公开(公告)号：US08724828B2

公开(公告)日：2014-05-13

申请号：US13878621

申请日：2011-01-19

申请人： Satoru Furuta ,  Takashi Sudo ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Takashi Sudo ,  Hirohisa Tasaki

IPC分类号： H04B15/00

CPC分类号： H04R3/002 ,  G10L21/0232

摘要： A correction spectrum calculation unit 6 obtains a correction spectrum by smoothing an estimated noise spectrum in accordance with the degree of its variations, and a suppression quantity limiting coefficient calculation unit 7 decides a suppression quantity limiting coefficient from the correction spectrum. A suppression quantity calculation unit 9 obtains a suppression coefficient based on the suppression quantity limiting coefficient, and the spectrum suppression unit 10 carries out amplitude suppression of spectral components of an input signal.

摘要翻译： 校正频谱计算单元6通过根据其变化程度对估计的噪声频谱进行平滑来获得校正频谱，抑制量限制系数计算单元7根据校正频谱确定抑制量限制系数。 抑制量计算单元9基于抑制量限制系数获得抑制系数，并且频谱抑制单元10对输入信号的频谱分量进行幅度抑制。

公开(公告)号：US20130216058A1

公开(公告)日：2013-08-22

申请号：US13878621

申请日：2011-01-19

申请人： Satoru Furuta ,  Takashi Sudo ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Takashi Sudo ,  Hirohisa Tasaki

IPC分类号： H04R3/00

CPC分类号： H04R3/002 ,  G10L21/0232

摘要： A correction spectrum calculation unit 6 obtains a correction spectrum by smoothing an estimated noise spectrum in accordance with the degree of its variations, and a suppression quantity limiting coefficient calculation unit 7 decides a suppression quantity limiting coefficient from the correction spectrum. A suppression quantity calculation unit 9 obtains a suppression coefficient based on the suppression quantity limiting coefficient, and the spectrum suppression unit 10 carries out amplitude suppression of spectral components of an input signal.

摘要翻译： 校正频谱计算单元6通过根据其变化程度对估计的噪声频谱进行平滑来获得校正频谱，抑制量限制系数计算单元7根据校正频谱确定抑制量限制系数。 抑制量计算单元9基于抑制量限制系数获得抑制系数，并且频谱抑制单元10对输入信号的频谱分量进行幅度抑制。

公开(公告)号：US20130003987A1

公开(公告)日：2013-01-03

申请号：US13581544

申请日：2010-03-09

申请人： Satoru Furuta ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Hirohisa Tasaki

IPC分类号： H04B15/00

CPC分类号： G10L21/0208 ,  G10L21/0232 ,  G10L25/78 ,  G10L2021/02163

摘要： A band separating unit 5 carries out a band division of a plurality of power spectra into which an input signal is converted by a time-to-frequency converting unit 2 to combine power spectra into each subband, and a band representative component generating unit 6 defines a power spectrum having a maximum among the plurality of power spectra within each subband as a representative power spectrum. A noise suppression amount generating unit 7 calculates an amount of noise suppression for each subband by using the representative power spectrum and a noise spectrum, and a noise suppressing unit 9 suppresses the amplitudes of the power spectra according to the amount of noise suppression.

摘要翻译： 频带分离单元5对时频转换单元2对输入信号进行转换的多个功率谱进行频带分割，将功率谱组合成各子带，频带代表分量生成单元6定义 在每个子带内的多个功率谱中具有最大值的功率谱作为代表性功率谱。 噪声抑制量生成单元7通过使用代表性功率谱和噪声频谱来计算每个子带的噪声抑制量，噪声抑制单元9根据噪声抑制量来抑制功率谱的振幅。

公开(公告)号：US20110123045A1

公开(公告)日：2011-05-26

申请号：US13054589

申请日：2008-11-04

申请人： Hirohisa Tasaki ,  Satoru Furuta

发明人： Hirohisa Tasaki ,  Satoru Furuta

IPC分类号： H04B15/00

CPC分类号： G10L21/0208

摘要： A noise suppressor selects, for individual frequency components, maximums by comparing a plurality of noise suppressed spectra 105 and 106 a plurality of noise suppressing units 4 and 5 output, thereby obtaining an output spectrum 107 having the frequency components selected as its components. A first noise suppressing unit 4 generates a noise suppressed spectrum 105 by multiplying an input spectrum 102 by amplitude suppression gains, and makes the amplitude suppression gains greater than most of the amplitude suppression gains in a noise signal intervals of a second noise suppressing unit 5.

摘要翻译： 噪声抑制器通过比较多个噪声抑制频谱105和106输出多个噪声抑制单元4,5来选择单个频率分量的最大值，从而获得具有选择的频率分量作为其分量的输出频谱107。 第一噪声抑制单元4通过将输入频谱102乘以振幅抑制增益来产生噪声抑制频谱105，并且使得幅度抑制增益大于第二噪声抑制单元5的噪声信号间隔中的大部分幅度抑制增益。

公开(公告)号：US08762139B2

公开(公告)日：2014-06-24

申请号：US13814332

申请日：2010-09-21

申请人： Satoru Furuta ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Hirohisa Tasaki

IPC分类号： G10L21/00

CPC分类号： G10L21/02 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02085 ,  G10L2021/02168

摘要： A noise suppression device includes: a power spectrum calculator converting an input signal of time domain into power spectra of frequency domain; a voice/noise determination unit determining whether the power spectra indicate voice or noise; a noise spectrum estimation unit estimating noise spectra of the power spectra; a period component estimation unit analyzing a harmonic structure constituting the power spectra and estimating periodical information about the power spectra; a weighting coefficient calculator calculating a weighting coefficient for weighting the power spectra; a suppression coefficient calculator calculating a suppression coefficient for suppressing noise included in the power spectra; a spectrum suppression unit suppressing amplitude of the power spectra in accordance with the suppression coefficient; and an inverse Fourier transformer converting the power spectra output by the spectrum suppression unit into a signal of time domain to generate a noise-suppressed signal.

摘要翻译： 噪声抑制装置包括：功率谱计算器，将时域的输入信号转换为频域的功率谱; 语音/噪声确定单元，确定功率谱是否表示语音或噪声; 估计功率谱的噪声谱的噪声谱估计单元; 分析构成功率谱的谐波结构并估计关于功率谱的周期性信息的周期分量估计单元; 计算用于对功率谱进行加权的加权系数的加权系数计算器; 计算用于抑制包含在功率谱中的噪声的抑制系数的抑制系数计算器; 频谱抑制单元，根据抑制系数抑制功率谱的振幅; 以及将由频谱抑制单元输出的功率谱转换成时域的信号的逆傅里叶变换器，以产生噪声抑制信号。

公开(公告)号：US20130138434A1

公开(公告)日：2013-05-30

申请号：US13814332

申请日：2010-09-21

申请人： Satoru Furuta ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Hirohisa Tasaki

IPC分类号： G10L21/02

CPC分类号： G10L21/02 ,  G10L21/0208 ,  G10L21/0232 ,  G10L2021/02085 ,  G10L2021/02168

摘要： A noise suppression device includes: a power spectrum calculator converting an input signal of time domain into power spectra of frequency domain; a voice/noise determination unit determining whether the power spectra indicate voice or noise; a noise spectrum estimation unit estimating noise spectra of the power spectra; a period component estimation unit analyzing a harmonic structure constituting the power spectra and estimating periodical information about the power spectra; a weighting coefficient calculator calculating a weighting coefficient for weighting the power spectra; a suppression coefficient calculator calculating a suppression coefficient for suppressing noise included in the power spectra; a spectrum suppression unit suppressing amplitude of the power spectra in accordance with the suppression coefficient; and an inverse Fourier transformer converting the power spectra output by the spectrum suppression unit into a signal of time domain to generate a noise-suppressed signal.

摘要翻译： 噪声抑制装置包括：功率谱计算器，将时域的输入信号转换为频域的功率谱; 语音/噪声确定单元，确定功率谱是否表示语音或噪声; 估计功率谱的噪声谱的噪声谱估计单元; 分析构成功率谱的谐波结构并估计关于功率谱的周期性信息的周期分量估计单元; 计算用于对功率谱进行加权的加权系数的加权系数计算器; 计算用于抑制包含在功率谱中的噪声的抑制系数的抑制系数计算器; 频谱抑制单元，根据抑制系数抑制功率谱的振幅; 以及将由频谱抑制单元输出的功率谱转换成时域的信号的逆傅里叶变换器，以产生噪声抑制信号。

公开(公告)号：US08706497B2

公开(公告)日：2014-04-22

申请号：US13503497

申请日：2010-10-22

申请人： Satoru Furuta ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Hirohisa Tasaki

IPC分类号： G10L13/00

CPC分类号： G10L21/038

摘要： A synthesis filter 106 synthesizes a plurality of wide-band speech signals by combining wide-band phoneme signals and sound source signals from a speech signal code book 105, and a distortion evaluation unit 107 selects one of the wide-band speech signals with a minimum waveform distortion with respect to an up-sampled narrow-band speech signal output from a sampling conversion unit 101. A first bandpass filter 103 extracts a frequency component outside a narrow-band of the wide-band speech signal and a band synthesis unit 104 combines it with the up-sampled narrow-band speech signal.

摘要翻译： 合成滤波器106通过组合来自语音信号码本105的宽带音素信号和声源信号来合成多个宽带语音信号，失真评估单元107选择最小的宽带语音信号之一 相对于从采样转换单元101输出的上采样窄带语音信号的波形失真。第一带通滤波器103提取宽带语音信号的窄带外的频率分量，频带合成单元104组合 它与上采样的窄带语音信号。

公开(公告)号：US20120209611A1

公开(公告)日：2012-08-16

申请号：US13503497

申请日：2010-10-22

申请人： Satoru Furuta ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Hirohisa Tasaki

IPC分类号： G10L13/00

CPC分类号： G10L21/038

摘要： A synthesis filter 106 synthesizes a plurality of wide-band speech signals by combining wide-band phoneme signals and sound source signals from a speech signal code book 105, and a distortion evaluation unit 107 selects one of the wide-band speech signals with a minimum waveform distortion with respect to an up-sampled narrow-band speech signal output from a sampling conversion unit 101. A first bandpass filter 103 extracts a frequency component outside a narrow-band of the wide-band speech signal and a band synthesis unit 104 combines it with the up-sampled narrow-band speech signal.

摘要翻译： 合成滤波器106通过组合来自语音信号码本105的宽带音素信号和声源信号来合成多个宽带语音信号，失真评估单元107选择最小的宽带语音信号之一 相对于从采样转换单元101输出的上采样窄带语音信号的波形失真。第一带通滤波器103提取宽带语音信号的窄带外的频率分量，频带合成单元104组合 它与上采样的窄带语音信号。

公开(公告)号：US08989403B2

公开(公告)日：2015-03-24

申请号：US13581544

申请日：2010-03-09

申请人： Satoru Furuta ,  Hirohisa Tasaki

发明人： Satoru Furuta ,  Hirohisa Tasaki

IPC分类号： H04B15/00 ,  G10L21/0208 ,  G10L25/78 ,  G10L21/0216 ,  G10L21/0232

CPC分类号： G10L21/0208 ,  G10L21/0232 ,  G10L25/78 ,  G10L2021/02163

摘要： A band separating unit 5 carries out a band division of a plurality of power spectra into which an input signal is converted by a time-to-frequency converting unit 2 to combine power spectra into each subband, and a band representative component generating unit 6 defines a power spectrum having a maximum among the plurality of power spectra within each subband as a representative power spectrum. A noise suppression amount generating unit 7 calculates an amount of noise suppression for each subband by using the representative power spectrum and a noise spectrum, and a noise suppressing unit 9 suppresses the amplitudes of the power spectra according to the amount of noise suppression.

摘要翻译： 频带分离单元5对时频转换单元2对输入信号进行转换的多个功率谱进行频带分割，将功率谱组合成各子带，频带代表分量生成单元6定义 在每个子带内的多个功率谱中具有最大值的功率谱作为代表性功率谱。 噪声抑制量生成单元7通过使用代表性功率谱和噪声频谱来计算每个子带的噪声抑制量，噪声抑制单元9根据噪声抑制量来抑制功率谱的振幅。

公开(公告)号：US08737641B2

公开(公告)日：2014-05-27

申请号：US13054589

申请日：2008-11-04

申请人： Hirohisa Tasaki ,  Satoru Furuta

发明人： Hirohisa Tasaki ,  Satoru Furuta

IPC分类号： H04B15/00 ,  H04R25/00

CPC分类号： G10L21/0208

摘要： A noise suppressor selects, for individual frequency components, maximums by comparing a plurality of noise suppressed spectra 105 and 106 a plurality of noise suppressing units 4 and 5 output, thereby obtaining an output spectrum 107 having the frequency components selected as its components. A first noise suppressing unit 4 generates a noise suppressed spectrum 105 by multiplying an input spectrum 102 by amplitude suppression gains, and makes the amplitude suppression gains greater than most of the amplitude suppression gains in a noise signal intervals of a second noise suppressing unit 5.

摘要翻译： 噪声抑制器通过比较多个噪声抑制频谱105和106输出多个噪声抑制单元4,5来选择单个频率分量的最大值，从而获得具有选择的频率分量作为其分量的输出频谱107。 第一噪声抑制单元4通过将输入频谱102乘以振幅抑制增益来产生噪声抑制频谱105，并且使得幅度抑制增益大于第二噪声抑制单元5的噪声信号间隔中的大部分幅度抑制增益。