proposed that converts an input audio signal into time-varying electrically stimulating pulse trains. A sound is first split into several frequency sub-bands with a fixed filter bank or a dynamic filter bank tracking harmonics in sounds. Each sub-band signal is coherently downward shifted to a low-frequency base band. These resulting coherent envelope signals have Hermitian symmetric frequency spectrums and are thus real-valued. A peak detector or high-rate sampler of half-wave rectified coherent envelope signals in each sub-band further converts the coherent envelopes into rate-varying, interleaved pulse trains. Acoustic simulations of cochlear implants using this new technique with normal hearing listeners, showed significant improvement in melody recognition over the most common conventional stimulation approach used in cochlear implants.

Abstract translation: 耳蜗感知的恢复是耳蜗植入物中仍然存在的关键问题。 提出了一种新颖的声音编码策略，将输入音频信号转换为时变电刺激脉冲串。 声音首先被分割成具有固定滤波器组或动态滤波器组的几个频率子带，以跟踪声音中的谐波。 每个子带信号相干地向下移位到低频基带。 这些产生的相干包络信号具有埃米特对称频谱，因此是实值。 每个子带中的半波整流相干包络信号的峰值检测器或高速采样器进一步将相干包络转换成速率变化的交错脉冲串。 使用这种新技术与正常听力听众的耳蜗植入物的声学模拟显示出在耳蜗植入物中使用的最常见的常规刺激方法的旋律识别显着改善。

公开(公告)号：US20090083031A1

公开(公告)日：2009-03-26

申请号：US11862068

申请日：2007-09-26

Applicant: Les Atlas ,  Charles Pascal Clark

Inventor： Les Atlas ,  Charles Pascal Clark

IPC: G10L19/00

CPC classification number: G10L21/02 ,  G10L19/005 ,  G10L25/12

Abstract: A method and system for optimally repairing a clipped audio signal. Clipping occurs when a waveform exceeds a dynamic range of a recording device. Portions of an audio signal exceeding the dynamic range or saturation level of the recording device are clipped, causing distortion when the clipped recorded signal is played. To address this problem, successive frames of the clipped audio data are repaired to fill in gaps where the data were clipped. For each frame, an iterative process repetitively estimates an auto-covariance and detects clipped samples in the frame or a sub-frame in order to compute a least-squares solution for the frame that interpolates the clipped data. The process can cause inverted peaks in the repaired data, which must then be rectified to produced corrected repaired data. The corrected repaired data for the successive frames are recombined using interpolation, to produce a complete repaired audio data set.

Abstract translation: 一种用于最佳修复剪辑的音频信号的方法和系统。 当波形超过记录装置的动态范围时，发生剪切。 超过记录装置的动态范围或饱和度的音频信号的部分被限制，当被剪辑的记录信号被播放时导致失真。 为了解决这个问题，剪辑的音频数据的连续帧被修复以填补数据被剪切的间隙。 对于每个帧，迭代过程重复地估计自协方差并检测帧或子帧中的剪切样本，以便计算用于内插限幅数据的帧的最小二乘解。 该过程可能导致已修复数据中的反转峰值，然后必须对其进行纠正以产生校正的修复数据。 使用插值重新组合连续帧的校正后的数据，以产生完整的修复音频数据集。

公开(公告)号：US20090048828A1

公开(公告)日：2009-02-19

申请号：US11839355

申请日：2007-08-15

Applicant: Les Atlas ,  Charles Pascal Clark

Inventor： Les Atlas ,  Charles Pascal Clark

IPC: G10L19/02

CPC classification number: G10L19/005

Abstract: Information is estimated to fill-in even relatively long gaps (e.g., up to 250 ms) that occur in a signal due to physical errors in media or transmission, where the omitted information causes signal distortion. The signal is first divided into a plurality of subbands, since the gaps in each subband are individually easier to interpolate. Coherent demodulation is then employed on each subband signal to reduce the time-varying signals to a collection of pairs of frequency-modulated carriers multiplied by complex-valued envelopes, or modulators. Standard interpolation is then separately applied to the modulators and carriers of these pairs to fill-in the gaps in each of the subbands, and the interpolated pairs are remodulated. The resulting interpolated signals from each of the subbands are recombined to form the final interpolated output signal in which the gaps are filled in with estimated data.

Abstract translation: 估计信息由于媒体或传输中的物理错误而在信号中填充甚至相当长的间隙（例如，高达250ms），其中省略的信息引起信号失真。 信号首先被划分成多个子带，因为每个子带中的间隙容易内插。 然后在每个子带信号上采用相干解调，以将时变信号减少到乘以复值包络或调制器的频率调制载波对的集合。 然后将标准内插分别应用于这些对的调制器和载波以填充每个子带中的间隙，并且内插对被重新调制。 来自每个子带的所产生的内插信号被重新组合以形成其中用估计数据填充间隙的最终内插输出信号。