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公开(公告)号：US06931138B2
公开(公告)日：2005-08-16
申请号：US09983284
申请日：2001-10-23
CPC分类号： H04R3/005 , H04R1/406 , H04R2201/401 , H04R2201/403
摘要： A pickup section transduces sounds to audio signals. A zoom control section outputs a zoom position signal corresponding to a zoom position. A directivity control section alters the directivity characteristics under a telescopic operation so as to mainly pick up sounds coming from a frontal direction with an enhancement which is in accordance with the zoom position signal, thereby outputting an R channel audio signal and an L channel audio signal. In accordance with the zoom position signal, a noise suppression section applies a greater degree of suppression to the background noise contained in the respective channel audio signals under the telescopic operation than under a wide-angle operation. As a result, a target sound from a remote location can be picked up with a sufficient enhancement in accordance with the zoom position under the telescopic operation.
摘要翻译： 拾音部分将声音转换为音频信号。 变焦控制部输出与变焦位置对应的变焦位置信号。 指向性控制部分在伸缩操作下改变方向性特征，主要从正面方向拾取声音，并且具有与变焦位置信号相应的增强，从而输出R声道音频信号和L声道音频信号 。 根据变焦位置信号，噪声抑制部分对于在伸缩操作下的相应声道音频信号中包含的背景噪声比在广角操作下更大程度的抑制。 结果，可以根据伸缩操作下的变焦位置以足够的增强来拾取来自远程位置的目标声音。
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公开(公告)号：US07577262B2
公开(公告)日：2009-08-18
申请号：US10714857
申请日：2003-11-18
IPC分类号： H04B15/00
CPC分类号： H04R3/005 , H04R2410/01 , H04R2410/05
摘要： A signal generating section generates a main signal and a noise reference signal. A determining section determines whether a level ratio is larger than a predetermined value. An adaptive filter section generates a signal indicative of a signal component of a target sound included in the noise reference signal generated by the signal generating section, and learns a filter coefficient only when the determining section determines that the level ratio is larger than the predetermined value. A subtracting section subtracts the signal generated by the adaptive filter section from the noise reference signal. A noise suppressing section suppresses a signal component of noise included in the main signal by using the main signal and the noise reference signal after subtraction by the subtracting section.
摘要翻译： 信号产生部分产生主信号和噪声参考信号。 确定部分确定电平比是否大于预定值。 自适应滤波器部分产生指示由信号产生部分生成的噪声参考信号中包括的目标声音的信号分量的信号，并且仅在确定部分确定电平比大于预定值时才学习滤波器系数 。 减法部从噪声参考信号中减去由自适应滤波器部分产生的信号。 噪声抑制部分通过减法部分减去后的主信号和噪声参考信号来抑制包含在主信号中的噪声的信号分量。
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公开(公告)号：US20080021703A1
公开(公告)日：2008-01-24
申请号：US11579133
申请日：2005-06-15
申请人： Takashi Kawamura , Takeo Kanamori
发明人： Takashi Kawamura , Takeo Kanamori
IPC分类号： H04R3/02
摘要： A howling detection device detects a dominance ratio, which indicates a risk of howling to be occurred when a mixed signal obtained by a sound mixing section for mixing a plurality of sound signals respectively collected by a plurality of microphones is outputted by a speaker, for each of the sound signals. The howling detection device includes a level detecting section for respectively detecting levels of the plurality of sound signals, a word ending detecting section for comparing, in a same time domain, the mixed signal with a signal regarding a sound to be outputted by the speaker as a noise reference signal, and detecting a time period, as a word ending section, during which the mixed signal is inputted after the noise reference signal falls, and a dominance ratio calculating section for extracting only any of the levels corresponding to the word ending section from among the levels, of the plurality of sound signals, detected by the level detecting section, and calculating, as a dominance ratio, a ratio of each of the levels of each of the sound signals to a sum of the levels of the plurality of sound signals.
摘要翻译： 吵音检测装置检测优势比，其表示当由扬声器输出由扬声器输出由用于混合由多个麦克风分别收集的多个声音信号的声音混合部分获得的混合信号时发生啸声的风险 的声音信号。 啸声检测装置包括用于分别检测多个声音信号的电平的电平检测部分，一个字尾结束检测部分，用于将混合信号与扬声器输出的声音相关的信号在同一时域中进行比较 噪声参考信号，并且检测在噪声参考信号下降之后输入混合信号的时间段作为字结束部分，以及优势比计算部分，用于仅提取与字结束部分相对应的任何电平 从电平检测部检测到的多个声音信号的电平之中，计算出每个声音信号的每个电平与多个声音信号的电平之和作为优势比， 声音信号。
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公开(公告)号：US07912230B2
公开(公告)日：2011-03-22
申请号：US11579133
申请日：2005-06-15
申请人： Takashi Kawamura , Takeo Kanamori
发明人： Takashi Kawamura , Takeo Kanamori
摘要： A howling detection device detects a dominance ratio, which indicates a risk of howling to occur when a mixed signal obtained by mixing a plurality of sound signals collected by a plurality of microphones is outputted by a speaker. The howling detection device detects levels of the plurality of sound signals, compares, in a same time domain, the mixed signal with a signal regarding a sound to be outputted by the speaker as a noise reference signal, detects a time period, as a word ending section, during which the mixed signal is inputted after the noise reference signal falls, and calculates a dominance ratio by extracting only a level of the plurality of sound signals corresponding to the word ending section and determining a ratio of each of the extracted levels of each of the sound signals to a sum of the extracted levels of the plurality of sound signals.
摘要翻译： 当通过由扬声器输出通过混合由多个麦克风采集的多个声音信号而获得的混合信号时，啸叫检测装置检测优势比，其表示啸叫发生的风险。 啸声检测装置检测多个声音信号的电平，将混合信号与由扬声器输出的声音相关的信号作为噪声参考信号进行比较，将时间段作为一个字 结束部分，其中混合信号在噪声参考信号下降之后被输入，并且通过仅提取对应于字结束部分的多个声音信号的电平来计算优势比，并且确定每个提取电平的比率 声音信号中的每一个与所提取的多个声音信号的电平之和。
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5.发明授权Howling suppression device, program, integrated circuit, and howling suppression method 有权啸声抑制装置，程序，集成电路和啸叫抑制方法公开(公告)号：US07760888B2
公开(公告)日：2010-07-20
申请号：US10585479
申请日：2005-06-07
摘要： Howling, which occurs when amplifying a target sound collected by a first microphone through an amplification section and outputting the amplified sound as an intensified sound from a loudspeaker, is suppressed using a first and second acoustic signal. A first power spectrum is produced according to the first acoustic signal output from the first microphone collecting a sound. A second power spectrum is produced according to the second acoustic signal of a sound including at least the intensified sound and not including the target sound. Then, the first acoustic signal is filtered based on the first power spectrum, and the second power spectrum to output only an acoustic signal of the target sound to the amplification section.
摘要翻译： 当通过放大部分放大由第一麦克风收集的目标声音并且将放大的声音作为来自扬声器的增强声音输出时发生的嚎叫被使用第一和第二声音信号抑制。 根据从第一麦克风输出的收集声音的第一声信号产生第一功率谱。 根据包括至少强化声音并且不包括目标声音的声音的第二声信号产生第二功率谱。 然后，第一声信号基于第一功率谱进行滤波，第二功率谱仅将目标声音的声信号输出到放大部。
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6.发明申请Howling Suppression Device, Program, Integrated Circuit, and Howling Suppression Method 有权啸声抑制装置，程序，集成电路和啸声抑制方法公开(公告)号：US20080285774A1
公开(公告)日：2008-11-20
申请号：US10585479
申请日：2005-06-07
摘要： Howling, which occurs when amplifying a target sound collected by a first microphone through an amplification section and outputting the amplified sound as an intensified sound from a loudspeaker, is suppressed. A first power spectrum is produced according to a first acoustic signal output from the first microphone collecting a sound. A second power spectrum is produced according to a second acoustic signal of a sound including at least the intensified sound and not including the target sound. Then, the first acoustic signal is filtered based on the first power spectrum and the second power spectrum to output only an acoustic signal of the target sound to the amplification section.
摘要翻译： 当通过放大部分放大由第一麦克风收集的目标声音并且将放大的声音作为来自扬声器的增强声音输出时发生的啸声被抑制。 根据从第一麦克风输出的收集声音的第一声信号产生第一功率谱。 根据包括至少强化声音并且不包括目标声音的声音的第二声信号产生第二功率谱。 然后，基于第一功率谱和第二功率谱对第一声信号进行滤波，以仅将目标声音的声信号输出到放大部。
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公开(公告)号：US20060053003A1
公开(公告)日：2006-03-09
申请号：US10542931
申请日：2004-06-03
申请人： Tetsu Suzuki , Takeo Kanamori , Takashi Kawamura
发明人： Tetsu Suzuki , Takeo Kanamori , Takashi Kawamura
IPC分类号： G10L19/00
CPC分类号： G10L25/78 , G10L2025/932 , G10L2025/937
摘要： There is provided a harmonic structure acoustic signal detection device not depending on the level fluctuation of the input signal, having an excellent real time property and noise resistance. The device includes: an FFT unit (200) which performs FFT on an input signal and calculates a power spectrum component for each frame; a harmonic structure extraction unit (201) which leaves only a harmonic structure from the power spectrum component; a voiced feature evaluation unit (210) which evaluates correlation between the frames of harmonic structures extracted by the harmonic structure extraction unit (201), thereby evaluates whether or not the segment is a vowel segment, and extracts the voiced segment; and a speech segment determination unit (205) which determines a speech segment according to the continuity and durability of the output of the voiced feature evaluation unit (210).
摘要翻译： 提供了不依赖于输入信号的电平波动的谐波结构声信号检测装置，具有优异的实时性和抗噪声性。 该装置包括：FFT单元（200），对输入信号执行FFT，并计算每帧的功率谱分量; 谐波结构提取单元，其仅留下来自功率谱分量的谐波结构; 声音特征评估单元，其评估由所述谐波结构提取单元（201）提取的谐波结构的帧之间的相关性，从而评估所述段是否是元音段，并且提取所述有声段; 以及语音段确定单元，其根据所述有声特征评估单元的输出的连续性和耐久性来确定语音段。
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公开(公告)号：US06665645B1
公开(公告)日：2003-12-16
申请号：US09627071
申请日：2000-07-27
申请人： Satoru Ibaraki , Takeo Kanamori , Takashi Kawamura , Mikio Oda
发明人： Satoru Ibaraki , Takeo Kanamori , Takashi Kawamura , Mikio Oda
IPC分类号： G10L1102
CPC分类号： G10L15/20 , G10L2021/02082 , G10L2021/02161
摘要： A low-cost speech recognition apparatus for AV equipment capable of speech recognition with high accuracy while 2-channel sound is being produced from loudspeakers is achieved. A monaural conversion part converts 2-channel signals to be inputted to the loudspeakers into a monaural signal. A single echo canceller is provided with an output from a microphone and an output from the monaural conversion part (monaural signal). The echo canceller estimates an echo of multichannel sound based on the monaural signal, and then eliminates the echo sound from the microphone output. Thus, with only a single echo canceller, speech recognition can be carried out while 2-channel sound is being produced from the loudspeakers. Moreover, unlike the case where two echo cancellers are provided, the present invention can prevent the occurrence of mutual interference between the echo cancellers that leads to deterioration in speech recognition performance.
摘要翻译： 实现了一种用于AV设备的低成本语音识别装置，其能够在从扬声器产生2声道声音的同时以高精度进行语音识别。 单声道转换部分将要输入到扬声器的2声道信号转换为单声道信号。 单个回声消除器具有来自麦克风的输出和来自单声道转换部分（单声道信号）的输出。 回声消除器基于单声道信号估计多声道声音的回波，然后消除来自麦克风输出的回声。 因此，仅使用单个回声消除器，可以在从扬声器产生2声道声音的同时进行语音识别。 此外，与提供两个回波消除器的情况不同，本发明可以防止导致语音识别性能劣化的回波消除器之间的相互干扰的发生。
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9.发明授权Harmonic structure based acoustic speech interval detection method and device 有权基于谐波结构的声学语音间隔检测方法及装置公开(公告)号：US07567900B2
公开(公告)日：2009-07-28
申请号：US10542931
申请日：2004-06-03
申请人： Tetsu Suzuki , Takeo Kanamori , Takashi Kawamura
发明人： Tetsu Suzuki , Takeo Kanamori , Takashi Kawamura
CPC分类号： G10L25/78 , G10L2025/932 , G10L2025/937
摘要： A harmonic structure acoustic signal detection device not depending on the level fluctuation of the input signal including: an FFT unit which performs FFT on an input signal and calculates a power spectrum component for each frame; a harmonic structure extraction unit which leaves only a harmonic structure from the power spectrum component; a voiced feature evaluation unit which evaluates correlation between the frames of harmonic structures extracted by the harmonic structure extraction unit, thereby evaluates whether or not the segment is a vowel segment, and extracts the voiced segment; and a speech segment determination unit which determines a speech segment according to the continuity and durability of the output of the voiced feature evaluation unit.
摘要翻译： 一种谐波结构声信号检测装置，其不依赖于输入信号的电平波动，包括：FFT单元，对输入信号执行FFT并计算每帧的功率谱分量; 谐波结构提取单元，仅从功率谱分量中留下谐波结构; 声音特征评估单元，其评估由所述谐波结构提取单元提取的谐波结构的相关性，从而评估所述段是否是元音段，并且提取所述有声段; 以及语音段确定单元，其根据有声特征评估单元的输出的连续性和耐久性来确定语音段。
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公开(公告)号：US06639986B2
公开(公告)日：2003-10-28
申请号：US09334493
申请日：1999-06-16
申请人： Takeo Kanamori , Takashi Kawamura , Satoru Ibaraki
发明人： Takeo Kanamori , Takashi Kawamura , Satoru Ibaraki
IPC分类号： H04B1500
CPC分类号： H04R3/005
摘要： A built-in microphone device for use in an apparatus having a mechanism section generating internal noise inside a housing of the apparatus includes a main microphone for picking up an external sound; a noise reference microphone for picking up the internal noise; an adaptive filter member for generating a control audio signal based on an output signal from the noise reference microphone using a filter coefficient; a signal subtraction section for subtracting the control audio signal generated by the adaptive filter member from an output signal from the main microphone to generate a subtraction result; and a filter coefficient update control section for receiving an operation signal generated at the time of an operation of the mechanism section, and in response to the operation signal, updating the filter coefficient of the adaptive filter member based on the subtraction result generated by the signal subtraction section and an output signal from the noise reference microphone.
摘要翻译： 一种内置的麦克风装置，用于具有在该装置的壳体内产生内部噪声的机构部分的装置，包括用于拾取外部声音的主麦克风; 用于拾取内部噪声的噪声参考麦克风; 自适应滤波器构件，用于使用滤波器系数基于来自噪声参考麦克风的输出信号生成控制音频信号; 信号减法部分，用于从主麦克风的输出信号中减去由自适应滤波器部件产生的控制音频信号以产生减法结果; 以及滤波器系数更新控制部分，用于接收在机构部分的操作时产生的操作信号，并且响应于操作信号，基于由信号产生的减法结果来更新自适应滤波器部件的滤波器系数 减法部分和来自噪声参考麦克风的输出信号。
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