公开(公告)号：US07203641B2

公开(公告)日：2007-04-10

申请号：US10398808

申请日：2001-04-16

申请人： Hirohisa Tasaki

发明人： Hirohisa Tasaki

IPC分类号： G10L19/06

CPC分类号： G10L19/12 ,  G10L19/00

摘要： In order to achieve a speech encoding method and device of high quality, which are small in local occurrence of abnormal noise in decoded speech, the speech encoding method and device include: fixed excitation generating means 13 for generating a plurality of fixed excitations; a first distortion calculating portion 23 for calculating a distortion related to a waveform defined between a signal to be encoded which is obtained from the input speech and a synthetic vector which is obtained from the fixed excitation as a first distortion for each of the fixed excitations; a second distortion calculating portion 24 for calculating a second distortion different from the first distortion which is defined between the signal to be encoded and the synthetic vector determined from the fixed excitation for each of the fixed excitations; an evaluation value calculating portion 29 for calculating a given evaluation value for search by using the first distortion and the second distortion for each of the vectors; and searching means 20 for selecting the fixed excitation that minimizes the evaluation value for search and outputting a code which is associated with the selected fixed excitation in advance.

摘要翻译： 为了实现解码语音中局部出现异常噪声的高质量的语音编码方法和装置，语音编码方法和装置包括：固定激励发生装置13，用于产生多个固定兴奋; 第一失真计算部分23，用于计算与从输入语音获得的待编码信号和从固定激励获得的合成矢量之间定义的波形作为每个固定兴奋度的第一失真相关的失真; 第二失真计算部分24，用于计算与要编码的信号之间定义的第一失真不同于对于每个固定兴奋度从固定激励确定的合成向量的第二失真; 评估值计算部分29，用于通过使用每个矢量的第一失真和第二失真来计算用于搜索的给定评估值; 以及搜索装置20，用于选择使搜索的评估值最小化的固定激励，并且预先输出与所选择的固定激励相关联的代码。

公开(公告)号：US07006966B2

公开(公告)日：2006-02-28

申请号：US10083556

申请日：2002-02-27

申请人： Tadashi Yamaura ,  Hirohisa Tasaki

发明人： Tadashi Yamaura ,  Hirohisa Tasaki

IPC分类号： G10L19/12

CPC分类号： G10L19/12 ,  G10L2019/0007

摘要： The present invention comprises: first periodicity providing means for emphasizing periodicity of a fixed code vector output from at least one fixed excitation code book by use of a first periodicity emphasis coefficient adaptively determined based on a predetermined rule; and second periodicity providing means for emphasizing periodicity of a fixed code vector output from at least one fixed excitation code book by use of a predetermined second periodicity emphasis coefficient.

公开(公告)号：US06526378B1

公开(公告)日：2003-02-25

申请号：US09568127

申请日：2000-05-10

申请人： Hirohisa Tasaki

发明人： Hirohisa Tasaki

IPC分类号： G10L1904

CPC分类号： G10L21/0208

摘要： A method and an apparatus for processing a sound signal are provided, which process an input sound signal including degraded sound such as quantization noise so as to make the degraded sound subjectively unperceptible. A transformation strength controller calculates a spectrum of a decoded speech after perceptually weighting the decoded speech as the input sound signal, and calculates transformation strength based on the extent of the amplitude and the continuity of the spectrum. A signal transformer obtains a spectrum of the decoded speech, smoothes the amplitude and disturbs the phase based on the transformation strength, and the obtained signal is returned back to a signal region as a transformed decoded speech. A signal evaluator obtains background noise likeness by analyzing the decoded speech and the obtained value is made to be an addition control value. In the weighted value adder, when the addition control value appears to be the background noise likeness, the weight for adding to the decoded speech is reduced, the weight for adding to the transformed decoded speech is increased, and an output speech is obtained.

摘要翻译： 提供了一种用于处理声音信号的方法和装置，其处理包括诸如量化噪声的劣化声音的输入声音信号，以使主要不可感知的劣化声音。变换强度控制器在感知加权之后计算解码语音的频谱 解码语音作为输入声音信号，并且基于频谱的幅度和连续性的程度来计算变换强度。 信号变换器获得解码语音的频谱，平滑振幅并基于变换强度对相位进行干扰，并将获得的信号作为变换解码语音返回到信号区域。 信号评估器通过分析解码语音来获得背景噪声相似度，并将所获得的值作为相加控制值。 在加权值加法器中，当加法控制值看起来是背景噪声相似度时，加到解码语音的权重减小，增加到经变换的解码语音的加权，并获得输出语音。

公开(公告)号：US06496796B1

公开(公告)日：2002-12-17

申请号：US09620564

申请日：2000-07-20

申请人： Hirohisa Tasaki ,  Tadashi Yamaura

发明人： Hirohisa Tasaki ,  Tadashi Yamaura

IPC分类号： G10L1904

CPC分类号： G10L19/10 ,  G10L2019/0008

摘要： Drive sound source coding means, decoding means has a plurality of algebraic sound source coding means, decoding means having sound source position tables different in distribution lean of sound source position candidates in a frame, each algebraic sound source coding means, decoding means for referencing spectrum envelope information and coding the sound source of an input voice based on a sound source position selected from among the sound source position candidates in the sound source position table and a polarity and selection means for selecting the algebraic sound source coding means, decoding means with the smallest coding distortion from among the plurality of algebraic sound source coding means, decoding means and outputting code representing the drive sound source position output by the selected algebraic sound source coding means, and polarity.

摘要翻译： 驱动声源编码装置，解码装置具有多个代数声源编码装置，具有在帧中声源位置候选的分布偏差不同的声源位置表的解码装置，每个代数声源编码装置，用于参考频谱的解码装置 基于从声源位置表中的声源位置候选中选择的声源位置对输入声音的声源进行编码，以及极性和选择装置，用于选择代数声源编码装置，解码装置具有 多个代数声源编码装置中的最小编码失真，解码装置和输出代表所选代数声源编码装置输出的驱动声源位置的代码和极性。

公开(公告)号：US5864794A

公开(公告)日：1999-01-26

申请号：US947765

申请日：1997-10-09

申请人： Hirohisa Tasaki

发明人： Hirohisa Tasaki

IPC分类号： G10L11/00 ,  G10L19/00 ,  G10L19/02 ,  G10L21/02 ,  G01L3/00

CPC分类号： G10L19/02 ,  G10L19/0208 ,  G10L19/0212 ,  G10L2021/02168 ,  G10L21/0232 ,  G10L21/0264 ,  G10L25/27

摘要： A signal encoding system A1 includes a bark spectrum calculating device 2 for calculating a bark spectrum as a parameter based on an auditory model, a bark spectrum encoding device 3 for encoding the bark spectrum, a sound source calculating device 4 and a sound source encoding device 5. The bark spectrum calculating device 2 includes a power spectrum calculating device 6, a critical band integrating device 7, an equal loudness compensating device 8 and a loudness converting device 9. These devices are formed by engineering the functions and effects which are similar to those of the auditory model. The decoding process perform the conversion in the opposite direction. As a result, the signals can be encoded and decoded through less calculation in a manner well matching the human auditory characteristics. When speech signals are to be encoded, it can be realized through less calculation and memory while suppressing noise components other than the speech signal.

摘要翻译： 信号编码系统A1包括：基于听觉模型计算树皮谱作为参数的树皮谱计算装置2，用于编码树皮光谱的树皮光谱编码装置3，声源计算装置4和声源编码装置 树皮光谱计算装置2包括功率谱计算装置6，临界频带积分装置7，相等的响度补偿装置8和响度转换装置9.这些装置通过工程来形成，其功能和效果类似于 那些听觉模型。 解码过程在相反的方向进行转换。 结果，可以以与人的听觉特征良好匹配的方式通过较少的计算来对信号进行编码和解码。 当要编码语音信号时，可以通过较少的计算和存储来实现，同时抑制语音信号以外的噪声分量。

公开(公告)号：US09178479B2

公开(公告)日：2015-11-03

申请号：US14122482

申请日：2011-09-15

申请人： Masaru Kimura ,  Hirohisa Tasaki

发明人： Masaru Kimura ,  Hirohisa Tasaki

IPC分类号： H03G3/00 ,  H03G3/20 ,  H03G5/00 ,  H03G5/16 ,  G10L21/02

CPC分类号： H03G3/20 ,  G10L21/02 ,  H03G5/005 ,  H03G5/165

摘要： Filters 106-1-106-N divide an input signal 100 into N band-limited signals 107-1-107-N, and multipliers 108-1-108-N carry out dynamic range control of the N band-limited signals 107-1-107-N, respectively. After that, filters 111-1-111-N eliminate odd harmonics caused by the dynamic range control, and a signal synthesis unit 113 combines the signals passing through the filters 111-1-111-N into a single output signal 114.

摘要翻译： 滤波器106-1-106-N将输入信号100划分为N个频带限制信号107-1-107-N，并且乘法器108-1-108-N对N个频带限制信号107-1-107-N进行动态范围控制， 1-107-N。 之后，滤波器111-1-111-N消除由动态范围控制引起的奇次谐波，信号合成单元113将通过滤波器111-1-111-N的信号组合成单个输出信号114。

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：US07756698B2

公开(公告)日：2010-07-13

申请号：US11907922

申请日：2007-10-18

申请人： Hirohisa Tasaki

发明人： Hirohisa Tasaki

IPC分类号： G10L19/02 ,  H04J7/00

CPC分类号： H04B1/667 ,  G10L19/167

摘要： A sound encoder multiplexes a plurality of codes into a sound code in an order determined by a multiplexing order determination unit (12), and a sound decoder demultiplexes the sound code into a plurality of codes one by one in an order determined by a demultiplexing order determination unit (14).

摘要翻译： 声音编码器以由多路复用顺序确定单元（12）确定的顺序将多个代码复用到声码中，并且声音解码器按照解复用顺序确定的顺序将声码逐个解复用为多个码 确定单元（14）。

公开(公告)号：US07454328B2

公开(公告)日：2008-11-18

申请号：US10433354

申请日：2001-04-26

申请人： Tadashi Yamaura ,  Hirohisa Tasaki

发明人： Tadashi Yamaura ,  Hirohisa Tasaki

IPC分类号： G10L19/00 ,  G10L19/04 ,  G10L19/12 ,  G10L21/02

CPC分类号： G10L19/12 ,  G10L2019/0005

摘要： A speech encoding apparatus calculates encoding distortion of a noise-like fixed code vector and multiplies the encoding distortion by a fixed weight corresponding to the noise-like degree of the noise-like fixed code vector, calculates encoding distortion of a non-noise-like fixed code vector and multiplies the encoding distortion by a fixed weight corresponding to the non-noise-like fixed code vector, and selects the fixed excitation code associated with multiplication result with a smaller value.

摘要翻译： 语音编码装置计算噪声状固定码矢量的编码失真，并将编码失真乘以与类噪声固定码矢量的噪声等级对应的固定权重，计算非噪声固定码矢量的编码失真 固定码矢量，将编码失真乘以与非噪声固定码矢量对应的固定权重，并选择与乘法结果相关联的固定激励码较小的值。