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1. 发明授权

US08743173B2 Video phone system 有权
标题翻译：视频电话系统
公开(公告)号：US08743173B2
公开(公告)日：2014-06-03
申请号：US13464222
申请日：2012-05-04
申请人： Phillip A. Hetherington , Mario Vaira , Alex Escott
发明人： Phillip A. Hetherington , Mario Vaira , Alex Escott
IPC分类号： H04N7/14
CPC分类号： G06F3/04883 , H04L65/403 , H04L65/605 , H04N7/14 , H04N7/142 , H04N7/15
摘要： A system allocates channel bandwidth based on the data received from a plurality of remote sources. A de-multiplexer/priority circuit separates two or more different data streams into their components parts. A stream modification driver modifies one or more characteristics of the data received from the de-multiplexer/priority circuit based on a priority assigned to the data by the de-multiplexer/priority circuit. The de-multiplexer/priority circuit determines the data transfer rates for each of the different data streams based on the assigned priority.
摘要翻译：系统基于从多个远程源接收的数据来分配信道带宽。去多路复用器/优先级电路将两个或多个不同的数据流分离成它们的组成部分。流修改驱动器基于由去多路复用器/优先级电路分配给数据的优先级来修改从解复用器/优先级电路接收的数据的一个或多个特性。解复用器/优先级电路基于分配的优先级来确定每个不同数据流的数据传输速率。

2. 发明授权

US08494179B2 Mixer with adaptive post-filtering 有权
标题翻译：混合器具有自适应后置滤波
公开(公告)号：US08494179B2
公开(公告)日：2013-07-23
申请号：US13331753
申请日：2011-12-20
申请人： Phillip A. Hetherington
发明人： Phillip A. Hetherington
IPC分类号： H04B15/00
CPC分类号： G10L21/0208 , G10K11/16 , G10L19/26 , G10L21/02 , G10L2021/02165 , H04R3/005
摘要： A noise reduction system includes multiple transducers that generate time domain signals. A transforming device transforms the time domain signals into frequency domain signals. A signal mixing device mixes the frequency domain signals according to a mixing ratio. Frequency domain signals are rotated in phase to generate phase rotated signals. A post-processing device attenuates portions of the output based on coherency levels of the signals.
摘要翻译：降噪系统包括产生时域信号的多个换能器。变换装置将时域信号变换成频域信号。信号混合装置根据混合比混合频域信号。频域信号相位旋转以产生相位旋转信号。后处理设备基于信号的相干性水平来衰减输出的部分。

3. 发明授权

US08326617B2 Speech enhancement with minimum gating 有权
标题翻译：语音增强与最小门控
公开(公告)号：US08326617B2
公开(公告)日：2012-12-04
申请号：US12454841
申请日：2009-05-22
申请人： Phillip A. Hetherington , Shreyas Paranjpe , Xueman Li
发明人： Phillip A. Hetherington , Shreyas Paranjpe , Xueman Li
IPC分类号： G10L21/02 , G10L21/00
CPC分类号： G10L21/0208 , G10L19/012 , G10L19/26
摘要： A speech enhancement system enhances transitions between speech and non-speech segments. The system includes a background noise estimator that approximates the magnitude of a background noise of an input signal that includes a speech and a non-speech segment. A slave processor is programmed to perform the specialized task of modifying a spectral tilt of the input signal to match a plurality of expected spectral shapes selected by a Codec.
摘要翻译：语音增强系统增强语音和非语音段之间的转换。该系统包括背景噪声估计器，其近似包括语音和非语音段的输入信号的背景噪声的幅度。从属处理器被编程为执行修改输入信号的频谱倾斜以匹配由编解码器选择的多个预期频谱形状的专门任务。

4. 发明授权

US08311819B2 System for detecting speech with background voice estimates and noise estimates 有权
标题翻译：用于用背景语音估计和噪声估计来检测语音的系统
公开(公告)号：US08311819B2
公开(公告)日：2012-11-13
申请号：US12079376
申请日：2008-03-26
申请人： Phillip A. Hetherington , Mark Fallat
发明人： Phillip A. Hetherington , Mark Fallat
IPC分类号： G10L15/20 , G10L15/04
CPC分类号： G10L25/87
摘要： A system detects a speech segment that may include unvoiced, fully voiced, or mixed voice content. The system includes a digital converter that converts a time-varying input signal into a digital-domain signal. A window function passes signals within a programmed aural frequency range while substantially blocking signals above and below the programmed aural frequency range when multiplied by an output of the digital converter. A frequency converter converts the signals passing within the programmed aural frequency range into a plurality of frequency bins. A background voice detector estimates the strength of a background speech segment relative to the noise of selected portions of the aural spectrum. A noise estimator estimates a maximum distribution of noise to an average of an acoustic noise power of some of the plurality of frequency bins. A voice detector compares the strength of a desired speech segment to a criterion based on an output of the background voice detector and an output of the noise estimator.
摘要翻译：系统检测可能包括清音，完全有声或混合语音内容的语音段。该系统包括将时变输入信号转换为数字域信号的数字转换器。窗口功能在编程的听觉频率范围内传递信号，同时在与数字转换器的输出相乘时，基本上阻挡高于和低于编程的听觉频率范围的信号。变频器将在编程的听觉频率范围内通过的信号转换成多个频率仓。背景语音检测器估计背景语音段相对于听觉频谱的所选部分的噪声的强度。噪声估计器将噪声的最大分布估计为多个频率仓中的一些频率仓的声学噪声功率的平均值。语音检测器基于背景语音检测器的输出和噪声估计器的输出将期望语音段的强度与标准进行比较。

5. 发明授权

US08219389B2 System for improving speech intelligibility through high frequency compression 有权
标题翻译：通过高频压缩提高语音清晰度的系统
公开(公告)号：US08219389B2
公开(公告)日：2012-07-10
申请号：US13336149
申请日：2011-12-23
申请人： Phillip A. Hetherington , Xueman Li
发明人： Phillip A. Hetherington , Xueman Li
IPC分类号： G10L21/00 , G10L19/14
CPC分类号： G10L21/02 , G10L21/0232 , G10L21/0264 , G10L21/0364
摘要： A speech enhancement system that improves the intelligibility and the perceived quality of processed speech includes a frequency transformer and a spectral compressor. The frequency transformer converts speech signals from the time domain to the frequency domain. The spectral compressor compresses a pre-selected portion of the high frequency band and maps the compressed high frequency band to a lower band limited frequency range.
摘要翻译：提高处理语音的可懂度和感知质量的语音增强系统包括频率变换器和频谱压缩器。变频器将语音信号从时域转换为频域。频谱压缩器压缩高频带的预选部分，并将压缩的高频带映射到较低频带限制的频率范围。

6. 发明授权

US08194881B2 Detection and suppression of wind noise in microphone signals 有权
标题翻译：麦克风信号中风噪声的检测和抑制
公开(公告)号：US08194881B2
公开(公告)日：2012-06-05
申请号：US11925323
申请日：2007-10-26
申请人： Tim Haulick , Markus Buck , Phillip A. Hetherington , Klaus Haindl
发明人： Tim Haulick , Markus Buck , Phillip A. Hetherington , Klaus Haindl
IPC分类号： H04B15/00 , H04R3/00 , H04R25/00
CPC分类号： G10L21/0208 , G10L2021/02166 , H04R3/005 , H04R2410/01 , H04R2410/07 , H04R2499/13
摘要： To reliably and consistently detect desirable sounds, a system detects the presence of wind noise based on the power levels of audio signals. A first transducer detects sound originating from a first direction and a second transducer detects sound originating from a second direction. The power levels of the sound are compared. When the power level of the sound received from the second transducer is less than the power level of the sound received from the first transducer by a predetermined value, wind noise may be present. A signal processor may generate an output from one or a combination of the audio signals, based on a wind noise detection.
摘要翻译：为了可靠和一致地检测所需声音，系统基于音频信号的功率电平来检测风噪声的存在。第一换能器检测源于第一方向的声音，第二换能器检测来自第二方向的声音。比较声音的功率级别。当从第二换能器接收的声音的功率水平小于从第一换能器接收的声音的功率水平预定值时，可能存在风噪声。信号处理器可以基于风噪声检测从一个音频信号或其组合生成输出。

7. 发明授权

US08015002B2 Dynamic noise reduction using linear model fitting 有权
标题翻译：使用线性模型拟合的动态降噪
公开(公告)号：US08015002B2
公开(公告)日：2011-09-06
申请号：US11923358
申请日：2007-10-24
申请人： Xueman Li , Rajeev Nongpiur , Phillip A. Hetherington
发明人： Xueman Li , Rajeev Nongpiur , Phillip A. Hetherington
IPC分类号： G10L21/02 , G10L15/20
CPC分类号： G10L21/0208
摘要： A speech enhancement system improves the speech quality and intelligibility of a speech signal. The system includes a time-to-frequency converter that converts segments of a speech signal into frequency bands. A signal detector measures the signal power of the frequency bands of each speech segment. A background noise estimator measures a background noise detected in the speech signal. A dynamic noise reduction controller dynamically models the background noise in the speech signal. The speech enhancement renders a speech signal perceptually pleasing to a listener by dynamically attenuating a portion of the noise that occurs in a portion of the spectrum of the speech signal.
摘要翻译：语音增强系统提高语音信号的语音质量和可懂度。该系统包括将语音信号的段转换成频带的时间 - 频率转换器。信号检测器测量每个语音段的频带的信号功率。背景噪声估计器测量在语音信号中检测到的背景噪声。动态降噪控制器动态建模语音信号中的背景噪声。语音增强通过动态地衰减出现在语音信号的频谱的一部分中的噪声的一部分，从而使聆听者感觉到愉悦的语音信号。

8. 发明申请

US20110066430A1 Robust Noise Estimation 有权
标题翻译：鲁棒噪声估计
公开(公告)号：US20110066430A1
公开(公告)日：2011-03-17
申请号：US12948121
申请日：2010-11-17
申请人： Phillip A. Hetherington
发明人： Phillip A. Hetherington
IPC分类号： G10L21/02
CPC分类号： G10L21/0208
摘要： An enhancement system improves the estimate of noise from a received signal. The system includes a spectrum monitor that divides a portion of the signal at more than one frequency resolution. Adaptation logic derives a noise adaptation factor of the received signal. A plurality of devices tracks the characteristics of an estimated noise in the received signal and modifies multiple noise adaptation rates. Weighting logic applies the modified noise adaptation rates derived from the signal divided at a first frequency resolution to the signal divided at a second frequency resolution.
摘要翻译：增强系统改善了来自接收信号的噪声估计。该系统包括频谱监视器，其以一个以上的频率分辨率对信号的一部分进行分频。适应逻辑导出接收信号的噪声适配因子。多个设备跟踪接收信号中的估计噪声的特性并修改多个噪声自适应速率。加权逻辑将从以第一频率分辨率划分的信号导出的修改的噪声适应率应用于以第二频率分辨率划分的信号。

9. 发明授权

US07895036B2 System for suppressing wind noise 有权
标题翻译：抑制风噪的系统
公开(公告)号：US07895036B2
公开(公告)日：2011-02-22
申请号：US10688802
申请日：2003-10-16
申请人： Phillip A. Hetherington , Xueman Li , Pierre Zakarauskas
发明人： Phillip A. Hetherington , Xueman Li , Pierre Zakarauskas
IPC分类号： G10L21/02
CPC分类号： G10L21/0208 , G10L21/0232
摘要： A voice enhancement logic improves the perceptual quality of a processed voice. The voice enhancement system includes a noise detector and a noise attenuator. The noise detector detects a wind buffet and a continuous noise by modeling the wind buffet. The noise attenuator dampens the wind buffet to improve the intelligibility of an unvoiced, a fully voiced, or a mixed voice segment.
摘要翻译：语音增强逻辑提高了处理语音的感知质量。语音增强系统包括噪声检测器和噪声衰减器。噪音检测器通过对风自助餐进行建模来检测风自助餐和持续的噪音。噪音衰减器抑制风自助餐，以提高清音，完全浊音或混合声音段的清晰度。

10. 发明授权

US07844453B2 Robust noise estimation 有权
标题翻译：鲁棒噪声估计
公开(公告)号：US07844453B2
公开(公告)日：2010-11-30
申请号：US11644414
申请日：2006-12-22
申请人： Phillip A. Hetherington
发明人： Phillip A. Hetherington
IPC分类号： G10L21/02
CPC分类号： G10L21/0208
摘要： An enhancement system improves the estimate of noise from a received signal. The system includes a spectrum monitor that divides a portion of the signal at more than one frequency resolution. Adaptation logic derives a noise adaptation factor of the received signal. A plurality of devices tracks the characteristics of an estimated noise in the received signal and modifies multiple noise adaptation rates. Weighting logic applies the modified noise adaptation rates derived from the signal divided at a first frequency resolution to the signal divided at a second frequency resolution.
摘要翻译：增强系统改善了来自接收信号的噪声估计。该系统包括频谱监视器，其以一个以上的频率分辨率对信号的一部分进行分频。适应逻辑导出接收信号的噪声适配因子。多个设备跟踪接收信号中的估计噪声的特性并修改多个噪声自适应速率。加权逻辑将从以第一频率分辨率划分的信号导出的修改的噪声适应率应用于以第二频率分辨率划分的信号。

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