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21. 发明授权

US08930198B2 Low bitrate audio encoding/decoding scheme having cascaded switches 有权
标题翻译：具有级联交换机的低比特率音频编码/解码方案
公开(公告)号：US08930198B2
公开(公告)日：2015-01-06
申请号：US13004385
申请日：2011-01-11
申请人： Bernhard Grill , Roch Lefebvre , Bruno Bessette , Jimmy Lapierre , Philippe Gournay , Redwan Salami , Stefan Bayer , Guillaume Fuchs , Stefan Geyersberger , Ralf Geiger , Johannes Hilpert , Ulrich Kraemer , Jeremie Lecomte , Markus Multrus , Max Neuendorf , Harald Popp , Nikolaus Rettelbach
发明人： Bernhard Grill , Roch Lefebvre , Bruno Bessette , Jimmy Lapierre , Philippe Gournay , Redwan Salami , Stefan Bayer , Guillaume Fuchs , Stefan Geyersberger , Ralf Geiger , Johannes Hilpert , Ulrich Kraemer , Jeremie Lecomte , Markus Multrus , Max Neuendorf , Harald Popp , Nikolaus Rettelbach
IPC分类号： G10L19/00 , G10L19/18 , G10L19/16 , G10L19/008 , G10L19/02
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/0212 , G10L19/173 , G10L19/18 , G10L2019/0008
摘要： An audio encoder has a first information sink oriented encoding branch, a second information source or SNR oriented encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch has a converter into a specific domain different from the spectral domain, and wherein the second encoding branch furthermore has a specific domain coding branch, and a specific spectral domain coding branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder has a first domain decoder, a second domain decoder for decoding a signal, and a third domain decoder and two cascaded switches for switching between the decoders.
摘要翻译：音频编码器具有第一信息汇集编码分支，第二信息源或SNR定向编码分支，以及用于在第一编码分支和第二编码分支之间进行切换的开关，其中第二编码分支具有转换器到特定的域并且其中第二编码分支还具有特定的域编码分支，以及特定频域编码分支，以及用于在特定的域编码分支与特定频域编码分支之间切换的附加开关。音频解码器具有第一域解码器，用于对信号进行解码的第二域解码器，以及用于在解码器之间切换的第三域解码器和两个级联开关。

22. 发明授权

US08332213B2 Multi-reference LPC filter quantization and inverse quantization device and method 有权
标题翻译：多参考LPC滤波器量化和逆量化设备及方法
公开(公告)号：US08332213B2
公开(公告)日：2012-12-11
申请号：US12501188
申请日：2009-07-10
申请人： Philippe Gournay , Bruno Bessette , Redwan Salami
发明人： Philippe Gournay , Bruno Bessette , Redwan Salami
IPC分类号： G10L21/00
CPC分类号： G10L19/06 , G10L19/18 , H03M7/3082
摘要： A multi-reference quantization device and method for quantizing an input LPC filter, comprises a plurality of differential quantizers using respective, different references, and a selector of a reference amongst the different references of the differential quantizers using a reference selection criterion. The input LPC filter is differentially quantized by the differential quantizer using the selected reference. A device and method for inverse quantizing a multi-reference differentially quantized LPC filter extracted from a bitstream, comprises an extractor from the bitstream of information about a reference amongst a plurality of possible references used for quantizing the multi-reference differentially quantized LPC filter, and a differential inverse quantizer using the reference corresponding to the extracted reference information to inverse quantize the multi-reference differentially quantized LPC filter.
摘要翻译：用于量化输入LPC滤波器的多参考量化装置和方法包括使用各自不同参考的多个差分量化器和使用参考选择准则的差分量化器的不同参考中的参考选择器。输入LPC滤波器通过使用所选参考的差分量化器进行差分量化。一种用于对从比特流提取的多参考差分量化LPC滤波器进行逆量化的装置和方法，包括来自比特流的提取器，该信息涉及用于量化多参考差分量化LPC滤波器的多个可能参考中的参考，以及使用对应于所提取的参考信息的参考来对多参考差分量化LPC滤波器进行逆量化的差分逆量化器。

23. 发明申请

US20050108007A1 Perceptual weighting device and method for efficient coding of wideband signals 审中-公开
标题翻译：用于有效编码宽带信号的感知加权装置和方法
公开(公告)号：US20050108007A1
公开(公告)日：2005-05-19
申请号：US10965795
申请日：2004-10-18
申请人： Bruno Bessette , Redwan Salami , Roch Lefebvre
发明人： Bruno Bessette , Redwan Salami , Roch Lefebvre
IPC分类号： G01L11/04 , G01L21/02 , G10L13/00 , G10L19/12 , H03H17/06 , H03M7/30 , H03M7/36 , H04B1/62 , H04B7/26 , H04B14/04 , H04Q7/22 , H04Q7/32 , G10L19/00
CPC分类号： G10L19/26 , G10L2019/0011
摘要： A perceptual weighting device for producing a perceptually weighted signal in response to a wideband signal comprises a signal pre-emphasis filter, a synthesis filter calculator, and a perceptual weighting filter. The signal pre-emphasis filter enhances the high frequency content of the wideband signal to thereby produce a pre-emphasized signal. The signal pre-emphasis filter has a transfer function of the form: P(z)=1−μz−1, wherein μ is a pre-emphasis factor having a value located between 0 and 1. The synthesis filter calculator is responsive to the pre-emphasized signal for producing synthesis filter coefficients. Finally, the perceptual weighting filter processes the pre-emphasized signal in relation to the synthesis filter coefficients to produce the perceptually weighted signal. The perceptual weighting filter has a transfer function, with fixed denominator, of the form: W(z)=A(z/γ1)/(1−γ2z−1) where 0
摘要翻译：用于响应于宽带信号产生感知加权信号的感知加权装置包括信号预加重滤波器，合成滤波器计算器和感知加权滤波器。信号预加重滤波器增强了宽带信号的高频内容，从而产生预加重信号。信号预加重滤波器具有以下形式的传递函数：P（z）= 1-muz -1，其中mu是具有位于0和1之间的值的预加重因子。合成滤波器计算器响应预加重信号以产生合成滤波器系数。最后，感知加权滤波器处理关于合成滤波器系数的预加重信号以产生感知加权信号。感知加权滤波器具有如下形式的具有固定分母的传递函数：W（z）= A（z /γ1/ 2）/（1-γ2 其中0 <γ2<1 <1> <1> <1>

24. 发明申请

US20120271644A1 AUDIO SIGNAL ENCODER, AUDIO SIGNAL DECODER, METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING AN ALIASING-CANCELLATION 有权
标题翻译：音频信号编码器，音频信号解码器，使用消息取消来编码或解码音频信号的方法
公开(公告)号：US20120271644A1
公开(公告)日：2012-10-25
申请号：US13449949
申请日：2012-04-18
申请人： Bruno Bessette , Max Neuendorf , Ralf Geiger , Philippe Gournay , Roch Lefebvre , Bernhard Grill , Jeremie Lecomte , Stefan Bayer , Nikolaus Rettelbach , Lars Villemoes , Redwan Salami , Albertus C. Den Brinker
发明人： Bruno Bessette , Max Neuendorf , Ralf Geiger , Philippe Gournay , Roch Lefebvre , Bernhard Grill , Jeremie Lecomte , Stefan Bayer , Nikolaus Rettelbach , Lars Villemoes , Redwan Salami , Albertus C. Den Brinker
IPC分类号： G10L19/12
CPC分类号： G10L19/03 , G10L19/0212 , G10L19/20 , G10L2019/0008
摘要： An audio signal decoder includes a transform domain path configured to obtain a time-domain representation of a portion of an audio content on the basis of a first set of spectral coefficients, a representation of an aliasing-cancellation stimulus signal and a plurality of linear-prediction-domain parameters. The transform domain path applies a spectrum shaping to the first set of spectral coefficients to obtain a spectrally-shaped version thereof. The transform domain path obtains a time-domain representation of the audio content on the basis of the spectrally-shaped version of the first set of spectral coefficients. The transform domain path includes an aliasing-cancellation stimulus filter to filter the aliasing-cancellation stimulus signal in dependence on at least a subset of the linear-prediction-domain parameters. The transform domain path also includes a combiner configured to combine the time-domain representation of the audio content with an aliasing-cancellation synthesis signal to obtain an aliasing reduced time-domain signal.
摘要翻译：音频信号解码器包括变换域路径，被配置为基于第一组频谱系数获得音频内容的一部分的时域表示，混叠取消激励信号的表示和多个线性 - 预测域参数。变换域路径将频谱整形应用于第一组频谱系数，以获得其频谱形状的版本。变换域路径基于第一组频谱系数的频谱形式获得音频内容的时域表示。变换域路径包括混叠消除刺激滤波器，以根据线性预测域参数的至少一个子集来滤除混叠消除激励信号。变换域路径还包括组合器，其被配置为将音频内容的时域表示与混叠消除合成信号组合以获得混叠减小的时域信号。

25. 发明申请

US20050108005A1 Method and device for adaptive bandwidth pitch search in coding wideband signals 审中-公开
标题翻译：用于编码宽带信号中的自适应带宽音调搜索的方法和装置
公开(公告)号：US20050108005A1
公开(公告)日：2005-05-19
申请号：US10964752
申请日：2004-10-15
申请人： Bruno Bessette , Redwan Salami , Roch Lefebvre
发明人： Bruno Bessette , Redwan Salami , Roch Lefebvre
IPC分类号： G01L11/04 , G01L21/02 , G10L13/00 , G10L19/12 , H03H17/06 , H03M7/30 , H03M7/36 , H04B1/62 , H04B7/26 , H04B14/04 , H04Q7/22 , H04Q7/32 , G10L11/04
CPC分类号： G10L19/26 , G10L2019/0011
摘要： A pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling of the harmonic structure of the speech spectrum uses several forms of low pass filters applied to a pitch codevector, the one yielding higher prediction gain (i.e. the lowest pitch prediction error) is selected and the associated pitch codebook parameters are forwarded.
摘要翻译：考虑到发送或存储和合成该宽带声音信号，用于对宽带信号进行数字编码的音调搜索方法和装置，特别地但不排他地是语音信号。实现语音频谱谐波结构的有效建模的新方法和装置使用几种形式的应用于音调码矢量的低通滤波器，选择产生较高预测增益（即，最低音调预测误差）的一种形式，并且相关音调码本参数被转发。

26. 发明授权

US06807524B1 Perceptual weighting device and method for efficient coding of wideband signals 有权
标题翻译：用于有效编码宽带信号的感知加权装置和方法
公开(公告)号：US06807524B1
公开(公告)日：2004-10-19
申请号：US09830276
申请日：2001-06-20
申请人： Bruno Bessette , Redwan Salami , Roch Lefebvre
发明人： Bruno Bessette , Redwan Salami , Roch Lefebvre
IPC分类号： G10L1904
CPC分类号： G10L19/26 , G10L2019/0011
摘要： A perceptual weighting device for producing a perceptually weighted signal in response to a wideband signal comprises a signal pre-emphasis filter, a synthesis filter calculator, and a perceptual weighting filter. The signal pre-emphasis filter enhances the high frequency content of the wideband signal to thereby produce a pre-emphasized signal. The signal pre-emphasis filter has a transfer function of the form: P(z)=1−&mgr;z−1, wherein &mgr; is a pre-emphasis factor having a value located between 0 and 1. The synthesis filter calculator is responsive to the pre-emphasized signal for producing synthesis filter coefficients. Finally, the perceptual weighting filter processes the pre-emphasized signal in relation to the synthesis filter coefficients to produce the perceptually weighted signal. The perceptual weighting filter has a transfer function, with fixed denominator, of the form: W (z)=A (z/&ggr;1)/(1−&ggr;2z−1) where 0
摘要翻译：用于响应于宽带信号产生感知加权信号的感知加权装置包括信号预加重滤波器，合成滤波器计算器和感知加权滤波器。信号预加重滤波器增强了宽带信号的高频内容，从而产生预加重信号。信号预加重滤波器具有以下形式的传递函数：P（z）= 1-muz -1，其中mu是具有位于0和1之间的值的预加重因子。合成滤波器计算器响应到用于产生合成滤波器系数的预加重信号。最后，感知加权滤波器处理关于合成滤波器系数的预加重信号以产生感知加权信号。感知加权滤波器具有固定分母的传递函数，其形式为：W（z）= A（z /γ1）/（1-gamma2z <-1>），其中0

27. 发明授权

US09245532B2 Variable bit rate LPC filter quantizing and inverse quantizing device and method 有权
标题翻译：可变比特率LPC滤波器量化和逆量化设备及方法
公开(公告)号：US09245532B2
公开(公告)日：2016-01-26
申请号：US12501201
申请日：2009-07-10
申请人： Philippe Gournay , Bruno Bessette , Redwan Salami
发明人： Philippe Gournay , Bruno Bessette , Redwan Salami
IPC分类号： G10L19/00 , G10L21/00 , G10L19/06 , H03M7/30 , G10L19/18
CPC分类号： G10L19/06 , G10L19/18 , H03M7/3082
摘要： A device and a method for quantizing a LPC filter in the form of an input vector in a quantization domain, comprises a calculator of a first-stage approximation of the input vector, a subtractor of the first-stage approximation from the input vector to produce a residual vector, a calculator of a weighting function from the first-stage approximation, a warper of the residual vector with the weighting function, and a quantizer of the weighted residual vector to supply a quantized weighted residual vector. A device and a method for inverse quantizing of a LPC filter, comprises means for receiving coded indices representative of a first-stage approximation of a vector representative of the LPC filter in a quantization domain and of a quantized weighted residual version of the vector, a calculator of an inverse weighting function from the first-stage approximation, an inverse quantizer of the quantized weighted residual version of the vector to produce a weighted residual vector, a multiplier of the weighted residual vector by the inverse weighting function to produce a residual vector, and an adder of the first-stage approximation with the residual vector to produce the vector representative of the LPC filter in the quantization domain.
摘要翻译：在量化域中以输入向量的形式对LPC滤波器进行量化的装置和方法包括：输入向量的第一级逼近的计算器，从输入向量产生的第一级逼近的减法器一个残差矢量，一个来自第一阶段逼近的加权函数的计算器，具有加权函数的残差向量的整经器，以及加权残差向量的量化器，以提供量化的加权残差向量。用于LPC滤波器的逆量化的装置和方法包括用于接收代表代表量化域中的LPC滤波器的矢量的第一级逼近的编码索引和矢量的量化加权残差版本的装置，来自第一阶段近似的逆加权函数的计算器，用于产生加权残差向量的向量的量化加权残差版本的逆量化器，通过逆加权函数的加权残差向量的乘数以产生残差向量，以及具有残差矢量的第一级近似的加法器，以产生代表量化域中的LPC滤波器的向量。

28. 发明申请

US20100023325A1 Variable Bit Rate LPC Filter Quantizing and Inverse Quantizing Device and Method 有权
标题翻译：可变比特率LPC滤波器量化和反量化设备和方法
公开(公告)号：US20100023325A1
公开(公告)日：2010-01-28
申请号：US12501201
申请日：2009-07-10
申请人： Bruno BESSETTE , Philippe Gournay , Redwan Salami
发明人： Bruno BESSETTE , Philippe Gournay , Redwan Salami
IPC分类号： G10L19/04
CPC分类号： G10L19/06 , G10L19/18 , H03M7/3082
摘要： A device and a method for quantizing a LPC filter in the form of an input vector in a quantization domain, comprises a calculator of a first-stage approximation of the input vector, a subtractor of the first-stage approximation from the input vector to produce a residual vector, a calculator of a weighting function from the first-stage approximation, a warper of the residual vector with the weighting function, and a quantizer of the weighted residual vector to supply a quantized weighted residual vector. A device and a method for inverse quantizing of a LPC filter, comprises means for receiving coded indices representative of a first-stage approximation of a vector representative of the LPC filter in a quantization domain and of a quantized weighted residual version of the vector, a calculator of an inverse weighting function from the first-stage approximation, an inverse quantizer of the quantized weighted residual version of the vector to produce a weighted residual vector, a multiplier of the weighted residual vector by the inverse weighting function to produce a residual vector, and an adder of the first-stage approximation with the residual vector to produce the vector representative of the LPC filter in the quantization domain.
摘要翻译：在量化域中以输入向量的形式对LPC滤波器进行量化的装置和方法包括：输入向量的第一级逼近的计算器，从输入向量产生的第一级逼近的减法器一个残差矢量，一个来自第一阶段逼近的加权函数的计算器，具有加权函数的残差向量的整经器，以及加权残差向量的量化器，以提供量化的加权残差向量。用于LPC滤波器的逆量化的装置和方法包括用于接收代表代表量化域中的LPC滤波器的矢量的第一级逼近的编码索引和矢量的量化加权残差版本的装置，来自第一阶段近似的逆加权函数的计算器，用于产生加权残差向量的向量的量化加权残差版本的逆量化器，通过逆加权函数的加权残差向量的乘数以产生残差向量，以及具有残差矢量的第一级近似的加法器，以产生代表量化域中的LPC滤波器的向量。

29. 发明授权

US07260521B1 Method and device for adaptive bandwidth pitch search in coding wideband signals 有权
标题翻译：用于编码宽带信号中的自适应带宽音调搜索的方法和装置
公开(公告)号：US07260521B1
公开(公告)日：2007-08-21
申请号：US09830114
申请日：1999-10-27
申请人： Bruno Bessette , Redwan Salami , Roch Lefebvre
发明人： Bruno Bessette , Redwan Salami , Roch Lefebvre
IPC分类号： G10L19/04
CPC分类号： G10L19/26 , G10L2019/0011
摘要： An improved pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling of the harmonic structure of the speech spectrum uses several forms of low pass filters applied to a pitch codevector, the one yielding higher prediction gain (i.e. the lowest pitch prediction error) is selected and the associated pitch codebook parameters are forwarded.
摘要翻译：鉴于发送或存储和合成该宽带声音信号，改进的音调搜索方法和装置用于数字编码宽带信号，特别地但不排除是语音信号。实现语音频谱谐波结构的有效建模的新方法和装置使用几种形式的应用于音调码矢量的低通滤波器，选择产生较高预测增益（即，最低音调预测误差）的一种形式，并且相关音调码本参数被转发。

30. 发明授权

US07151802B1 High frequency content recovering method and device for over-sampled synthesized wideband signal 有权
标题翻译：用于过采样合成宽带信号的高频内容恢复方法和装置
公开(公告)号：US07151802B1
公开(公告)日：2006-12-19
申请号：US09830332
申请日：1999-10-27
申请人： Bruno Bessette , Redwan Salami , Roch Lefebvre
发明人： Bruno Bessette , Redwan Salami , Roch Lefebvre
IPC分类号： H04L27/00 , G10L19/02 , G10L11/04
CPC分类号： G10L19/26 , G10L2019/0011
摘要： In a method and device for recovering the high frequency content of a wideband signal previously down-sampled, and for injecting this high frequency content in an over-sampled synthesized version of the wideband signal to produce a fill-spectrum synthesized wideband signal, a random noise generator produces a noise sequence having a given spectrum. A spectral shaping unit spectrally shapes the noise sequence in relation to linear prediction filter coefficients related to the down-sampled wideband signal. A signal injection circuit finally injects the spectrally-shaped noise sequence in the over-sampled synthesized signal version to thereby produce the full-spectrum synthesized wideband signal.
摘要翻译：在用于恢复先前下采样的宽带信号的高频内容的方法和装置中，并且用于在宽带信号的过采样合成版本中注入该高频内容以产生填充频谱合成宽带信号，随机噪声发生器产生具有给定频谱的噪声序列。光谱整形单元相对于与下采样宽带信号相关的线性预测滤波器系数，对噪声序列进行频谱成形。信号注入电路最终以过采样的合成信号版本注入频谱形状的噪声序列，从而产生全频谱合成的宽带信号。

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