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1. 发明授权

US09093080B2 Bandwidth extension method, bandwidth extension apparatus, program, integrated circuit, and audio decoding apparatus 有权
标题翻译：带宽扩展方法，带宽扩展装置，程序，集成电路和音频解码装置
公开(公告)号：US09093080B2
公开(公告)日：2015-07-28
申请号：US13389276
申请日：2011-06-06
申请人： Tomokazu Ishikawa , Takeshi Norimatsu , Huan Zhou , Kok Seng Chong , Haishan Zhong
发明人： Tomokazu Ishikawa , Takeshi Norimatsu , Huan Zhou , Kok Seng Chong , Haishan Zhong
IPC分类号： G10L19/00 , G10L21/038 , G10L21/04
CPC分类号： G10L19/02 , G10L21/038 , G10L21/04
摘要： To provide a bandwidth extension method which allows reduction of computation amount in bandwidth extension and suppression of deterioration of quality in the bandwidth to be extended. In the bandwidth extension method: a low frequency bandwidth signal is transformed into a QMF domain to generate a first low frequency QMF spectrum; pitch-shifted signals are generated by applying different shifting factors on the low frequency bandwidth signal; a high frequency QMF spectrum is generated by time-stretching the pitch-shifted signals in the QMF domain; the high frequency QMF spectrum is modified; and the modified high frequency QMF spectrum is combined with the first low frequency QMF spectrum.
摘要翻译：提供一种允许减少带宽扩展中的计算量并抑制要扩展的带宽中的质量劣化的带宽扩展方法。在带宽扩展方法中：将低频带宽信号变换成QMF域以产生第一低频QMF频谱; 通过在低频带宽信号上应用不同的移位因子来生成音调移位信号; 通过对QMF域中的音调移位信号进行时间扩展来产生高频QMF频谱; 改变高频QMF频谱; 并且修改的高频QMF频谱与第一低频QMF频谱组合。

2. 发明申请

US20120136670A1 BANDWIDTH EXTENSION METHOD, BANDWIDTH EXTENSION APPARATUS, PROGRAM, INTEGRATED CIRCUIT, AND AUDIO DECODING APPARATUS 有权
标题翻译：带宽扩展方法，带宽扩展设备，程序，集成电路和音频解码设备
公开(公告)号：US20120136670A1
公开(公告)日：2012-05-31
申请号：US13389276
申请日：2011-06-06
申请人： Tomokazu Ishikawa , Takeshi Norimatsu , Huan Zhou , Kok Seng Chong , Haishan Zhong
发明人： Tomokazu Ishikawa , Takeshi Norimatsu , Huan Zhou , Kok Seng Chong , Haishan Zhong
IPC分类号： G10L19/00
CPC分类号： G10L19/02 , G10L21/038 , G10L21/04
摘要： To provide a bandwidth extension method which allows reduction of computation amount in bandwidth extension and suppression of deterioration of quality in the bandwidth to be extended. In the bandwidth extension method: a low frequency bandwidth signal is transformed into a QMF domain to generate a first low frequency QMF spectrum; pitch-shifted signals are generated by applying different shifting factors on the low frequency bandwidth signal; a high frequency QMF spectrum is generated by time-stretching the pitch-shifted signals in the QMF domain; the high frequency QMF spectrum is modified; and the modified high frequency QMF spectrum is combined with the first low frequency QMF spectrum.
摘要翻译：提供一种允许减少带宽扩展中的计算量并抑制要扩展的带宽中的质量劣化的带宽扩展方法。在带宽扩展方法中：将低频带宽信号变换成QMF域以产生第一低频QMF频谱; 通过在低频带宽信号上应用不同的移位因子来生成音调移位信号; 通过对QMF域中的音调移位信号进行时间扩展来产生高频QMF频谱; 改变高频QMF频谱; 并且修改的高频QMF频谱与第一低频QMF频谱组合。

3. 发明申请

US20120022676A1 AUDIO SIGNAL PROCESSING APPARATUS, AUDIO CODING APPARATUS, AND AUDIO DECODING APPARATUS 有权
标题翻译：音频信号处理装置，音频编码装置和音频解码装置
公开(公告)号：US20120022676A1
公开(公告)日：2012-01-26
申请号：US13256055
申请日：2010-10-19
申请人： Tomokazu Ishikawa , Takeshi Norimatsu , Kok Seng Chong , Huan Zhou , Haishan Zhong
发明人： Tomokazu Ishikawa , Takeshi Norimatsu , Kok Seng Chong , Huan Zhou , Haishan Zhong
IPC分类号： G06F17/00
CPC分类号： G10L21/04 , G10L21/0388
摘要： To provide an audio signal processing apparatus which can perform, with low operation amount, audio signal processing that is either time stretch and/or compression processing or frequency modulation processing. The audio signal processing apparatus is intended to transform an input audio signal sequence using a predetermined adjustment factor. The audio signal processing apparatus includes a filter bank (2601) which transforms the input audio signal sequence into Quadrature Mirror Filter (QMF) coefficients using a filter for Quadrature Mirror Filter analysis (a QMF analysis filter) and an adjusting unit (2602) which adjusts the QMF coefficients based on a predetermined adjustment factor.
摘要翻译：提供一种音频信号处理装置，其可以以低操作量执行时间延伸和/或压缩处理或频率调制处理的音频信号处理。音频信号处理装置旨在使用预定的调节因子来变换输入音频信号序列。音频信号处理装置包括滤波器组（2601），其使用用于正交镜滤波器分析的滤波器（QMF分析滤波器）和调整单元（2602）将输入音频信号序列变换为正交镜像滤波器（QMF）系数，调整单元（2602）基于预定调整因子的QMF系数。

4. 发明授权

US08081764B2 Audio decoder 有权
标题翻译：音频解码器
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。

5. 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。

6. 发明申请

US20100063828A1 STREAM SYNTHESIZING DEVICE, DECODING UNIT AND METHOD 有权
标题翻译：流合成装置，解码单元和方法
公开(公告)号：US20100063828A1
公开(公告)日：2010-03-11
申请号：US12519248
申请日：2008-10-16
申请人： Tomokazu Ishikawa , Takeshi Norimatsu , Takashi Katayama
发明人： Tomokazu Ishikawa , Takeshi Norimatsu , Takashi Katayama
IPC分类号： G10L19/00
CPC分类号： H04M3/568 , G10L19/008 , G10L25/12 , H04L65/607
摘要： To provide an enhanced true-to-life atmosphere enjoyed in multipoint connecting, and reduce a calculation load at a multipoint connection unit, as well.A stream synthesizing device includes an input unit which inputs at least two coded signals each including a first downmix acoustic signal and an extended signal, each of first downmix acoustic signals being obtained by coding an acoustic signal into which at least two sound signals are downmixed, and the extended signal being for obtaining the at least two sound signals out of the first downmix acoustic signal; a coded signal generating unit which generates: a second downmix acoustic signal and an extended signal based on each of coded signals inputted by the input unit, the second downmix acoustic signal being for obtaining each of the first downmix acoustic signals, and the generated extended signal being for obtaining each of the first downmix acoustic signals out of the second downmix acoustic signal; and generate a coded signal including the generated second downmix acoustic signal, the generated extended signal, and each of extended signals included in the corresponding inputted coded signal; and an output unit which outputs the generated coded signal.
摘要翻译：为了提供在多点连接中享受的增强的真实生活氛围，并减少多点连接单元的计算负荷。流合成装置包括：输入单元，其输入至少两个编码信号，每个编码信号包括第一下混音声信号和扩展信号，每个第一下混音声信号是通过对至少两个声音信号进行混合的声信号进行编码而获得的，并且所述扩展信号用于从所述第一下混声音信号中获得所述至少两个声音信号; 编码信号生成单元，其基于由所述输入单元输入的每个编码信号生成第二下混声音信号和扩展信号，所述第二下混声音信号用于获得所述第一下混声音信号中的每一个，并且所生成的扩展信号用于从所述第二下混声音信号中获得所述第一下混声音信号中的每一个; 并生成包括所生成的第二下混声音信号，所生成的扩展信号和包括在相应的输入编码信号中的每个扩展信号的编码信号; 以及输出单元，其输出所生成的编码信号。

7. 发明授权

US07668711B2 Coding equipment 有权
标题翻译：编码设备
公开(公告)号：US07668711B2
公开(公告)日：2010-02-23
申请号：US10575452
申请日：2005-04-20
申请人： Kok Seng Chong , Sua Hong Neo , Naoya Tanaka , Takeshi Norimatsu
发明人： Kok Seng Chong , Sua Hong Neo , Naoya Tanaka , Takeshi Norimatsu
IPC分类号： G10L19/00
CPC分类号： G10L19/032
摘要： According to the present invention, it is possible to calculate appropriate chirp factor and noise component amount with a little processing amount.Input subband signal is segmented into a plurality of ranges by a range segmentation unit 101. The range segmentation is performed for energy value calculation, chirp factor calculation, noise component calculation, and tone component calculation, respectively, and determined range segmentation information ei, bi, qi, and hi are outputted. Respective processing for the energy calculation, the chirp factor calculation, the tone component calculation, and the noise component calculation are performed sequentially for the respective corresponding ranges. By using linear prediction processing, it is possible to obtain an parameter having higher accuracy with a little operation amount.
摘要翻译：根据本发明，可以以少量的处理量来计算适当的啁啾因子和噪声成分量。通过距离分割单元101将输入子带信号分割成多个范围。对能量值计算，啁啾因子计算，噪声分量计算和色调分量计算分别执行范围分割，并且确定范围分割信息ei，bi ，qi和hi。针对各个对应的范围顺序地进行能量计算，啁啾因子计算，色调分量计算和噪声分量计算的各个处理。通过使用线性预测处理，可以以少量的操作量获得具有较高精度的参数。

8. 发明授权

US07451091B2 Method for determining time borders and frequency resolutions for spectral envelope coding 有权
标题翻译：用于确定频谱包络编码的时间边界和频率分辨率的方法
公开(公告)号：US07451091B2
公开(公告)日：2008-11-11
申请号：US10567601
申请日：2004-10-04
申请人： Kok Seng Chong , Sua Hong Neo , Naoya Tanaka , Takeshi Norimatsu
发明人： Kok Seng Chong , Sua Hong Neo , Naoya Tanaka , Takeshi Norimatsu
IPC分类号： G10L21/04
CPC分类号： G10L21/038 , G10L19/025 , H04B1/667
摘要： A frame type for a current SBR frame is determined according to a type of end border of a previous frame, as well as presence of a transient in the current SBR frame. A start border is determined according to the end border of the previous SBR frame. For a FIXFIX frame, a low time-resolution setting is used. For a FIXVAR or a VARVAR frame, a search for intermediate borders is conducted in the region between the transient and maximum allowed end border location. The end border is also determined at this stage. If there is excess capacity for more borders, another search is conducted in the region between the transient and the start border. For a VARFIX frame, only one search needs to be conducted, in the whole region partitioned by a variable start border and a fixed end border. All of the above are accomplished with two Forward Search operations and one Backward Search operation. They employ the same principle, which is based on evaluating the signal variation of a time segment, but with minor variations to suit the scenarios in which they are applied.
摘要翻译：根据前一帧的结束边界的类型以及当前SBR帧中的瞬态的存在来确定当前SBR帧的帧类型。根据先前SBR帧的结束边界确定开始边界。对于FIXFIX框架，使用低时间分辨率设置。对于FIXVAR或VARVAR帧，在瞬态和允许的最终边界位置之间的区域中进行中间边界的搜索。终点边界也是在这个阶段确定的。如果越多边界的容量过剩，则在暂时和起始边界之间的区域进行另一次搜索。对于VARFIX框架，只需要进行一次搜索，在整个区域中由可变起始边框和固定边框划分。以上都是通过两次前向搜索操作和一个向后搜索操作实现的。它们采用相同的原理，其基于评估时间段的信号变化，但是具有适应其应用场景的较小变化。

9. 发明授权

US07283967B2 Encoding device decoding device 有权
标题翻译：编码设备解码设备
公开(公告)号：US07283967B2
公开(公告)日：2007-10-16
申请号：US10285609
申请日：2002-11-01
申请人： Kosuke Nishio , Mineo Tsushima , Naoya Tanaka , Takeshi Norimatsu
发明人： Kosuke Nishio , Mineo Tsushima , Naoya Tanaka , Takeshi Norimatsu
IPC分类号： G10L19/00
CPC分类号： G10L21/038 , G10L19/0208
摘要： An encoding device (100) includes (i) a first encoding unit (132) that encodes spectral data in the lower frequency band represented by a plularity of parameters, out of the spectral data obtained by transforming an audio signal inputted for a fixed time length, (ii) a second quantizing unit (133) that generates sub information representing characteristics of the spectral data in the higher frequency by fewer parameters than those for the lower frequency band, out of the spectral data obtained by the transformation, (iii) a second encoding unit (134) that encodes the generated sub information, and (iv) a stream output unit (140) that outputs the data encoded by the first encoding unit (132) and the data encoded by the second encoding unit (134).
摘要翻译：一种编码装置（100）包括：（i）第一编码单元（132），其通过将输入的固定时间长度的音频信号变换得到的频谱数据中编码由参数的多样性表示的较低频带中的频谱数据，（ii）第二量化单元（133），通过变换获得的频谱数据，产生表示较低频带的频谱数据的频谱数据的特性的子信息，（iii）编码所生成的子信息的第二编码单元（134），以及（iv）输出由第一编码单元（132）编码的数据和由第二编码单元（134）编码的数据的流输出单元（140）。

10. 发明授权

US07246065B2 Band-division encoder utilizing a plurality of encoding units 有权
标题翻译：带分割编码器利用多个编码单元
公开(公告)号：US07246065B2
公开(公告)日：2007-07-17
申请号：US10353019
申请日：2003-01-29
申请人： Naoya Tanaka , Mineo Tsushima , Takeshi Norimatsu
发明人： Naoya Tanaka , Mineo Tsushima , Takeshi Norimatsu
IPC分类号： G10L19/00 , G10L21/00
CPC分类号： H04N19/61 , H04N19/63
摘要： An encoding device (200) is comprised of a band dividing unit (201) that divides an input signal (207) into a low frequency signal (208) representing a signal in the lower frequency band and a high frequency signal (209) representing a signal in the higher frequency band, a lower frequency band encoding unit (202) that encodes the low frequency signal (208) and generates a low frequency code (213), a similarity judging unit (203) that judges similarity between the high frequency signal (209) and the low frequency signal (208) and generates switching information (210), “n” higher frequency band encoding units 205 that encode the high frequency signal (209) through respective encoding methods and generate a high frequency code (212), a switching unit (204) that selects one of the higher frequency band encoding units (205) and has the selected higher frequency band encoding unit (205) perform encoding, and a code multiplexing unit (206) that multiplexes the low frequency code (213), the high frequency code (212) and the switching information (210), and generates an output code (214).
摘要翻译：编码装置（200）由将输入信号（207）分割为表示较低频带的信号的低频信号（208）的频带划分单元（201）和表示低频信号的高频信号信号，较低频率编码单元（202），编码低频信号（208）并产生低频码（213）;相似度判断单元（203），其判断高频信号（209）和低频信号（208），并且通过各种编码方法产生切换信息（210）“n”个编码高频信号（209）的较高频带编码单元205，并生成高频码（212），选择所述较高频带编码单元（205）之一并具有所选择的较高频带编码单元（205）进行编码的切换单元（204），以及多路复用低频码（213），高频码（212）和切换信息（210），并产生输出码（214）。

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