公开(公告)号：US09037454B2

公开(公告)日：2015-05-19

申请号：US12142809

申请日：2008-06-20

申请人： Byung-Jun Yoon ,  Henrique S. Malvar

发明人： Byung-Jun Yoon ,  Henrique S. Malvar

IPC分类号： G10L19/00 ,  G10L19/02

CPC分类号： G10L19/0212

摘要： An “Overcomplete Audio Coder” provides various techniques for overcomplete encoding audio signals using an MCLT-based predictive coder. Specifically, the Overcomplete Audio Coder uses unrestricted polar quantization of MCLT magnitude and phase coefficients. Further, quantized magnitude and phase coefficients are predicted based on properties of the audio signal and corresponding MCLT coefficients to reduce the bit rate overhead in encoding the audio signal. This prediction allows the Overcomplete Audio Coder to provide improved continuity of the magnitude of spectral components across encoded signal blocks, thereby reducing warbling artifacts. Coding rates achieved using these prediction techniques are comparable to that of encoding an orthogonal representation of an audio signal, such as with modulated lapped transform (MLT)-based coders. Finally, the Overcomplete Audio Coder provides a true magnitude-phase frequency-domain representation of the audio signal, thus allowing precise auditory models to be applied for improving compression performance, without the need for additional Fourier transforms.

摘要翻译： “完全音频编码器”提供了使用基于MCLT的预测编码器对音频信号进行过度编码的各种技术。 具体来说，过度完整音频编码器使用MCLT幅度和相位系数的不受限制的极坐标量化。 此外，基于音频信号和相应的MCLT系数的特性来预测量化幅度和相位系数，以减少编码音频信号中的比特率开销。 该预测允许过度完整的音频编码器提供经编码的信号块的频谱分量的改善的连续性，从而减少波纹伪影。 使用这些预测技术实现的编码速率与编码音频信号的正交表示的编码速率相当，例如使用基于调制重叠变换（MLT）的编码器。 最后，过完整音频编码器提供音频信号的真正的幅度相位频域表示，因此允许精确的听觉模型用于改善压缩性能，而不需要额外的傅里叶变换。

公开(公告)号：US20090319278A1

公开(公告)日：2009-12-24

申请号：US12142809

申请日：2008-06-20

申请人： Byung-Jun Yoon ,  Henrique S. Malvar

发明人： Byung-Jun Yoon ,  Henrique S. Malvar

IPC分类号： G10L19/00

CPC分类号： G10L19/0212

摘要： An “Overcomplete Audio Coder” provides various techniques for overcomplete encoding audio signals using an MCLT-based predictive coder. Specifically, the Overcomplete Audio Coder uses unrestricted polar quantization of MCLT magnitude and phase coefficients. Further, quantized magnitude and phase coefficients are predicted based on properties of the audio signal and corresponding MCLT coefficients to reduce the bit rate overhead in encoding the audio signal. This prediction allows the Overcomplete Audio Coder to provide improved continuity of the magnitude of spectral components across encoded signal blocks, thereby reducing warbling artifacts. Coding rates achieved using these prediction techniques are comparable to that of encoding an orthogonal representation of an audio signal, such as with modulated lapped transform (MLT)-based coders. Finally, the Overcomplete Audio Coder provides a true magnitude-phase frequency-domain representation of the audio signal, thus allowing precise auditory models to be applied for improving compression performance, without the need for additional Fourier transforms.

摘要翻译： “完全音频编码器”提供了使用基于MCLT的预测编码器对音频信号进行过度编码的各种技术。 具体来说，过度完整音频编码器使用MCLT幅度和相位系数的不受限制的极坐标量化。 此外，基于音频信号和相应的MCLT系数的特性来预测量化幅度和相位系数，以减少编码音频信号中的比特率开销。 该预测允许过度完整的音频编码器提供经编码的信号块的频谱分量的改善的连续性，从而减少波纹伪影。 使用这些预测技术实现的编码速率与编码音频信号的正交表示的编码速率相当，例如使用基于调制重叠变换（MLT）的编码器。 最后，过完整音频编码器提供音频信号的真正的幅度相位频域表示，因此允许精确的听觉模型用于改善压缩性能，而不需要额外的傅里叶变换。

公开(公告)号：US08005238B2

公开(公告)日：2011-08-23

申请号：US11689628

申请日：2007-03-22

申请人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

发明人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

IPC分类号： H04B15/00

CPC分类号： G01S3/86 ,  H04B7/0854 ,  H04R3/005 ,  H04R2430/20

摘要： A novel adaptive beamforming technique with enhanced noise suppression capability. The technique incorporates the sound-source presence probability into an adaptive blocking matrix. In one embodiment the sound-source presence probability is estimated based on the instantaneous direction of arrival of the input signals and voice activity detection. The technique guarantees robustness to steering vector errors without imposing ad hoc constraints on the adaptive filter coefficients. It can provide good suppression performance for both directional interference signals as well as isotropic ambient noise.

摘要翻译： 一种具有增强噪声抑制能力的新型自适应波束成形技术。 该技术将声源存在概率纳入自适应阻塞矩阵。 在一个实施例中，基于输入信号的瞬时到达方向和语音活动检测来估计声源存在概率。 该技术保证对导向矢量误差的鲁棒性，而不会对自适应滤波器系数施加自组织约束。 它可以为双向干扰信号以及各向同性环境噪声提供良好的抑制性能。

公开(公告)号：US08818002B2

公开(公告)日：2014-08-26

申请号：US13187618

申请日：2011-07-21

申请人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

发明人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

IPC分类号： H04B15/00 ,  G01S3/86 ,  H04R3/00 ,  H04B7/08

CPC分类号： G01S3/86 ,  H04B7/0854 ,  H04R3/005 ,  H04R2430/20

摘要： A novel adaptive beamforming technique with enhanced noise suppression capability. The technique incorporates the sound-source presence probability into an adaptive blocking matrix. In one embodiment the sound-source presence probability is estimated based on the instantaneous direction of arrival of the input signals and voice activity detection. The technique guarantees robustness to steering vector errors without imposing ad hoc constraints on the adaptive filter coefficients. It can provide good suppression performance for both directional interference signals as well as isotropic ambient noise.

摘要翻译： 一种具有增强噪声抑制能力的新型自适应波束成形技术。 该技术将声源存在概率纳入自适应阻塞矩阵。 在一个实施例中，基于输入信号的瞬时到达方向和语音活动检测来估计声源存在概率。 该技术保证对导向矢量误差的鲁棒性，而不会对自适应滤波器系数施加自组织约束。 它可以为双向干扰信号以及各向同性环境噪声提供良好的抑制性能。

公开(公告)号：US20110274291A1

公开(公告)日：2011-11-10

申请号：US13187618

申请日：2011-07-21

申请人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

发明人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

IPC分类号： H04B15/00

CPC分类号： G01S3/86 ,  H04B7/0854 ,  H04R3/005 ,  H04R2430/20

摘要： A novel adaptive beamforming technique with enhanced noise suppression capability. The technique incorporates the sound-source presence probability into an adaptive blocking matrix. In one embodiment the sound-source presence probability is estimated based on the instantaneous direction of arrival of the input signals and voice activity detection. The technique guarantees robustness to steering vector errors without imposing ad hoc constraints on the adaptive filter coefficients. It can provide good suppression performance for both directional interference signals as well as isotropic ambient noise.

摘要翻译： 一种具有增强噪声抑制能力的新型自适应波束成形技术。 该技术将声源存在概率纳入自适应阻塞矩阵。 在一个实施例中，基于输入信号的瞬时到达方向和语音活动检测来估计声源存在概率。 该技术保证对导向矢量误差的鲁棒性，而不会对自适应滤波器系数施加自组织约束。 它可以为双向干扰信号以及各向同性环境噪声提供良好的抑制性能。

公开(公告)号：US20080232607A1

公开(公告)日：2008-09-25

申请号：US11689628

申请日：2007-03-22

申请人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

发明人： Ivan Tashev ,  Alejandro Acero ,  Byung-Jun Yoon

IPC分类号： H03B29/00 ,  G01S3/00 ,  H04B15/00 ,  H04R3/00

CPC分类号： G01S3/86 ,  H04B7/0854 ,  H04R3/005 ,  H04R2430/20

摘要： A novel adaptive beamforming technique with enhanced noise suppression capability. The technique incorporates the sound-source presence probability into an adaptive blocking matrix. In one embodiment the sound-source presence probability is estimated based on the instantaneous direction of arrival of the input signals and voice activity detection. The technique guarantees robustness to steering vector errors without imposing ad hoc constraints on the adaptive filter coefficients. It can provide good suppression performance for both directional interference signals as well as isotropic ambient noise.

摘要翻译： 一种具有增强噪声抑制能力的新型自适应波束成形技术。 该技术将声源存在概率纳入自适应阻塞矩阵。 在一个实施例中，基于输入信号的瞬时到达方向和语音活动检测来估计声源存在概率。 该技术保证对导向矢量误差的鲁棒性，而不会对自适应滤波器系数施加自组织约束。 它可以为双向干扰信号以及各向同性环境噪声提供良好的抑制性能。