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1. 发明申请

WO2012006770A1 AUDIO SIGNAL GENERATOR 审中-公开
标题翻译：音频信号发生器
公开(公告)号：WO2012006770A1
公开(公告)日：2012-01-19
申请号：PCT/CN2010/075107
申请日：2010-07-12
申请人： HUAWEI TECHNOLOGIES CO., LTD. , CHRISTOF, Faller , LANG, Yue , XU, Jianfeng
发明人： CHRISTOF, Faller , LANG, Yue , XU, Jianfeng
IPC分类号： H04S5/00
CPC分类号： H04S1/00 , G10L19/008 , H04S2400/03
摘要： The invention relates to an audio signal generator for generating a downmix audio signal from a multi-channel audio signal comprising a first audio channel signal and a second audio channel signal. The audio signal generator comprises a processor (103) for amending a phase of the first audio channel signal using a first phase shift coefficient, and/or for amending a phase of the second audio channel signal using a second phase shift coefficient to reduce signal cancellations when combining the resulting first and second audio channel signal, and a combiner (109) for combining the resulting first and second audio channel signal to obtain the downmix audio signal.
摘要翻译：本发明涉及一种音频信号发生器，用于从包括第一音频通道信号和第二音频通道信号的多声道音频信号产生下混音频信号。音频信号发生器包括：处理器（103），用于使用第一相移系数修正第一音频通道信号的相位;和/或用于使用第二相移系数修正第二音频通道信号的相位以减少信号取消当组合所得到的第一和第二音频信道信号时，以及组合器（109），用于组合所产生的第一和第二音频信道信号以获得下混音频信号。

2. 发明申请

WO2012058805A1 PARAMETRIC ENCODER FOR ENCODING A MULTI-CHANNEL AUDIO SIGNAL 审中-公开
标题翻译：编码多通道音频信号的参数编码器
公开(公告)号：WO2012058805A1
公开(公告)日：2012-05-10
申请号：PCT/CN2010/078358
申请日：2010-11-03
申请人： HUAWEI TECHNOLOGIES CO., LTD. , CHRISTOF, Faller , MIAO, Lei , LANG, Yue , XU, Jianfeng
发明人： CHRISTOF, Faller , MIAO, Lei , LANG, Yue , XU, Jianfeng
IPC分类号： G10L19/00 , G10L13/00
CPC分类号： G10L19/008 , G10L19/0204
摘要： A parametric encoder for encoding a multi-channel audio signal having a first audio signal and a second audio signal is provided. The parametric encoder has a transformer (101) for transforming the first audio signal into frequency domain to obtain a first transformed audio signal and for transforming the second audio signal into frequency domain to obtain a second transformed audio signal, a parameter generator (107) for generating a first encoding parameter from the first transformed audio signal and from the second transformed audio signal at a first frequency and for generating a second encoding parameter from the first transformed audio signal and from the second transformed audio signal at a second frequency, and a parameter combiner (109) for combining the first encoding parameter and the second encoding parameter to obtain a combined encoding parameter.
摘要翻译：提供了一种用于对具有第一音频信号和第二音频信号的多声道音频信号进行编码的参数编码器。参数编码器具有用于将第一音频信号变换为频域以获得第一变换音频信号并将第二音频信号变换为频域以获得第二变换音频信号的变压器（101），用于从第一变换音频信号和第二变换音频信号以第一频率生成第一编码参数，以及从第一变换音频信号和第二变换音频信号以第二频率产生第二编码参数，以及参数组合器（109），用于组合第一编码参数和第二编码参数以获得组合的编码参数。

3. 发明申请

WO2012009851A1 AUDIO SIGNAL SYNTHESIZER 审中-公开
标题翻译：音频信号合成器
公开(公告)号：WO2012009851A1
公开(公告)日：2012-01-26
申请号：PCT/CN2010/075308
申请日：2010-07-20
申请人： HUAWEI TECHNOLOGIES CO., LTD. , CHRISTOF, Faller , DAVID, Virette , LANG, Yue , XU, Jianfeng
发明人： CHRISTOF, Faller , DAVID, Virette , LANG, Yue , XU, Jianfeng
IPC分类号： G10L19/00 , H04S3/00 , H04S5/00
CPC分类号： G10L19/008
摘要： An audio signal synthesizer for synthesizing a multi-channel audio signal from a down-mix audio signal is provided. The audio signal synthesizer comprises: a transformer (101) for transforming the down-mix audio signal into frequency domain to obtain a transformed audio signal which represents a spectrum of the down-mix audio signal; a signal generator (103,201) for generating a first auxiliary signal, a second auxiliary signal and a third auxiliary signal upon the basis of the transformed audio signal; a de-correlator (105) for generating a first de-correlated signal and a second de-correlated signal from the third auxiliary signal, wherein the first de-correlated signal and the second de-correlated signal are at least partly de-correlated; and a combiner (107) for combining the first auxiliary signal with the first de-correlated signal to obtain a first audio signal, and for combining the second auxiliary signal with the second de-correlated signal to obtain a second audio signal, wherein the first audio signal and the second audio signal form the multi-channel audio signal.
摘要翻译：提供一种用于从缩混音频信号合成多声道音频信号的音频信号合成器。音频信号合成器包括：变换器（101），用于将混音音频信号变换成频域以获得表示缩混音频信号的频谱的变换音频信号; 用于基于经变换的音频信号产生第一辅助信号，第二辅助信号和第三辅助信号的信号发生器（103,201）; 用于从所述第三辅助信号产生第一去相关信号和第二去相关信号的去相关器（105），其中所述第一去相关信号和所述第二去相关信号至少部分地不相关; 以及组合器（107），用于将第一辅助信号与第一去相关信号组合以获得第一音频信号，并且用于将第二辅助信号与第二去相关信号组合以获得第二音频信号，其中第一音频信号和第二音频信号形成多声道音频信号。

4. 发明申请

WO2013149673A1 METHOD FOR INTER-CHANNEL DIFFERENCE ESTIMATION AND SPATIAL AUDIO CODING DEVICE 审中-公开
标题翻译：用于信道间差分估计和空间音频编码装置的方法
公开(公告)号：WO2013149673A1
公开(公告)日：2013-10-10
申请号：PCT/EP2012/056342
申请日：2012-04-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , LANG, Yue , VIRETTE, David , XU, Jianfeng
发明人： LANG, Yue , VIRETTE, David , XU, Jianfeng
IPC分类号： G10L19/008 , H04S3/00
CPC分类号： G10L19/008 , H04S3/008 , H04S2400/01 , H04S2420/01 , H04S2420/03
摘要： Methods and devices for a low complex inter-channel difference estimation are provided. A method for the estimation of inter-channel differences, ICD, comprises applying a transformation from a time domain to a frequency domain to a plurality of audio channel signals, calculating a plurality of ICD values for the ICDs between at least one of the plurality of audio channel signals and a reference audio channel signal over a predetermined frequency range, each ICD value being calculated over a portion of the predetermined frequency range, calculating, for each of the plurality of ICD values, a weighted ICD value by multiplying each of the plurality of ICD values with a corresponding frequency-dependent weighting factor, and calculating an ICD range value for the predetermined frequency range by adding the plurality of weighted ICD values.
摘要翻译：提供了用于低复杂信道间差分估计的方法和装置。用于估计信道间差异ICD的方法包括将从时域到频域的变换应用于多个音频信道信号，在多个信道中的至少一个之间计算ICD的多个ICD值音频通道信号和参考音频通道信号，每个ICD值在预定频率范围的一部分上被计算，对于多个ICD值中的每一个，通过将多个ICD值中的每一个乘以加权ICD值具有对应的频率相关加权因子的ICD值，并且通过添加多个加权ICD值来计算预定频率范围的ICD范围值。

5. 发明申请

WO2013149671A1 MULTI-CHANNEL AUDIO ENCODER AND METHOD FOR ENCODING A MULTI-CHANNEL AUDIO SIGNAL 审中-公开
标题翻译：多频道音频编码器和编码多声道音频信号的方法
公开(公告)号：WO2013149671A1
公开(公告)日：2013-10-10
申请号：PCT/EP2012/056321
申请日：2012-04-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , VIRETTE, David , LANG, Yue , XU, Jianfeng
发明人： VIRETTE, David , LANG, Yue , XU, Jianfeng
IPC分类号： G10L19/00 , G10L19/02
CPC分类号： G10L19/008 , G10L19/0204
摘要： The invention relates to a method (100) for determining an encoding parameter (ITD) for an audio channel signal (X i ) of a plurality of audio channel signals (X 1 , X 2 ) of a multi-channel audio signal, the method comprising: determining (105) inter channel differences (CD[b]) for at least each frequency sub-band (b) of a subset of frequency subbands, each inter channel difference indicating a phase difference (I PD[b]) or time difference (ITD[b]) between a band-limited signal portion of an audio channel signal and a band-limited signal portion of a reference audio signal in the respective frequency sub-band (b) the inter-channel difference is associated to; determining (107) a first average (ITD mean _p OS ) based on positive values of the inter-channel differences (ICD[b]) and determining a second average (ITD mean_ neg ) based on negative values of the inter-channel differences (ICD[b]); and determining (109) the encoding parameter (ITD) based on the first average and on the second average.
摘要翻译：本发明涉及一种用于确定多声道音频信号的多个音频信道信号（X1，X2）的音频信道信号（Xi）的编码参数（ITD）的方法（100），该方法包括：确定对于频率子带子集的至少每个频率子带（b），每个信道间差异（I PD [b]）或时间差（ITD）的信道差（CD [b]）音频信道信号的频带限制信号部分和各个频率子带（b）中的参考音频信号的频带限制信号部分之间的信道间差分相关联; 基于信道间差异（ICD [b]）的正值确定（107）第一平均值（ITDmean_pOS）并且基于信道间差异的负值（ICD [b]）确定第二平均值（ITDmean_ neg））; 以及基于所述第一平均值和所述第二平均值来确定（109）所述编码参数（ITD）。

6. 发明申请

WO2013149670A1 METHOD FOR PARAMETRIC SPATIAL AUDIO CODING AND DECODING, PARAMETRIC SPATIAL AUDIO CODER AND PARAMETRIC SPATIAL AUDIO DECODER 审中-公开
标题翻译：参考空间音频编码和解码方法，参考空间音频编码器和参考空间音频解码器
公开(公告)号：WO2013149670A1
公开(公告)日：2013-10-10
申请号：PCT/EP2012/056319
申请日：2012-04-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , VIRETTE, David , LANG, Yue , XU, Jianfeng
发明人： VIRETTE, David , LANG, Yue , XU, Jianfeng
IPC分类号： G10L19/008 , H04S3/00
CPC分类号： G10L19/008 , H04S3/00
摘要： A method for parametric spatial audio coding of a multi-channel audio signal comprising a plurality of audio channel signals is provided, the method comprising: calculating at least two different spatial coding parameters for an audio channel signal of the plurality of audio channel signals, wherein the at least two different spatial coding parameters are of at least two different types of spatial coding parameters and are calculated with regard to a reference audio signal, wherein the reference audio signal is another audio channel signal of the plurality of audio channel signals or a downmix audio signal derived from at least two audio channel signals of the plurality of audio channel signals; selecting at least one spatial coding parameter of the at least two different spatial coding parameters associated with the audio channel signal on the basis of the values of the calculated spatial coding parameters; including a quantized representation of the selected spatial coding parameter into a parameter section (1b) of an audio bitstream (1); and setting a parameter type flag in the parameter section (1b) of the audio bitstream (1) indicating the type of the selected spatial coding parameter being included into the audio bitstream (1).
摘要翻译：提供了一种包括多个音频信道信号的多声道音频信号的参数空间音频编码的方法，所述方法包括：为所述多个音频信道信号的音频信道信号计算至少两个不同的空间编码参数，其中所述至少两个不同的空间编码参数是至少两种不同类型的空间编码参数，并且关于参考音频信号被计算，其中所述参考音频信号是所述多个音频信道信号中的另一个音频信道信号或下混合音频信号从多个音频信道信号的至少两个音频信道信号中得出; 基于所计算的空间编码参数的值，选择与音频信道信号相关联的至少两个不同的空间编码参数中的至少一个空间编码参数; 包括所选择的空间编码参数的量化表示到音频比特流（1）的参数部分（1b）中; 并且在音频比特流（1）的参数部分（1b）中设置参数类型标志，该参数部分指示所包含的音频比特流（1）中所选择的空间编码参数的类型。

7. 发明申请

WO2013120531A1 PARAMETRIC ENCODER FOR ENCODING A MULTI-CHANNEL AUDIO SIGNAL 审中-公开
标题翻译：编码多通道音频信号的参数编码器
公开(公告)号：WO2013120531A1
公开(公告)日：2013-08-22
申请号：PCT/EP2012/052734
申请日：2012-02-17
申请人： HUAWEI TECHNOLOGIES CO., LTD. , LANG, Yue , VIRETTE, David , XU, Jianfeng
发明人： LANG, Yue , VIRETTE, David , XU, Jianfeng
IPC分类号： H04S3/00 , G10L19/00
CPC分类号： G10L19/008 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： The invention relates to a parametric audio encoder (100) for generating an encoding parameter (ICC) for an audio channel signal (X 1 [b]) of a plurality of audio channel signals (X 1 [b], X 2 [b]) of a multi-channel audio signal, each audio channel signal (X 1 [b], X 2 [b]) having audio channel signal values (X 1 [k], X 2 [k]), the parametric audio encoder (100) comprising a parameter generator (105), the parameter generator (105) being configured - to determine for the audio channel signal (X 1 [b]) of the plurality of audio channel signals a first set of encoding parameters (IPD[b]) from the audio channel signal values (X 1 [k]) of the audio channel signal (X 1 [b]) and reference audio signal values (X 2 [k]) of a reference audio signal (X 2 [b]), wherein the reference audio signal is another audio channel signal (X 2 [b]) of the plurality of audio channel signals or a downmix audio signal derived from at least two audio channel signals of the plurality of multi-channel audio signals, - to determine for the audio channel signal (X1[b]) a first encoding parameter average (IPD mean [i]) based on the first set of encoding parameters (IPD[b]) of the audio channel signal (X 1 [b]), - to determine for the audio channel signal (X 1 [b]) a second encoding parameter average (IPD mean_long_term )based on the first encoding parameter average (IPD mean [i]) of the audio channel sigmean_long_termnal (X 1 [b]) and at least one other first encoding parameter average (IPD mean [i-1]) of the audio channel signal (X 1 [b]), and - to determine the encoding parameter (ICC) based on the first encoding parameter average (IPD mean [i]) of the audio channel signal (X1[b]) and the second encoding parameter average (IPD mean_long_term ) of the audio channel signal (X 1 [b]).
摘要翻译：本发明涉及一种用于为多个音频信道信号（X1 [b]，X2 [b]）的音频信道信号（X1 [b]）生成编码参数（ICC）的参数音频编码器（100）具有音频信道信号值（X1 [k]，X2 [k]）的每个音频信道信号（X1 [b]，X2 [b]），参数音频编码器（100） 105），所述参数发生器（105）被配置为从所述音频信道信号值确定所述多个音频信道信号中的音频信道信号（X1 [b]）第一组编码参数（IPD [b]）（X1 [b]）的音频信号（X1 [k]）和参考音频信号（X2 [b]）的参考音频信号值（X2 [k]），其中参考音频信号是另一声道信号（X2 [b]）或由多个多声道音频信号中的至少两个音频信道信号导出的下混合音频信号，以确定音频通道信号（X1 [b]）基于音频通道信号（X1 [b]）的第一组编码参数（IPD [b]））的第一编码参数平均值（IPDmean [i]），以确定基于音频信道sigmean_long_termnal（X1 [b]）的第一编码参数平均值（IPDmean [i]）和至少一个其他第一编码参数的音频信道信号（X1 [b]）第二编码参数平均值（IPDmean_long_term）（X1 [b]）的平均值（IPDmean [i-1]），以及 - 基于音频信道信号的第一编码参数平均值（IPDmean [i]）来确定编码参数（ICC） X1 [b]）和音频通道信号（X1 [b]）的第二编码参数平均值（IPDmean_long_term）。

8. 发明申请

WO2012045203A1 METHOD AND APPARATUS FOR ENCODING/DECODING MULTICHANNEL AUDIO SIGNAL 审中-公开
标题翻译：编码/解码多通道音频信号的方法和装置
公开(公告)号：WO2012045203A1
公开(公告)日：2012-04-12
申请号：PCT/CN2010/077571
申请日：2010-10-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , VIRETTE, David , LANG, Yue , XU, Jianfeng
发明人： VIRETTE, David , LANG, Yue , XU, Jianfeng
IPC分类号： G10L19/00 , H04S3/02
CPC分类号： G10L19/008 , G10L25/06
摘要： A method and apparatus for decoding a multichannel audio signal is provided, wherein the method comprises the steps of receiving a downmix audio signal (SD) and an interchannel cross correlation parameter (ICCi); deriving (S42) an interchannel phase difference parameter (IPDi) from the received interchannel cross correlation parameter (ICCi); and calculating (S43) a decoded multichannel audio signal for the received downmix audio signal (SD) depending on the derived interchannel phase difference parameter (IPDi).
摘要翻译：提供一种用于对多声道音频信号进行解码的方法和装置，其中该方法包括以下步骤：接收下混合音频信号（SD）和通道间相互关联参数（ICCi）; 从所接收的信道间相互关联参数（ICCi）中导出（S42）信道间相位差参数（IPDi）; 以及根据导出的信道间相位差参数（IPDi），计算（S43）所接收的下混音频信号（SD）的解码多声道音频信号。

9. 发明申请

WO2013149672A1 METHOD FOR DETERMINING AN ENCODING PARAMETER FOR A MULTI-CHANNEL AUDIO SIGNAL AND MULTI-CHANNEL AUDIO ENCODER 审中-公开
标题翻译：用于确定多通道音频信号和多通道音频编码器的编码参数的方法
公开(公告)号：WO2013149672A1
公开(公告)日：2013-10-10
申请号：PCT/EP2012/056340
申请日：2012-04-05
申请人： HUAWEI TECHNOLOGIES CO., LTD. , VIRETTE, David , LANG, Yue , XU, Jianfeng
发明人： VIRETTE, David , LANG, Yue , XU, Jianfeng
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L25/06
摘要： The invention relates to a method (100) for determining an encoding parameter (ITD) for an audio channel signal (x 1 ) of a plurality of audio channel signals (x 1 , x 2 ) of a multi-channel audio signal, each audio channel signal (x 1 , x 2 ) having audio channel signal values (x 1 [n], X 2 [n]), the method comprising: determining (101) for the audio channel signal (x 1 ) a set of functions (c[b]) from the audio channel signal values (x 1 [n]) of the audio channel signal (x 1 ) and reference audio signal values (X 2 [n]) of a reference audio signal (x 2 ), wherein the reference audio signal is another audio channel signal (x 2 ) of the plurality of audio channel signals or a down-mix audio signal derived from at least two audio channel signals (x 1 , x 2 ) of the plurality of multi-channel audio signals; determining (103) a first set of encoding parameters (ITD[b]) based on a smoothing of the set of functions (c[b]) with respect to a frame sequence (i) of the multi-channel audio signal, the smoothing being based on a first smoothing coefficient (SMW 1 ); determining (105) a second set of encoding parameters (ITD_inst[b]) based on a smoothing of the set of functions (c[b]) with respect to the frame sequence (i) of the multi-channel audio signal, the smoothing being based on a second smoothing coefficient (SMW 2 ); and determining (107) the encoding parameter (ITD, CLD) based on a quality criterion with respect to the first set of encoding parameters (ITD[b]) and/or the second set of encoding parameters (ITD_inst[b]).
摘要翻译：本发明涉及一种用于确定多声道音频信号的多个音频信道信号（x1，x2）的音频信道信号（x1）的编码参数（ITD）的方法（100），每个音频信道信号具有音频信道信号值（x1 [n]，X2 [n]）的方法，包括：从音频确定（101）音频信道信号（x1）一组函数（c [b]）音频通道信号（x1）的通道信号值（x1 [n]）和参考音频信号（x2）的参考音频信号值（X2 [n]），其中参考音频信号是另一声道信号信号（x2）或从多个多声道音频信号中的至少两个音频信道信号（x1，x2）导出的缩混音频信号; 基于对多声道音频信号的帧序列（i）的函数集（c [b]）的平滑化，确定（103）第一组编码参数（ITD [b]），平滑化基于第一平滑系数（SMW1）; 基于对多声道音频信号的帧序列（i）的函数集（c [b]）的平滑化，确定（105）第二组编码参数（ITD_inst [b]），平滑化基于第二平滑系数（SMW2）; 以及基于关于第一组编码参数（ITD [b]）和/或第二组编码参数（ITD_inst [b]）的质量标准来确定（107）编码参数（ITD，CLD）。

10. 发明申请

WO2015113601A1 AN AUDIO COMPRESSION SYSTEM FOR COMPRESSING AN AUDIO SIGNAL 审中-公开
标题翻译：用于压缩音频信号的音频压缩系统
公开(公告)号：WO2015113601A1
公开(公告)日：2015-08-06
申请号：PCT/EP2014/051794
申请日：2014-01-30
申请人： HUAWEI TECHNOLOGIES CO., LTD. , GROSCHE, Peter , LANG, Yue , ZHANG, Qing
发明人： GROSCHE, Peter , LANG, Yue , ZHANG, Qing
IPC分类号： H03G7/00
CPC分类号： H03G3/002 , G10L19/26 , H03G7/002 , H03G7/007 , H03G11/008 , H04S7/307
摘要： The invention relates to an audio compression system (100) for compressing an input audio signal, the audio compression system (100) comprising a digital filter (101) for filtering the input audio signal, the digital filter (101) comprising a frequency transfer function having a magnitude over frequency, the magnitude being formed by an equal loudness curve of a human ear to obtain a filtered audio signal, and a compressor (103) being configured to compress the input audio signal upon the basis of the filtered audio signal to obtain a compressed audio signal.
摘要翻译：本发明涉及一种用于压缩输入音频信号的音频压缩系统（100），该音频压缩系统（100）包括用于对输入音频信号进行滤波的数字滤波器（101），数字滤波器（101）包括频率传递函数具有超过频率的幅度，幅度由人耳的相等的响度曲线形成以获得滤波的音频信号，以及压缩器（103），其被配置为基于经滤波的音频信号来压缩输入音频信号，以获得压缩音频信号。

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