公开(公告)号：US08972249B2

公开(公告)日：2015-03-03

申请号：US13634658

申请日：2011-03-15

申请人： Shiro Suzuki ,  Yuuki Matsumura ,  Jun Matsumoto ,  Yuuji Maeda ,  Yasuhiro Toguri

发明人： Shiro Suzuki ,  Yuuki Matsumura ,  Jun Matsumoto ,  Yuuji Maeda ,  Yasuhiro Toguri

IPC分类号： G10L19/02 ,  G10L21/038

CPC分类号： G10L21/038 ,  G10L19/0212

摘要： The present invention relates to a decoding apparatus, a decoding method, an encoding apparatus, an encoding method, and programs that can shorten the delay time caused by the band extension at the time of decoding, and restrain increases in resources on the decoding side.A higher frequency component generating unit (73) generates a pseudo higher frequency spectrum by using a lower frequency spectrum (SP-L) and a higher frequency envelope (ENV-H). A phase randomizing unit (74) randomizes the phase of the pseudo higher frequency spectrum, based on a random flag (RND). An inverse MDCT unit (75) denormalizes the lower frequency spectrum (SP-L) by using a lower frequency envelope (ENV-L), and combines the pseudo higher frequency spectrum supplied from the phase randomizing unit (74) with the denormalized lower frequency spectrum (SP-L). The combination result is used as the spectrum of the entire band. The present invention can be applied to a decoding apparatus that performs band extension decoding, for example.

摘要翻译： 解码装置，解码方法，编码装置，编码方法和程序技术领域本发明涉及可以缩短在解码时由频带扩展引起的延迟时间的解码装置，解码方法，编码装置，编码方法和程序，并且抑制解码侧的资源增加。 较高频率分量产生单元（73）通过使用较低频谱（SP-L）和较高频率包络（ENV-H）产生伪较高频谱。 相位随机化单元（74）基于随机标记（RND）使伪较高频谱的相位随机化。 逆MDCT单元（75）通过使用较低频率包络（ENV-L）对较低频谱（SP-L）进行非归一化，并且将从相位随机化单元（74）提供的伪高频频谱与非归一化较低频率 光谱（SP-L）。 组合结果用作整个频带的频谱。 本发明可以应用于例如进行频带扩展解码的解码装置。

公开(公告)号：US20120026861A1

公开(公告)日：2012-02-02

申请号：US13191216

申请日：2011-07-26

申请人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： H04J11/00

CPC分类号： H04L27/2649 ,  H04L27/2639

摘要： A decoding device includes an acquisition unit configured to acquire a first frequency signal including a narrowband signal and a wideband signal, a direct inverse orthogonal transform unit configured to perform a direct matrix operation with respect to the narrowband signal of the first frequency signal so as to perform inverse orthogonal transform, and a high-speed inverse orthogonal transform unit configured to perform inverse orthogonal transform employing a high-speed operation method with respect to the wideband signal of the first frequency signal.

摘要翻译： 解码装置包括：获取单元，被配置为获取包括窄带信号和宽带信号的第一频率信号;直接逆正交变换单元，被配置为对所述第一频率信号的窄带信号执行直接矩阵运算，以便 执行逆正交变换，以及高速逆正交变换单元，被配置为使用相对于第一频率信号的宽带信号的高速运算方法执行逆正交变换。

公开(公告)号：US08976642B2

公开(公告)日：2015-03-10

申请号：US13191216

申请日：2011-07-26

申请人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： H04J11/00 ,  H04L27/26

CPC分类号： H04L27/2649 ,  H04L27/2639

摘要： A decoding device includes an acquisition unit configured to acquire a first frequency signal including a narrowband signal and a wideband signal, a direct inverse orthogonal transform unit configured to perform a direct matrix operation with respect to the narrowband signal of the first frequency signal so as to perform inverse orthogonal transform, and a high-speed inverse orthogonal transform unit configured to perform inverse orthogonal transform employing a high-speed operation method with respect to the wideband signal of the first frequency signal.

摘要翻译： 解码装置包括：获取单元，被配置为获取包括窄带信号和宽带信号的第一频率信号;直接逆正交变换单元，被配置为对所述第一频率信号的窄带信号执行直接矩阵运算，以便 执行逆正交变换，以及高速逆正交变换单元，被配置为使用相对于第一频率信号的宽带信号的高速运算方法执行逆正交变换。

公开(公告)号：US08812927B2

公开(公告)日：2014-08-19

申请号：US13301542

申请日：2011-11-21

申请人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： H03M13/00 ,  H04J11/00 ,  H04L27/00

CPC分类号： G10L19/005 ,  G10L19/0212 ,  G10L25/06 ,  G10L25/90

摘要： A decoding device including a decoding unit which decodes encoded data, an inverse orthogonal transformation unit which performs inverse orthogonal transformation for the encoded data and obtains a time series waveform element in a unit of blocks, a correlation calculation unit which obtains a correlation between a time series waveform element of a block arranged immediately before an error block which is a block in which an error has occurred during decoding by the decoding unit and a time series waveform element of a block arranged a predetermined number of blocks before the block, a cycle calculation unit which obtains a basic cycle of a block unit of the error block based on the correlation obtained by the correlation calculation unit, and a generation unit which generates a substitute signal of the time series waveform element of the error block.

摘要翻译： 一种解码装置，包括对编码数据进行解码的解码单元，对编码数据执行逆正交变换的逆正交变换单元，以块为单位求出时间序列波形要素;相关计算单元， 紧接在作为在解码单元进行解码期间发生错误的块的错误块之前布置的块的串联波形元素以及在块前排列预定数量的块的块的时间序列波形元素，周期计算 单元，其基于由相关计算单元获得的相关性获得误差块的块单位的基本周期;以及生成单元，其生成误差块的时间序列波形元素的替代信号。

公开(公告)号：US20130006647A1

公开(公告)日：2013-01-03

申请号：US13583994

申请日：2011-03-08

申请人： Shiro Suzuki ,  Yuuki Matsumura ,  Yasuhiro Toguri ,  Yuuji Maeda

发明人： Shiro Suzuki ,  Yuuki Matsumura ,  Yasuhiro Toguri ,  Yuuji Maeda

IPC分类号： G10L19/00

CPC分类号： G10L19/035 ,  G10L19/0212

摘要： The present invention relates to an encoding device and an encoding method, a decoding device and a decoding method, and a program that reduce deterioration of sound quality due to encoding of audio signals.An envelope emphasis part (51) emphasizes an envelope (ENV). A noise shaping part (52) divides an emphasized envelope (D) formed by emphasis of the envelope (ENV) by a value larger than 1, and subtracts noise shaping (G) specified by information (NS) from a result of the division. A quantization part (14) sets a result of the subtraction as a quantization bit count (WL), and quantizes a normalized spectrum (S1) formed by normalization of a spectrum (S0) based on the quantization bit count (WL). A multiplexing part (53) multiplexes the information (NS), a quantized spectrum (QS) formed by quantization of the normalized spectrum (S1), and the envelope (ENV). The present invention can be applied to an encoding device encoding audio signals, for example.

摘要翻译： 编码装置和编码方法，解码装置和解码方法技术领域本发明涉及一种减少音频信号编码导致的音质劣化的程序。 信封重点部分（51）强调信封（ENV）。 噪声整形部分（52）将由包络（ENV）的强调形成的强调包络（D）除以大于1的值，并从分割结果中减去由信息（NS）指定的噪声整形（G）。 量化部分（14）将减法的结果设置为量化位计数（WL），并且通过基于量化位计数（WL）对通过频谱归一化形成的归一化频谱（S1）进行量化。 复用部分（53）复用信息（NS），通过归一化频谱（S1）的量化形成的量化频谱（QS）和信封（ENV）。 例如，本发明可以应用于编码音频信号的编码装置。

公开(公告)号：US09672832B2

公开(公告)日：2017-06-06

申请号：US13493850

申请日：2012-06-11

申请人： Yasuhiro Toguri ,  Yuuji Maeda ,  Jun Matsumoto ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yasuhiro Toguri ,  Yuuji Maeda ,  Jun Matsumoto ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： H04R5/00 ,  G10L19/008 ,  H04S1/00 ,  H04B1/00

CPC分类号： G10L19/008 ,  H04S1/007 ,  H04S2400/09

摘要： There is provided an audio encoder comprising a determination part determining, based on frequency spectra of audio signals of a plurality of channels, a mixing ratio as a ratio, relative to a frequency spectrum after mixing for each channel of the plurality of channels, of the frequency spectrum for another channel, a mixing part mixing the frequency spectra of the plurality of channels for each channel based on the mixing ratio determined by the determination part, and an encoding part encoding the frequency spectra of the plurality of channels after mixing by the mixing part.

公开(公告)号：US08626501B2

公开(公告)日：2014-01-07

申请号：US13303443

申请日：2011-11-23

申请人： Yasuhiro Toguri ,  Jun Matsumoto ,  Yuuji Maeda ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yasuhiro Toguri ,  Jun Matsumoto ,  Yuuji Maeda ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： G10L21/00

CPC分类号： G10L19/035

摘要： An encoding apparatus includes a time-frequency transform unit that performs a time-frequency transform on an audio signal, a normalization unit that normalizes a frequency spectral coefficient obtained by the time-frequency transform in order to generate encoded data of the audio signal, a level calculation unit that calculates a level of the audio signal, a scale factor changing unit that changes a concealment scale factor included in encoded concealment data obtained by performing, on the basis of the level of the audio signal, a time-frequency transform and normalization on a minute noise signal, the concealment scale factor being a scale factor relating to a coefficient used for the normalization, and an output unit that outputs the encoded data of the audio signal generated by the normalization unit or outputs, as encoded data of the audio signal, the encoded concealment data whose concealment scale factor has been changed.

摘要翻译： 编码装置包括对音频信号执行时间 - 频率变换的时间 - 频率变换单元，对通过时间 - 频率变换得到的频谱系数进行归一化的归一化单元，生成音频信号的编码数据， 电平计算单元，其计算音频信号的电平;比例因子改变单元，其改变通过基于音频信号的电平执行时间 - 频率变换和归一化而获得的编码隐藏数据中包括的隐藏比例因子 在微小噪声信号上，隐藏比例因子是与用于归一化的系数相关的比例因子，以及输出单元，其输出由归一化单元或输出产生的音频信号的编码数据作为音频的编码数据 信号，其隐藏比例因子已经改变的编码隐藏数据。

公开(公告)号：US20130003980A1

公开(公告)日：2013-01-03

申请号：US13493850

申请日：2012-06-11

申请人： Yasuhiro Toguri ,  Yuuji Maeda ,  Jun Matsumoto ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yasuhiro Toguri ,  Yuuji Maeda ,  Jun Matsumoto ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： H04R5/00

CPC分类号： G10L19/008 ,  H04S1/007 ,  H04S2400/09

摘要： There is provided an audio encoder comprising a determination part determining, based on frequency spectra of audio signals of a plurality of channels, a mixing ratio as a ratio, relative to a frequency spectrum after mixing for each channel of the plurality of channels, of the frequency spectrum for another channel, a mixing part mixing the frequency spectra of the plurality of channels for each channel based on the mixing ratio determined by the determination part, and an encoding part encoding the frequency spectra of the plurality of channels after mixing by the mixing part.

摘要翻译： 提供了一种音频编码器，其包括确定部件，其基于多个通道的音频信号的频谱，确定混合比率作为相对于多个通道中的每个通道混合后的频谱的比率 用于另一通道的频谱，混合部分基于由确定部分确定的混合比混合用于每个通道的多个通道的频谱;以及编码部分，其通过混合混合之后编码多个通道的频谱 部分。

公开(公告)号：US08606567B2

公开(公告)日：2013-12-10

申请号：US12832476

申请日：2010-07-08

申请人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

发明人： Yuuji Maeda ,  Jun Matsumoto ,  Yasuhiro Toguri ,  Shiro Suzuki ,  Yuuki Matsumura

IPC分类号： G10L19/02 ,  G10L11/00

CPC分类号： G10L19/0208 ,  G10L19/06 ,  G10L19/18

摘要： Provided is a signal encoding apparatus including: an encoding unit which encodes a quantization value of a frequency spectrum in an input signal through a plurality of encoding algorithms; an amplitude change amount calculation unit which calculates, for each of a plurality of subbands of the frequency spectrum, an amplitude change amount with respect to the frequency spectrum based on a spectrum envelope of the frequency spectrum; and an encoding selection unit which selects, for each subband, the encoding algorithm according to a degree of deflection of an occurrence probability distribution of the quantization value in the amplitude change amount among the plurality of the encoding algorithms.

摘要翻译： 提供一种信号编码装置，包括：编码单元，其通过多个编码算法对输入信号中的频谱的量化值进行编码; 幅度变化量计算单元，对于所述频谱的多个子带中的每一个，基于所述频谱的频谱包络，计算相对于所述频谱的振幅变化量; 以及编码选择单元，对于每个子带，根据多个编码算法中的幅度变化量中的量化值的发生概率分布的偏差程度，选择编码算法。

公开(公告)号：US20130013325A1

公开(公告)日：2013-01-10

申请号：US13634658

申请日：2011-03-15

申请人： Shiro Suzuki ,  Yuuki Matsumura ,  Jun Matsumoto ,  Yuuji Maeda ,  Yasuhiro Toguri

发明人： Shiro Suzuki ,  Yuuki Matsumura ,  Jun Matsumoto ,  Yuuji Maeda ,  Yasuhiro Toguri

IPC分类号： G10L19/00

CPC分类号： G10L21/038 ,  G10L19/0212

摘要： The present invention relates to a decoding apparatus, a decoding method, an encoding apparatus, an encoding method, and programs that can shorten the delay time caused by the band extension at the time of decoding, and restrain increases in resources on the decoding side.A higher frequency component generating unit (73) generates a pseudo higher frequency spectrum by using a lower frequency spectrum (SP-L) and a higher frequency envelope (ENV-H). A phase randomizing unit (74) randomizes the phase of the pseudo higher frequency spectrum, based on a random flag (RND). An inverse MDCT unit (75) denormalizes the lower frequency spectrum (SP-L) by using a lower frequency envelope (ENV-L), and combines the pseudo higher frequency spectrum supplied from the phase randomizing unit (74) with the denormalized lower frequency spectrum (SP-L). The combination result is used as the spectrum of the entire band. The present invention can be applied to a decoding apparatus that performs band extension decoding, for example.

摘要翻译： 解码装置，解码方法，编码装置，编码方法和程序技术领域本发明涉及可以缩短在解码时由频带扩展引起的延迟时间的解码装置，解码方法，编码装置，编码方法和程序，并且抑制解码侧的资源增加。 较高频率分量产生单元（73）通过使用较低频谱（SP-L）和较高频率包络（ENV-H）产生伪较高频谱。 相位随机化单元（74）基于随机标记（RND）使伪较高频谱的相位随机化。 逆MDCT单元（75）通过使用较低频率包络（ENV-L）对较低频谱（SP-L）进行非归一化，并且将从相位随机化单元（74）提供的伪高频频谱与非归一化较低频率 光谱（SP-L）。 组合结果用作整个频带的频谱。 本发明可以应用于例如进行频带扩展解码的解码装置。