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1. 发明授权

US07613306B2 Audio encoder and audio decoder 有权
标题翻译：音频编码器和音频解码器
公开(公告)号：US07613306B2
公开(公告)日：2009-11-03
申请号：US10586905
申请日：2005-02-09
申请人： Shuji Miyasaka , Yoshiaki Takagi , Kazutaka Abe
发明人： Shuji Miyasaka , Yoshiaki Takagi , Kazutaka Abe
IPC分类号： H04R5/00
CPC分类号： G10L19/008
摘要： An audio encoder, generating a stereo signal based on a multi-channel signal, includes a downmix unit for downmixing a multi-channel signal exceeding two channels to a two-channel stereo signal, a first coding unit for generating a first coded signal by coding the downmixed stereo signal, a second coding unit for generating a second coded signal by coding information to restore the downmixed stereo signal to a multi-channel signal, a code size calculating unit for calculating a code size of the second coded signal, and a first multiplexing unit for multiplexing the calculated code size in either the first coded signal or the second coded signal. Accordingly a decoder is able to easily extract a coded signal of the multi-channel signal based on the code size, and the decoder reproducing only the downmixed signal can be configured inexpensively.
摘要翻译：一种音频编码器，其基于多声道信号产生立体声信号，包括用于将超过两声道的多声道信号混合到双声道立体声信号的下混单元，用于通过编码产生第一编码信号的第一编码单元下混合立体声信号，第二编码单元，用于通过对信息进行编码以将下混合立体声信号恢复为多声道信号来产生第二编码信号;码量计算单元，用于计算第二编码信号的码量，复用单元，用于在第一编码信号或第二编码信号中复用所计算的码量。因此，解码器能够基于代码尺寸容易地提取多信道信号的编码信号，并且可以廉价地配置仅再现缩混信号的解码器。

2. 发明申请

US20070162278A1 Audio encoder and audio decoder 有权
标题翻译：音频编码器和音频解码器
公开(公告)号：US20070162278A1
公开(公告)日：2007-07-12
申请号：US10586905
申请日：2005-02-09
申请人： Shuji Miyasaka , Yoshiaki Takagi , Kazutaka Abe
发明人： Shuji Miyasaka , Yoshiaki Takagi , Kazutaka Abe
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： An audio encoder, generating a stereo signal based on a multi-channel signal, includes a downmix unit (100) for downmixing a multi-channel signal exceeding two channels to a two-channel stereo signal, a first coding unit (101) for generating a first coded signal by coding the downmixed stereo signal, a second coding unit (102) for generating a second coded signal by coding information to restore the downmixed stereo signal to a multi-channel signal, a code size calculating unit (103) for calculating a code size of the second coded signal, and a first multiplexing unit (104) for multiplexing the calculated code size in either the first coded signal or the second coded signal. Accordingly a decoder is able to easily extract a coded signal of the multi-channel signal based on the code size, and the decoder reproducing only the downmixed signal can be configured inexpensively.
摘要翻译：一种基于多声道信号生成立体声信号的音频编码器，包括用于将超过两声道的多声道信号混合到双声道立体声信号的下混单元（100），用于产生通过编码下混合立体声信号的第一编码信号，用于通过编码信息生成第二编码信号以将下混合立体声信号恢复为多声道信号的第二编码单元（102），用于计算第二编码信号的代码大小，以及用于在第一编码信号或第二编码信号中复用所计算的代码大小的第一复用单元（104）。因此，解码器能够基于代码尺寸容易地提取多信道信号的编码信号，并且可以廉价地配置仅再现缩混信号的解码器。

3. 发明授权

US08073703B2 Acoustic signal processing apparatus and acoustic signal processing method 有权
标题翻译：声信号处理装置和声信号处理方法
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。

4. 发明申请

US20070271095A1 Audio Encoder 有权
标题翻译：音频编码器
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。

5. 发明授权

US08184817B2 Multi-channel acoustic signal processing device 有权
标题翻译：多通道声信号处理装置
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。

6. 发明授权

US07860721B2 Audio encoding device, decoding device, and method capable of flexibly adjusting the optimal trade-off between a code rate and sound quality 有权
标题翻译：音频编码装置，解码装置和方法，其能够灵活地调整码率和声音质量之间的最佳权衡
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。

7. 发明申请

US20090262949A1 MULTI-CHANNEL ACOUSTIC SIGNAL PROCESSING DEVICE 有权
标题翻译：多通道声信号处理装置
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。

8. 发明申请

US20090240503A1 ACOUSTIC SIGNAL PROCESSING APPARATUS AND ACOUSTIC SIGNAL PROCESSING METHOD 有权
标题翻译：声音信号处理装置和声音信号处理方法
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。

9. 发明授权

US08019614B2 Energy shaping apparatus and energy shaping method 有权
标题翻译：能量整形设备和能量整形方法
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。

10. 发明授权

US07848931B2 Audio encoder 有权
标题翻译：音频编码器
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。

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