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：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：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：US08081764B2

公开(公告)日：2011-12-20

申请号：US11993066

申请日：2006-07-11

申请人： Yosiaki Takagi ,  Kok seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

发明人： Yosiaki Takagi ,  Kok seng Chong ,  Takeshi Norimatsu ,  Shuji Miyasaka ,  Akihisa Kawamura ,  Kojiro Ono

IPC分类号： H04R5/00

CPC分类号： G10L19/008 ,  G10L19/0204

摘要： Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder (102) and an analysis filter bank (110) which generate, from a coded down-mixed signal, the first frequency band signal (x) corresponding to a down-mixed signal (M); a channel expansion unit (130) which converts the first frequency band signal (x) generated by the analysis filter bank (110) into output signals (y) corresponding to respective audio signals of N channels, using BC information; an synthesis filter bank (140) which performs band synthesis for the output signals (y) generate by the channel expansion unit (130) and thereby converts the output signals (y) into the respective audio signals of the N channels on a time axis; and an aliasing noise detection unit (120) which detects occurrence of aliasing noise in the first frequency band signal (x). The channel expansion unit (130) further prevents the aliasing noise from being included in the output signals (y), based on information detected by the aliasing noise detection unit (120).

摘要翻译： 提供一种音频解码器，其可以在抑制混叠噪声的发生的同时减少算术运算量。 音频解码器包括：解码器（102）和分析滤波器组（110），其从编码的下变频信号产生与下混合信号（M）对应的第一频带信号（x）; 信道扩展单元，其使用BC信息将由分析滤波器组（110）生成的第一频带信号（x）转换成对应于N个信道的各个音频信号的输出信号（y）; 合成滤波器组（140），其对由所述信道扩展单元（130）生成的输出信号（y）进行频带合成，从而将输出信号（y）转换成时间轴上的N个信道的各个音频信号; 以及用于检测第一频带信号（x）中的混叠噪声的出现的混叠噪声检测单元（120）。 信道扩展单元（130）还基于混叠噪声检测单元（120）检测到的信息进一步防止混叠噪声包含在输出信号（y）中。

公开(公告)号：US20100235171A1

公开(公告)日：2010-09-16

申请号：US11993066

申请日：2006-07-11

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

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

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0204

摘要： Provided is an audio decoder which can reduce an amount of arithmetic operations while suppressing occurrence of aliasing noise. The audio decoder includes: a decoder (102) and an analysis filter bank (110) which generate, from a coded down-mixed signal, the first frequency band signal (x) corresponding to a down-mixed signal (M); a channel expansion unit (130) which converts the first frequency band signal (x) generated by the analysis filter bank (110) into output signals (y) corresponding to respective audio signals of N channels, using BC information; an synthesis filter bank (140) which performs band synthesis for the output signals (y) generate by the channel expansion unit (130) and thereby converts the output signals (y) into the respective audio signals of the N channels on a time axis; and an aliasing noise detection unit (120) which detects occurrence of aliasing noise in the first frequency band signal (x). The channel expansion unit (130) further prevents the aliasing noise from being included in the output signals (y), based on information detected by the aliasing noise detection unit (120).

摘要翻译： 提供一种音频解码器，其可以在抑制混叠噪声的发生的同时减少算术运算量。 音频解码器包括：解码器（102）和分析滤波器组（110），其从编码的下变频信号产生与下混合信号（M）对应的第一频带信号（x）; 信道扩展单元，其使用BC信息将由分析滤波器组（110）生成的第一频带信号（x）转换成对应于N个信道的各个音频信号的输出信号（y）; 合成滤波器组（140），对由所述信道扩展单元（130）产生的输出信号（y）进行频带合成，从而将输出信号（y）转换成时间轴上的N个信道的各个音频信号; 以及用于检测第一频带信号（x）中的混叠噪声的出现的混叠噪声检测单元（120）。 信道扩展单元（130）还基于混叠噪声检测单元（120）检测到的信息进一步防止混叠噪声包含在输出信号（y）中。

公开(公告)号：US08284961B2

公开(公告)日：2012-10-09

申请号：US11995571

申请日：2006-07-10

申请人： Shuji Miyasaka ,  Yosiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono

发明人： Shuji Miyasaka ,  Yosiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono

IPC分类号： H04B1/00

CPC分类号： H04S3/002 ,  G10L19/008 ,  H04S2420/03

摘要： A signal processing device includes a generation unit that generates a second signal from a first signal that is obtained by down mixing two signals; a mixing coefficient determination unit that determines, based on a value L and a value θ, a mixing degree for mixing the first signal and the second signal; and a mixing unit that mixes the first signal and the second signal based on the mixing degree determined by the mixing coefficient determination unit. The generation unit includes a first filter that generates a low frequency band signal in the second signal, from a low frequency band signal in the first signal; and a second filter that generates a high frequency band signal in the second signal, from a high frequency band signal in the first signal. The first filter is a filter unit which, for a complex-number signal, de-correlates an input signal and adds a reverberation component by using a delay unit and an all pass filter, and the processing unit is a filter unit different from the first filter.

摘要翻译： 信号处理装置包括生成单元，该生成单元从通过混合两个信号获得的第一信号产生第二信号; 混合系数确定单元，其基于值L和值来确定用于混合第一信号和第二信号的混合度; 以及混合单元，其基于由混合系数确定单元确定的混合程度来混合第一信号和第二信号。 该生成单元包括从第一信号中的低频带信号在第二信号中产生低频带信号的第一滤波器; 以及第二滤波器，其从第一信号中的高频带信号在第二信号中产生高频带信号。 第一滤波器是滤波器单元，对于复数信号，使输入信号去相关，并通过使用延迟单元和全通滤波器来添加混响分量，并且处理单元是与第一滤波器不同的滤波器单元 过滤。

公开(公告)号：US20090122182A1

公开(公告)日：2009-05-14

申请号：US11995571

申请日：2006-07-10

申请人： Shuji Miyasaka ,  Yosiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono

发明人： Shuji Miyasaka ,  Yosiaki Takagi ,  Takeshi Norimatsu ,  Akihisa Kawamura ,  Kojiro Ono

IPC分类号： H04N7/12

CPC分类号： H04S3/002 ,  G10L19/008 ,  H04S2420/03

摘要： A signal processing device (1) includes: a generation unit (32) which generates a second signal from a first signal that is obtained by downmixing two signals; a mixing coefficient determination unit (40) which determines, based on a value L and a value θ, a mixing degree for mixing the first signal and the second signal, the value L indicating a level ratio between the two signals, and the value θ indicating a phase difference between the two signals; and a mixing unit (50) which mixes the first signal and the second signal based on the mixing degree determined by the mixing coefficient determination unit (40). The generation unit (32) includes: a first filter (302) which generates a low frequency band signal in the second signal, from a low frequency band signal in the first signal; and a second filter (a processing unit 307) which generates a high frequency band signal in the second signal, from a high frequency band signal in the first signal. The first filter (302) is a filter unit which, for a complex-number signal, decorrelates an input signal and adds a reverberation component by using a delay unit (301) and an all pass filter, and the processing unit (307) is a filter unit different from the first filter (302).

摘要翻译： 信号处理装置（1）包括：生成单元（32），其从通过对两个信号进行下混合获得的第一信号产生第二信号; 混合系数确定单元（40），其基于值L和值θ来确定用于混合第一信号和第二信号的混合度，表示两个信号之间的电平比的值L和值θ 表示两个信号之间的相位差; 以及基于由混合系数确定单元（40）确定的混合程度混合第一信号和第二信号的混合单元（50）。 生成单元（32）包括：从第一信号中的低频带信号生成第二信号中的低频带信号的第一滤波器（302） 以及从第一信号中的高频带信号在第二信号中产生高频带信号的第二滤波器（处理单元307）。 第一滤波器（302）是滤波器单元，对于复数信号，通过使用延迟单元（301）和全通滤波器去除相关输入信号并添加混响分量，并且处理单元（307）是 与第一过滤器（302）不同的过滤器单元。