公开(公告)号：US08019614B2

公开(公告)日：2011-09-13

申请号：US12065378

申请日：2006-08-31

申请人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono ,  Tomokazu Ishikawa

发明人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono ,  Tomokazu Ishikawa

IPC分类号： G10L19/00

CPC分类号： G10L19/26 ,  G10L19/008 ,  G10L19/0204 ,  H04S2420/03

摘要： A temporal processing apparatus includes: a splitter splitting an audio signal, included in the sub-band domain, into diffuse signals indicating reverberating components and direct signals indicating non-reverberating components; a downmix unit generating a downmix signal by downmixing the direct signals; BPFs respectively generating a bandpass downmix signal and bandpass diffuse signals; normalization processing units respectively generating a normalized downmix signal and normalized diffuse signals; a scale computation processing unit computing, on a predetermined time slot basis, a scale factor indicating the magnitude of energy of the normalized downmix signal with respect to energy of the normalized diffuse signals; a calculating unit generating scale diffuse signals; a HPF generating high-pass diffuse signals; an adding unit generating addition signals; and a synthesis filter bank performing synthesis filter processing on the addition signals and transforming the addition signals into the time domains.

摘要翻译： 时间处理装置包括：分离器，将包括在子带域中的音频信号分成指示混响分量的漫射信号和指示非混响分量的直接信号; 下混合单元，通过使直接信号下混合来产生降混信号; BPF分别产生带通下混信号和带通漫射信号; 归一化处理单元，分别产生归一化的下混信号和归一化扩散信号; 比例计算处理单元在预定时隙的基础上计算指示归一化的下混信号相对于归一化扩散信号的能量的能量的大小的比例因子; 计算单元，生成缩放漫射信号; HPF产生高通漫反射信号; 添加单元生成附加信号; 以及合成滤波器组，对加法信号执行合成滤波处理，并将加法信号转换成时域。

公开(公告)号：US08184817B2

公开(公告)日：2012-05-22

申请号：US12064975

申请日：2006-07-07

申请人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

发明人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

IPC分类号： H03G3/00

CPC分类号： G10L19/008 ,  G10L2021/02082

摘要： Provided is a multi-channel acoustic signal processing device by which loads of arithmetic operations are reduced. The multi-channel acoustic signal processing device includes: a decorrelated signal generation unit, and a matrix operation unit and a third arithmetic unit. The decorrelated signal generation unit generates a decorrelated signal w′ indicating a sound which includes a sound indicated by an input signal x and reverberation, by performing reverberation processing on the input signal x. The matrix operation unit and the third arithmetic unit generate audio signals of m channels, by performing arithmetic operation on the input signal x and the decorrelated signal w′ generated by the decorrelated signal generation unit, using a matrix R3 which indicates distribution of a signal intensity level and distribution of reverberation.

摘要翻译： 提供了一种减少算术运算负载的多声道声信号处理装置。 多声道声信号处理装置包括：去相关信号生成单元，矩阵运算单元和第三运算单元。 去相关信号生成单元通过对输入信号x进行混响处理，生成表示包含由输入信号x表示的声音和混响的声音的解相关信号w'。 矩阵运算单元和第三运算单元通过使用表示信号强度分布的矩阵R3对输入信号x和解相关信号生成单元生成的去相关信号w'进行算术运算，生成m声道的音频信号 水平和分布的混响。

公开(公告)号：US20090262949A1

公开(公告)日：2009-10-22

申请号：US12064975

申请日：2006-07-07

申请人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

发明人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

IPC分类号： H03G3/00

CPC分类号： G10L19/008 ,  G10L2021/02082

摘要： Provided is a multi-channel acoustic signal processing device by which loads of arithmetic operations are reduced. The multi-channel acoustic signal processing device (100) includes: a decorrelated signal generation unit (181), and a matrix operation unit (187) and a third arithmetic unit (186). The decorrelated signal generation unit (181) generates a decorrelated signal w′ indicating a sound which includes a sound indicated by an input signal x and reverberation, by performing reverberation processing on the input signal x. The matrix operation unit (187) and the third arithmetic unit (186) generate audio signals of m channels, by performing arithmetic operation on the input signal x and the decorrelated signal w′ generated by the decorrelated signal generation unit (181), using a matrix R3 which indicates distribution of a signal intensity level and distribution of reverberation.

摘要翻译： 提供了一种减少算术运算负载的多声道声信号处理装置。 多通道声信号处理装置（100）包括：解相关信号生成部（181），矩阵运算部（187）和第三运算部（186）。 解相关信号生成单元（181）通过对输入信号x进行混响处理，生成表示包含由输入信号x表示的声音和混响的声音的解相关信号w'。 矩阵运算单元（187）和第三运算单元（186）通过对输入信号x进行算术运算和由解相关信号生成单元（181）生成的去相关信号w'，使用 矩阵R3，其指示信号强度水平的分布和混响的分布。

公开(公告)号：US20090240503A1

公开(公告)日：2009-09-24

申请号：US12066618

申请日：2006-10-03

申请人： Shuji Miyasaka ,  Yoshiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono ,  Kok Seng Chong

发明人： Shuji Miyasaka ,  Yoshiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono ,  Kok Seng Chong

IPC分类号： G10L21/00

CPC分类号： H04S3/02 ,  G10L19/008 ,  H04S2420/03

摘要： To provide an acoustic signal processing apparatus which can reduce the amount of calculation in matrix arithmetic.An acoustic signal processing apparatus (24) converts down-mixed acoustic signals of NI channels to acoustic signals of NO channels, where NO>NI. The acoustic signal processing apparatus includes: a first matrix arithmetic unit (241) for performing arithmetic on a matrix with K rows and NI columns, where NO>K≧NI, for the down-mixed acoustic signals of the NI channels, and outputting K signals obtained after the matrix arithmetic; K decorrelation units (242, 243) for generating signals incoherent, in terms of time characteristics, with the signals obtained after the matrix arithmetic, while maintaining frequency characteristics of the signals obtained after the matrix arithmetic; and a second matrix arithmetic unit (244) for performing arithmetic on a matrix with NO rows and (NI+K) columns for the down-mixed acoustic signals of the NI channels and for the K incoherent signals, and outputting the acoustic signals of the NO channels.

摘要翻译： 提供可以减少矩阵运算中的计算量的声信号处理装置。 声信号处理装置（24）将NI信道的混合声信号转换为NO信道的声信号，其中NO> NI。 声信号处理装置包括：第一矩阵运算单元，用于对NI通道的下混合声信号执行具有K行和NI列的矩阵的运算，其中NO> K> = NI，并输出 矩阵运算后得到的K信号; K去相关单元（242,243），用于在时间特性方面产生与矩阵运算之后获得的信号不相干的信号，同时保持在矩阵运算之后获得的信号的频率特性; 以及第二矩阵运算单元（244），用于对具有NO行和（NI + K）列的矩阵执行用于NI信道的下混合声信号和K个非相干信号的运算，并且输出 无通道。

公开(公告)号：US08073703B2

公开(公告)日：2011-12-06

申请号：US12066618

申请日：2006-10-03

申请人： Shuji Miyasaka ,  Yoshiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono ,  Kok Seng Chong

发明人： Shuji Miyasaka ,  Yoshiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono ,  Kok Seng Chong

IPC分类号： G10L19/00

CPC分类号： H04S3/02 ,  G10L19/008 ,  H04S2420/03

摘要： To provide an acoustic signal processing apparatus which can reduce the amount of calculation in matrix arithmetic. An acoustic signal processing apparatus converts down-mixed acoustic signals of NI channels to acoustic signals of NO channels, where NO>NI. The acoustic signal processing apparatus includes: a first matrix arithmetic unit for performing arithmetic on a matrix with K rows and NI columns, where NO>K≧NI, for the down-mixed acoustic signals of the NI channels, and outputting K signals obtained after the matrix arithmetic; K decorrelation units for generating signals incoherent, in terms of time characteristics, with the signals obtained after the matrix arithmetic, while maintaining frequency characteristics of the signals obtained after the matrix arithmetic; and a second matrix arithmetic unit for performing arithmetic on a matrix with NO rows and (NI+K) columns for the down-mixed acoustic signals of the NI channels and for the K incoherent signals, and outputting the acoustic signals of the NO channels.

摘要翻译： 提供可以减少矩阵运算中的计算量的声信号处理装置。 声信号处理装置将NI通道的混合声信号转换为NO信道的声信号，其中NO> NI。 声信号处理装置包括：第一矩阵运算单元，用于对NI通道的下混合声信号执行具有K行和NI列的矩阵的运算，其中NO>K≥NI，并且输出在以后获得的K信号 矩阵算术; K去相关单元，用于在时间特性方面产生与矩阵运算后获得的信号不相干的信号，同时保持矩阵运算后获得的信号的频率特性; 以及第二矩阵运算单元，用于对具有NO行和（NI + K）列的矩阵执行用于NI信道的下混合声信号和K个非相干信号的运算，并输出NO信道的声信号。

公开(公告)号：US20090234657A1

公开(公告)日：2009-09-17

申请号：US12065378

申请日：2006-08-31

申请人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono ,  Tomokazu Ishikawa

发明人： Yoshiaki Takagi ,  Kok Seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono ,  Tomokazu Ishikawa

IPC分类号： G10L21/00

CPC分类号： G10L19/26 ,  G10L19/008 ,  G10L19/0204 ,  H04S2420/03

摘要： A temporal processing apparatus (energy shaping apparatus) (600a) includes: a splitter (601) splitting an audio signal, included in the sub-band domain, which are obtained through a hybrid time and frequency transformation into diffuse signals indicating reverberating components and direct signals indicating non-reverberating components; a downmix unit (604) generating a downmix signal by downmixing the direct signals; BPFs (605 and 606) respectively generating a bandpass downmix signal and bandpass diffuse signals, by performing bandpass processing on the downmix signal and the diffuse signals on a sub-band-to-sub-band basis, which are split on the sub-band basis; normalization processing units (607 and 608) respectively generating a normalized downmix signal and normalized diffuse signals by normalizing the bandpass downmix signal and the bandpass diffuse signals with regard to respective energy; a scale computation processing unit (609) computing, on a predetermined time slot basis, a scale factor indicating the magnitude of energy of the normalized downmix signal with respect to energy of the normalized diffuse signals; a calculating unit (611) generating scale diffuse signals by multiplying the normalized diffuse signals by the scale factor; a HPF (612) generating high-pass diffuse signals by performing high-pass processing on the scale diffuse signals; an adding unit (613) generating addition signals by adding the high-pass diffuse signals and the direct signals; and a synthesis filter bank (614) performing synthesis filter processing on the addition signals and transforming the addition signals into the time domains

摘要翻译： 时间处理装置（能量整形装置）（600a）包括：分离器（601），将包括在子带域中的音频信号（通过混合时间和频率变换获得）分解成指示混响分量的漫射信号，并且直接 表示非混响分量的信号; 下混合单元（604），通过将所述直接信号进行下混合来产生下混合信号; BPF（605和606）分别产生带通下混合信号和带通扩散信号，通过对分频在子带上的下混信号和扩频信号进行带通处理，分散在子带 基础; 归一化处理单元（607和608），分别通过相对于各自的能量归一化带通下混合信号和带通漫射信号来产生归一化的下混合信号和归一化的扩散信号; 比例计算处理单元（609）在预定时隙的基础上计算指示归一化的下混合信号相对于归一化扩散信号的能量的能量的大小的比例因子; 计算单元（611），通过将归一化扩散信号乘以比例因子来生成缩放漫射信号; HPF（612）通过对刻度扩散信号进行高通处理来产生高通漫反射信号; 加法单元（613），通过加上高通漫反射信号和直接信号来产生加法信号; 以及合成滤波器组（614）对加法信号执行合成滤波处理，并将加法信号转换成时域

公开(公告)号：US07860721B2

公开(公告)日：2010-12-28

申请号：US11597558

申请日：2005-09-13

申请人： Mineo Tsushima ,  Yoshiaki Takagi ,  Kojiro Ono ,  Naoya Tanaka ,  Shuji Miyasaka

发明人： Mineo Tsushima ,  Yoshiaki Takagi ,  Kojiro Ono ,  Naoya Tanaka ,  Shuji Miyasaka

IPC分类号： G10L19/00

CPC分类号： G10L19/0208 ,  G10L19/008

摘要： Provided are an audio encoding device and an audio decoding device, by which optimal trade-off between code rates and sound quality can be flexibly adjusted. A variable frequency segmentation encoding unit includes: difference degree calculation units for calculating a difference degree between first and second input signals depending on a segmentation method for segmenting a frequency band into sub-bands; a selection unit for selecting one of the segmentation methods; and a difference degree and segmentation information encoding unit for encoding the selected method and the difference degree for each sub-band. A variable frequency segment decoding unit includes: a segmentation information decoding unit for decoding the segmentation information to learn the segmentation method; a switching unit for outputting a difference degree code corresponding to the segmentation method; and difference degree decoding units for decoding the difference degree code to the difference degree for each sub-band.

摘要翻译： 提供了一种音频编码装置和音频解码装置，可以灵活地调整码率和声音质量之间的最佳权衡。 可变频率分割编码单元包括：差分度计算单元，用于根据用于将频带分割为子带的分割方法计算第一和第二输入信号之间的差值; 选择单元，用于选择所述分割方法之一; 以及差分度和分割信息编码单元，用于对所选择的方法和每个子带的差分度进行编码。 可变频段解码单元包括：分割信息解码单元，用于对分割信息进行解码以学习分割方法; 切换单元，用于输出与分割方法对应的差分度码; 以及差分度解码单元，用于将差分度码解码为每个子带的差分度。

公开(公告)号：US20080059203A1

公开(公告)日：2008-03-06

申请号：US11597558

申请日：2005-09-13

申请人： Mineo Tsushima ,  Yoshiaki Takagi ,  Kojiro Ono ,  Naoya Tanaka ,  Shuji Miyasaka

发明人： Mineo Tsushima ,  Yoshiaki Takagi ,  Kojiro Ono ,  Naoya Tanaka ,  Shuji Miyasaka

IPC分类号： G10L19/00

CPC分类号： G10L19/0208 ,  G10L19/008

摘要： Provided are an audio encoding device and an audio decoding device, by which optimal trade-off between code rates and sound quality can be flexibly adjusted. A variable frequency segmentation encoding unit (110) has: difference degree calculation units (101, 102, and 103) for calculating a difference degree between the first and second input signals, depending on a segmentation method A, B, or C for segmenting a frequency band into sub-bands; a selection unit (104) for selecting one of the segmentation methods; and a difference degree and segmentation information encoding unit (105) for encoding the selected method and the difference degree for each sub-band by the method. A variable frequency segment decoding unit (210) has: a segmentation information decoding unit 202 for decoding the segmentation information to learn the segmentation method; a switching unit (203) for outputting a difference degree code to one of difference degree decoding units corresponding to the segmentation method; and difference degree decoding units (204, 205, and 206), for decoding the difference degree code to the difference degree for each sub-band.

摘要翻译： 提供了一种音频编码装置和音频解码装置，可以灵活地调整码率和声音质量之间的最佳权衡。 可变频率分割编码单元（110）具有：用于计算第一和第二输入信号之间的差值的差分计算单元（101,102和103），这取决于分段方法A，B或C，用于分割 频带变成子带; 选择单元（104），用于选择所述分割方法之一; 以及用于通过该方法对所选择的方法和每个子带的差分度进行编码的差分度和分割信息编码单元（105）。 可变频段解码单元（210）具有：分割信息解码单元202，对分割信息进行解码以学习分割方法; 切换单元，用于将差分度码输出到与分割方法对应的差分度解码单元之一; 和差分度解码单元（204,205和206），用于将差分度码解码为每个子带的差分度。

公开(公告)号：US08428953B2

公开(公告)日：2013-04-23

申请号：US12521916

申请日：2008-05-20

申请人： Kojiro Ono ,  Takeshi Norimatsu ,  Yoshiaki Takagi ,  Takashi Katayama

发明人： Kojiro Ono ,  Takeshi Norimatsu ,  Yoshiaki Takagi ,  Takashi Katayama

IPC分类号： G10L13/06 ,  G10L21/02 ,  G10L21/00 ,  G10L11/00 ,  G10L11/04 ,  G10L11/06

CPC分类号： G10L19/005

摘要： An audio decoding device of the present invention includes: a decoding unit decoding a stream to a spectrum coefficient, and outputting stream information when a frame included in the stream cannot be decoded; an orthogonal transformation unit transforming the spectrum coefficient to a time signal; a correction unit generating a correction time signal based on an output waveform within a reference section that is in a section that overlaps between an error frame section to which the stream information is outputted and an adjacent frame section and that is a section in the middle of the adjacent frame section, when the decoding unit outputs the stream information: and an output unit generating the output waveform by synthesizing the correction time signal and the time signal.

摘要翻译： 本发明的音频解码装置包括：解码单元将流解码为频谱系数，并且当流中包括的帧不能被解码时，输出流信息; 正交变换单元，将频谱系数变换为时间信号; 校正单元，基于在与输出流信息的错误帧部分和相邻帧部分重叠的部分中的基准部分内的输出波形，生成校正时间信号， 相邻帧部分，当解码单元输出流信息时;以及输出单元，通过合成校正时间信号和时间信号来产生输出波形。

公开(公告)号：US20090326934A1

公开(公告)日：2009-12-31

申请号：US12521916

申请日：2008-05-20

申请人： Kojiro Ono ,  Takeshi Norimatsu ,  Yoshiaki Takagi ,  Takashi Katayama

发明人： Kojiro Ono ,  Takeshi Norimatsu ,  Yoshiaki Takagi ,  Takashi Katayama

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

CPC分类号： G10L19/005

摘要： An audio decoding device of the present invention includes: a decoding unit decoding a stream to a spectrum coefficient, and outputting stream information when a frame included in the stream cannot be decoded; an orthogonal transformation unit transforming the spectrum coefficient to a time signal; a correction unit generating a correction time signal based on an output waveform within a reference section that is in a section that overlaps between an error frame section to which the stream information is outputted and an adjacent frame section and that is a section in the middle of the adjacent frame section, when the decoding unit outputs the stream information: and an output unit generating the output waveform by synthesizing the correction time signal and the time signal.

摘要翻译： 本发明的音频解码装置包括：解码单元将流解码为频谱系数，并且当流中包括的帧不能被解码时，输出流信息; 正交变换单元，将频谱系数变换为时间信号; 校正单元，基于在与输出流信息的错误帧部分和相邻帧部分重叠的部分中的基准部分内的输出波形，生成校正时间信号， 相邻帧部分，当解码单元输出流信息时;以及输出单元，通过合成校正时间信号和时间信号来产生输出波形。