公开(公告)号：US07058571B2

公开(公告)日：2006-06-06

申请号：US10491894

申请日：2003-07-30

申请人： Mineo Tsushima ,  Naoya Tanaka ,  Takeshi Norimatsu ,  Kok Seng Chong ,  Kim Hann Kuah ,  Sua Hong Neo ,  Toshiyuki Nomura ,  Osamu Shimada ,  Yuichiro Takamizawa ,  Masahiro Serizawa

发明人： Mineo Tsushima ,  Naoya Tanaka ,  Takeshi Norimatsu ,  Kok Seng Chong ,  Kim Hann Kuah ,  Sua Hong Neo ,  Toshiyuki Nomura ,  Osamu Shimada ,  Yuichiro Takamizawa ,  Masahiro Serizawa

IPC分类号： G10L21/02

CPC分类号： G10L21/038 ,  G10L19/02

摘要： A wideband, high quality audio signal is decoded with few calculations at a low bitrate. Unwanted spectrum components accompanying sinusoidal signal injection by a synthesis subband filter built with real-value operations are suppressed by inserting a suppression signal to subbands adjacent to the subband to which the sine wave is injected. This makes it possible to inject a desired sinusoid with few calculations.

摘要翻译： 宽带，高质量的音频信号以低比特率进行少量计算解码。 通过用实数值操作构建的合成子带滤波器伴随正弦信号注入的不需要的频谱分量通过将抑制信号插入到与正弦波被注入的子带相邻的子带来被抑制。 这样可以很少的计算注入所需的正弦波。

公开(公告)号：US20050149339A1

公开(公告)日：2005-07-07

申请号：US10496798

申请日：2003-09-11

申请人： Naoya Tanaka ,  Osamu Shimada ,  Mineo Tsushima ,  Takeshi Norimatsu ,  Kok Seng Chong ,  Kim Hann Kuah ,  Sua Hong Neo ,  Toshiyuki Nomura ,  Yuichiro Takamizawa ,  Masahiro Serizawa

发明人： Naoya Tanaka ,  Osamu Shimada ,  Mineo Tsushima ,  Takeshi Norimatsu ,  Kok Seng Chong ,  Kim Hann Kuah ,  Sua Hong Neo ,  Toshiyuki Nomura ,  Yuichiro Takamizawa ,  Masahiro Serizawa

IPC分类号： G10L19/08 ,  G10L21/02 ,  H03M7/30 ,  G10L19/00

CPC分类号： G10L21/038 ,  G10L19/0204

摘要： An audio decoding apparatus decodes high frequency component signals using a band expander that generates multiple high frequency subband signals from low frequency subband signals divided into multiple subbands and transmitted high frequency encoded information. The apparatus is provided with an aliasing detector and an aliasing remover. The aliasing detector detects the degree of occurrence of aliasing components in the multiple high frequency subband signals generated by the band expander. The aliasing remover suppresses aliasing components in the high frequency subband signals by adjusting the gain used to generate the high frequency subband signals. Thus occurrence of aliasing can be suppressed and the resulting degradation in sound quality can be reduced, even when real-valued subband signals are used in order to reduce the number of operations.

摘要翻译： 音频解码装置利用频带扩展器对高频分量信号进行解码，频带扩展器从分割成多个子带的低频子带信号和发送的高频编码信息生成多个高频子带信号。 该装置设置有混叠检测器和混叠去除器。 混叠检测器检测由频带扩展器产生的多个高频子带信号中的混叠分量的出现程度。 混叠去除器通过调整用于产生高频子带信号的增益来抑制高频子带信号中的混叠分量。 因此，即使使用实值子带信号以减少操作次数，也可以抑制混叠的发生，并且可以降低所产生的声音质量下降。

公开(公告)号：US20060245489A1

公开(公告)日：2006-11-02

申请号：US10557149

申请日：2004-06-07

申请人： Mineo Tsushima

发明人： Mineo Tsushima

IPC分类号： H04B1/66

CPC分类号： H04N19/126 ,  H03M7/40 ,  H04N19/187 ,  H04N19/94

摘要： A coding apparatus (500) includes: a fourth layer codebook that shows N number of (N is a natural number) codes indicating uniquely respective N integers that increment one by one; and first to third layer codebooks that show M number of (M is a natural number that satisfies M

摘要翻译： 一种编码装置（500）包括：第四层码本，其显示N个（N是自然数），唯一地指示各个逐个递增的N个整数; 以及第一到第三层码本，其显示M个数（M是满足M

公开(公告)号：US20100042415A1

公开(公告)日：2010-02-18

申请号：US12438915

申请日：2007-12-05

申请人： Mineo Tsushima ,  Akihisa Kawamura

发明人： Mineo Tsushima ,  Akihisa Kawamura

IPC分类号： G10L21/00

CPC分类号： G10L19/022

摘要： It possible not only to reduce a delay, but also to enhance the coding efficiency and reduce audio artifact upon coding.An audio signal coding method for coding an audio signal to be coded, the method comprising: judging for each of frames whether or not coding should be performed on each of two or more subframes into which the frame is divided, based on an audio signal contained in the frame into which the audio signal to be coded is divided for every set of samples; and when judged that the coding should be performed on each of the subframes, performing, for each subframe, subframe processing of (i) determining a value representing a characteristic of an audio signal of the subframe, and (ii) coding the audio signal using the determined value, wherein in the performing of the subframe processing, whether or not all the values determined for the subframes are the same is judged, and when all the values are the same, the audio signal is coded as exceptional processing, using a characteristic different from characteristics of audio signals indicated by the values.

摘要翻译： 可能不仅可以减少延迟，还可以提高编码效率，减少编码时的音频伪影。 一种用于对要编码的音频信号进行编码的音频信号编码方法，所述方法包括：基于所包含的音频信号，判断每个帧是否应对被划分的帧的两个或更多个子帧中的每一个执行编码 在每个样本集合中划分要编码的音频信号的帧; 并且当判断为每个子帧执行编码时，对于每个子帧执行子帧处理（i）确定表示子帧的音频信号的特性的值，以及（ii）使用 确定的值，其中在执行子帧处理中，判定对于子帧确定的全部值是否相同，并且当所有值相同时，将音频信号编码为异常处理，使用特性 与由值指示的音频信号的特性不同。

公开(公告)号：US07657429B2

公开(公告)日：2010-02-02

申请号：US10557149

申请日：2004-06-07

申请人： Mineo Tsushima

发明人： Mineo Tsushima

IPC分类号： G10L19/14 ,  H03M7/42

CPC分类号： H04N19/126 ,  H03M7/40 ,  H04N19/187 ,  H04N19/94

摘要： A coding apparatus includes a fourth layer codebook that shows N number of codes indicating uniquely respective N integers that increment one by one; and first to third layer codebooks that show M number of codes indicating uniquely respective M integers that are a subset of the N integers, and codes a digital signal using any one of the first to fourth layer codebooks. The coding apparatus does not need to do rescaling even when switching one of the first to fourth layer codebooks into another of them.

摘要翻译： 编码装置包括：第四层码本，其显示N个代码，其唯一地指示逐个递增的各自的N个整数; 以及第一至第三层码本，其显示M个代表唯一地指示作为N个整数的子集的各个M个整数的代码，并且使用第一至第四层码本中的任一个对数字信号进行编码。 即使将第一至第四层码本中的一个转换成另一个码本，编码装置也不需要重新缩放。

公开(公告)号：US20070244706A1

公开(公告)日：2007-10-18

申请号：US11579740

申请日：2005-05-17

申请人： Mineo Tsushima

发明人： Mineo Tsushima

IPC分类号： G10L19/00

CPC分类号： H04S1/007 ,  G10L19/008

摘要： A portable player (710) or a multi-channel home player (730) includes: a mixed signal decoding unit (711) that extracts, from a first inputted coded stream, a second coded stream representing a downmix signal into which multi-channel audio signals are mixed and supplementary information for reverting the downmix signal back to the multi-channel audio signals before being downmixed, and that decodes the second coded stream representing the downmix signal; a signal separation processing unit (731) that separates the downmix signal obtained by decoding based on the extracted supplementary information and that generates audio signals which are acoustically approximate to the multi-channel audio signals before being downmixed; and headphones or speakers (720) that reproduce the decoded downmix signal or speakers (740) that reproduce the multi-channel audio signals separated from the downmix singal.

摘要翻译： 便携式播放器（710）或多声道家庭播放器（730）包括：混合信号解码单元（711），其从第一输入编码流提取表示下混合信号的第二编码流，多声道音频 信号被混合，并且用于在下混合之前将下混合信号返回到多声道音频信号的补充信息，并且对表示下混合信号的第二编码流进行解码; 信号分离处理单元，其分离通过解码获得的下混合信号，所述下混合信号基于所提取的补充信息，并且在被混合之前产生声学上接近于多声道音频信号的音频信号; 以及再现解码缩混信号的耳机或扬声器（720）或再现与下混合单音分离的多声道音频信号的扬声器（740）。

公开(公告)号：US07756713B2

公开(公告)日：2010-07-13

申请号：US11629135

申请日：2005-06-28

申请人： Kok Seng Chong ,  Naoya Tanaka ,  Sua Hong Neo ,  Mineo Tsushima

发明人： Kok Seng Chong ,  Naoya Tanaka ,  Sua Hong Neo ,  Mineo Tsushima

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/24

摘要： In the conventional art inventions for coding multi-channel audio signals, three of the major processes involved are: generation of a reverberation signal using an all-pass filter; segmentation of a signal in the time and frequency domains for the purpose of level adjustment; and mixing of a coded binaural signal with an original signal coded up to a fixed crossover frequency. These processes pose the problems mentioned in the present invention. The present invention proposes the following three embodiments: to control the extent of reverberations by dynamically adjusting all-pass filter coefficients with the inter-channel coherence cues; to segment a signal in the time domain finely in the lower frequency region and coarsely in the higher frequency region; and to control a crossover frequency used for mixing based on a bit rate, and if the original signal is coarsely quantized, to mix a downmix signal with an original signal in proportions determined by an inter-channel coherence cue.

摘要翻译： 在用于编码多声道音频信号的传统技术发明中，涉及的三个主要过程是：使用全通滤波器产生混响信号; 用于时间和频域的信号分段，以进行电平调整; 并将编码的双耳信号与编码为固定的交越频率的原始信号进行混合。 这些处理构成了本发明中提到的问题。 本发明提出以下三个实施例：通过使用信道间相干线索动态调整全通滤波器系数来控制混响的程度; 以在较低频率区域精细地分割时域中的信号，在较高频率区域中粗略地分割信号; 并且基于比特率来控制用于混合的交叉频率，并且如果原始信号被粗量化，则以通过信道内相干提示确定的比例将下混合信号与原始信号混合。

公开(公告)号：US09239374B2

公开(公告)日：2016-01-19

申请号：US13520349

申请日：2011-11-09

申请人： Mineo Tsushima ,  Yasuhito Watanabe ,  Takeo Kanamori

发明人： Mineo Tsushima ,  Yasuhito Watanabe ,  Takeo Kanamori

IPC分类号： G01S7/52 ,  A61B8/00 ,  G01S15/89 ,  G10K11/34

CPC分类号： G01S7/52047 ,  A61B8/4483 ,  G01S7/52077 ,  G01S7/52095 ,  G01S15/8915 ,  G01S15/8927 ,  G10K11/341

摘要： A beamforming method according to the present invention is a method of processing echo signals of a target region which are obtained from a probe including a plurality of receiving elements arrayed on a predetermined line. The beamforming method includes the following steps (S1 to S3). At S1, seed beams are formed from echo signals received by at least two receiving elements from among the plurality of receiving elements. At S2, a main beam and sub beams are formed by synthesizing at least one of the seed beams. At S3, a narrow beam for the target region is formed by multiplying the sub beams by respective predetermined coefficients and subtracting the multiplied sub beams from the main beam. Here, an signal intensity for the target region regarding the main beam is higher than a signal intensity for the target region regarding each of the sub beams.

摘要翻译： 根据本发明的波束成形方法是一种处理从包括排列在预定线上的多个接收元件的探头获得的目标区域的回波信号的方法。 波束形成方法包括以下步骤（S1至S3）。 在S1，种子束由从多个接收元件中的至少两个接收元件接收的回波信号形成。 在S2，通过合成种子束中的至少一个来形成主光束和子光束。 在S3中，通过将子光束相乘预定系数并从主光束中减去相乘的子光束来形成目标区域的窄光束。 这里，关于主光束的目标区域的信号强度高于关于每个子光束的目标区域的信号强度。

公开(公告)号：US20120281502A1

公开(公告)日：2012-11-08

申请号：US13520349

申请日：2011-11-09

申请人： Mineo Tsushima ,  Yasuhito Watanabe ,  Takeo Kanamori

发明人： Mineo Tsushima ,  Yasuhito Watanabe ,  Takeo Kanamori

IPC分类号： G01S15/89 ,  H04B1/02

CPC分类号： G01S7/52047 ,  A61B8/4483 ,  G01S7/52077 ,  G01S7/52095 ,  G01S15/8915 ,  G01S15/8927 ,  G10K11/341

摘要： A beamforming method according to the present invention is a method of processing echo signals of a target region which are obtained from a probe including a plurality of receiving elements arrayed on a predetermined line. The beamforming method includes the following steps (S1 to S3). At S1, seed beams are formed from echo signals received by at least two receiving elements from among the plurality of receiving elements. At S2, a main beam and sub beams are formed by synthesizing at least one of the seed beams. At S3, a narrow beam for the target region is formed by multiplying the sub beams by respective predetermined coefficients and subtracting the multiplied sub beams from the main beam. Here, an signal intensity for the target region regarding the main beam is higher than a signal intensity for the target region regarding each of the sub beams

摘要翻译： 根据本发明的波束成形方法是一种处理从包括排列在预定线上的多个接收元件的探头获得的目标区域的回波信号的方法。 波束形成方法包括以下步骤（S1至S3）。 在S1，种子束由从多个接收元件中的至少两个接收元件接收的回波信号形成。 在S2，通过合成种子束中的至少一个来形成主光束和子光束。 在S3中，通过将子光束相乘预定系数并从主光束中减去相乘的子光束来形成目标区域的窄光束。 这里，关于主光束的目标区域的信号强度高于关于每个子光束的目标区域的信号强度

公开(公告)号：US08160890B2

公开(公告)日：2012-04-17

申请号：US12438915

申请日：2007-12-05

申请人： Mineo Tsushima ,  Akihisa Kawamura

发明人： Mineo Tsushima ,  Akihisa Kawamura

IPC分类号： G10L19/00 ,  G10L19/14

CPC分类号： G10L19/022

摘要： It possible not only to reduce a delay, but also to enhance the coding efficiency and reduce audio artifact upon coding.An audio signal coding method for coding an audio signal to be coded, the method comprising: judging for each of frames whether or not coding should be performed on each of two or more subframes into which the frame is divided, based on an audio signal contained in the frame into which the audio signal to be coded is divided for every set of samples; and when judged that the coding should be performed on each of the subframes, performing, for each subframe, subframe processing of (i) determining a value representing a characteristic of an audio signal of the subframe, and (ii) coding the audio signal using the determined value, wherein in the performing of the subframe processing, whether or not all the values determined for the subframes are the same is judged, and when all the values are the same, the audio signal is coded as exceptional processing, using a characteristic different from characteristics of audio signals indicated by the values.

摘要翻译： 可能不仅可以减少延迟，还可以提高编码效率，减少编码时的音频伪影。 一种用于对要编码的音频信号进行编码的音频信号编码方法，所述方法包括：基于所包含的音频信号，判断每个帧是否应对被划分的帧的两个或更多个子帧中的每一个执行编码 在每个样本集合中划分要编码的音频信号的帧; 并且当判断为每个子帧执行编码时，对于每个子帧执行子帧处理（i）确定表示子帧的音频信号的特性的值，以及（ii）使用 确定的值，其中在执行子帧处理中，判定对于子帧确定的全部值是否相同，并且当所有值相同时，将音频信号编码为异常处理，使用特性 与由值指示的音频信号的特性不同。