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：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：US08046217B2

公开(公告)日：2011-10-25

申请号：US11660094

申请日：2005-08-02

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

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

IPC分类号： G10L19/14 ,  G10L19/00 ,  G10L19/02

CPC分类号： G10L19/008 ,  H04S3/00

摘要： An audio decoder which reproduces original signals from a bit stream including (i) a downmix signal of the original signals, and (ii) supplementary information indicating a gain ratio D and phase difference θ between the original signals. The audio decoder includes: a decoding unit extracting the downmix signal; a transformation unit transforming the extracted downmix signal into a frequency domain signal; a phase rotator determination unit determining two phase rotators having, as the phase rotation angles, angles α and β respectively obtained by dividing a contained angle by a diagonal of a parallelogram; a separation unit separating the frequency domain signal into two separation signals respectively indicating angles α and β as phase differences between the signals and the decoded downmix signal; and an inverse transformation unit inversely transforming the respective two separation signals into time domain signals so as to reproduce the two audio signals.

摘要翻译： 一种从比特流再现原始信号的音频解码器，包括（i）原始信号的下混信号，以及（ii）指示增益比D和相位差的补充信息; 之间的原始信号。 音频解码器包括：提取下混合信号的解码单元; 变换单元，将提取的下混合信号变换为频域信号; 相位旋转器确定单元确定具有角度α和＆lt; bgr的相位旋转角度的两个相位旋转器; 分别通过将包含的角度除以平行四边形的对角线而获得; 分离单元，将频域信号分离成分别表示角度α和＆lt; bgr的两个分离信号; 作为信号与解码缩混信号之间的相位差; 以及逆变换单元，将相应的两个分离信号逆变换为时域信号，以再现两个音频信号。

公开(公告)号：US20070255572A1

公开(公告)日：2007-11-01

申请号：US11660094

申请日：2005-08-02

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

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

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  H04S3/00

摘要： An audio decoder which reproduces original signals from a bit stream including a downmix signal of the original signals and supplementary information indicating the gain ratio D and the phase difference θ between the original signals. The audio decoder which reproduces the original signals includes: a decoding unit (100) which extracts the downmix signal from the bitstream; a transformation unit (101) which transforms the extracted downmix signal into a frequency domain signal; a phase rotator determination unit (102) which determines two phase rotators having, as the phase rotation angles, angles α and β respectively obtained by dividing a contained angle by a diagonal of a parallelogram where the length ratio of two adjacent sides equals to the gain ratio D and the contained angle equals to the phase difference θ, a separation unit (103) which separates the frequency domain signal into two separation signals respectively indicating angles α and β as phase differences between the signals and the decoded downmix signal, and an inverse transformation unit (104) which inversely transforms the respective two separation signals into time domain signals so as to reproduce the two audio signals.

摘要翻译： 一种音频解码器，其从包括原始信号的下混信号的比特流中再现原始信号，以及指示增益比D和原始信号之间的相位差θ的补充信息。 再现原始信号的音频解码器包括：解码单元（100），其从比特流中提取降混信号; 变换单元，其将所提取的下混信号变换为频域信号; 相位旋转器确定单元（102），其确定两个相位旋转器，其具有作为相位旋转角度的角度α和β，分别通过将包含的角度除以两个相邻边的长度比等于增益的平行四边形的对角线获得 比率D和包含的角度等于相位差θ，分离单元（103）将频域信号分离成分别表示角度α和β的两个分离信号，作为信号和解码的下混信号之间的相位差，以及反相 变换单元（104），其将相应的两个分离信号逆变换为时域信号，以便再现两个音频信号。

公开(公告)号：US20070271095A1

公开(公告)日：2007-11-22

申请号：US11659949

申请日：2005-08-18

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

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

IPC分类号： G10L19/00 ,  G10L19/02 ,  H03M7/30

CPC分类号： G11B27/022 ,  G10L19/008 ,  G11B20/00007

摘要： An audio encoder, which is capable of encoding multiple-channel signals so that only a downmixed signal is decoded and of further generating specific auxiliary information necessary for dividing the downmixed signal, is provided. An audio encoder (10), which compresses and encodes audio signals of N-channels (N>1), includes a downmixed signal encoding unit (11) which encodes the downmixed signal obtained by downmixing the audio signals, and an auxiliary information generation unit (12a) which generates auxiliary information necessary for decoding the downmixed signal encoded by the downmixed signal encoding unit (11) into N-channel audio signals. The auxiliary information generation unit (12a) includes transformation units (121) and (122) which transform audio signals respectively into frequency domain signals, a detection unit (123) which detects phase difference information and gain ratio information each indicates a degree of difference between frequency domain signals, and a quantization unit (125) which quantizes, for each frequency band, the phase difference information and gain ratio information detected by the detection unit (123) using the quantization precision setting table (124). The quantization precision setting table (124) functions as a division unit which divides a frequency band of a frequency domain signal into plural sub-bands.

摘要翻译： 一种音频编码器，其能够对多声道信号进行编码，使得只下降混合信号被解码，并且进一步产生分割下混合信号所需的特定辅助信息。 对N声道（N> 1）的音频信号进行压缩编码的音频编码器（10）包括下混合信号编码单元（11），其对通过降低音频信号而获得的下混合信号进行编码，以及辅助信息生成单元 （12a），其产生将由下混合信号编码单元（11）编码的下混合信号解码成N声道音频信号所需的辅助信息。 辅助信息生成单元（12a）包括将音频信号分别变换为频域信号的变换单元（121）和（122），检测单元（123），其检测相位差信息，增益比信息各自表示差异度 和量化单元（125），其对于每个频带，使用量化精度设定表（124）对由检测单元（123）检测的相位差信息和增益比信息进行量化。 量化精度设定表（124）作为将频域信号的频带划分为多个子带的分割单位起作用。

公开(公告)号：US07848931B2

公开(公告)日：2010-12-07

申请号：US11659949

申请日：2005-08-18

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

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

IPC分类号： G10L19/00

CPC分类号： G11B27/022 ,  G10L19/008 ,  G11B20/00007

摘要： An audio encoder, which is capable of encoding multiple-channel signals so that only a downmixed signal is decoded and of further generating specific auxiliary information necessary for dividing the downmixed signal, is provided.An audio encoder (10), which compresses and encodes audio signals of N-channels (N>1), includes a downmixed signal encoding unit (11) which encodes the downmixed signal obtained by downmixing the audio signals, and an auxiliary information generation unit (12a) which generates auxiliary information necessary for decoding the downmixed signal encoded by the downmixed signal encoding unit (11) into N-channel audio signals. The auxiliary information generation unit (12a) includes transformation units (121) and (122) which transform audio signals respectively into frequency domain signals, a detection unit (123) which detects phase difference information and gain ratio information each indicates a degree of difference between frequency domain signals, and a quantization unit (125) which quantizes, for each frequency band, the phase difference information and gain ratio information detected by the detection unit (123) using the quantization precision setting table (124). The quantization precision setting table (124) functions as a division unit which divides a frequency band of a frequency domain signal into plural sub-bands.

摘要翻译： 一种音频编码器，其能够对多声道信号进行编码，使得只下降混合信号被解码，并且进一步产生分割下混合信号所需的特定辅助信息。 对N声道（N> 1）的音频信号进行压缩编码的音频编码器（10）包括下混合信号编码单元（11），其对通过降低音频信号而获得的下混合信号进行编码，以及辅助信息生成单元 （12a），其生成将由下混合信号编码单元（11）编码的下混合信号解码为N声道音频信号所需的辅助信息。 辅助信息生成单元（12a）包括将音频信号分别变换为频域信号的变换单元（121）和（122），检测单元（123），检测相位差信息和增益比信息，每个都表示 频域信号，以及量化单元（125），其对于每个频带，使用量化精度设定表（124）对由检测单元（123）检测的相位差信息和增益比信息进行量化。 量化精度设定表（124）作为将频域信号的频带划分为多个子带的分割单位起作用。

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：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。