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11. 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。

12. 发明授权

US07752039B2 Method and device for low bit rate speech coding 有权
标题翻译：低比特率语音编码的方法和装置
公开(公告)号：US07752039B2
公开(公告)日：2010-07-06
申请号：US11265440
申请日：2005-11-01
申请人： Bruno Bessette
发明人： Bruno Bessette
IPC分类号： G10L19/12 , G10L19/14 , G10L19/02
CPC分类号： G10L19/12
摘要： A method for coding speech or other generic signals includes dividing a speech signal into a plurality of frames, and dividing at least one of the plurality of frames into at least two subframe units. A search for a fixed codebook contribution and an adaptive codebook contribution for subframe units is conducted. At least one subframe unit is selected to be coded without the fixed codebook contribution. The encoder may iteratively arrange and encode subframes differently for the same frame, and select for transmission that arrangement that minimizes an error measure across the frame. Various embodiments are shown, as are embodied computer programs, a decoder, and a communication system.
摘要翻译：用于对语音或其他通用信号进行编码的方法包括将语音信号划分为多个帧，并将多个帧中的至少一个划分为至少两个子帧单元。进行对子帧单元的固定码本贡献和自适应码本贡献的搜索。选择至少一个子帧单元进行编码，而不需要固定码本贡献。编码器可以针对相同的帧不同地迭代地布置和编码子帧，并且选择用于传输使跨越帧的误差测量最小化的布置。示出了各种实施例，如具体的计算机程序，解码器和通信系统。

13. 发明申请

US20070225971A1 Methods and devices for low-frequency emphasis during audio compression based on ACELP/TCX 有权
公开(公告)号：US20070225971A1
公开(公告)日：2007-09-27
申请号：US11708097
申请日：2007-02-15
申请人： Bruno Bessette
发明人： Bruno Bessette
IPC分类号： G10L19/02
CPC分类号： G10L19/0208 , G10L19/005 , G10L19/24 , G10L19/265 , G10L21/0232
摘要： A first aspect of the present invention relates to a method for low-frequency emphasizing the spectrum of a sound signal transformed in a frequency domain and comprising transform coefficients grouped in a number of blocks, in which a maximum energy for one block is calculated and a position index of the block with maximum energy is determined, a factor is calculated for each block having a position index smaller than the position index of the block with maximum energy the calculated maximum energy and the energy of the block, and, for each block, a gain determining from the factor is applied to the transform coefficients of the block. Another aspect of the invention is concerned with an HF coding method for coding, through a bandwidth extension scheme, an HF signal obtained from separation of a full-bandwidth sound signal into the HF signal and a LF signal, in which an estimation of the an HF gain is calculated from LPC coefficients, the energy of the HF signal is calculated, the LF signal is processed to produce a synthesized version of the HF signal, the energy of the synthesized version of the HF signal is calculated, a ratio between the energy of the HF signal and the energy of the synthesized version of the HF signal is calculated and expressing as an HF gain, and a difference between the estimation of the HF gain and the HF gain is calculated to obtain a gain correction. A third aspect of the invention is concerned with a method for producing from a decoded target signal an overlap-add target signal in a current frame coded according to a first coding mode. According to this method, the decoded target signal of the current frame is windowed and a left portion of the window is skipped. A zero-input response of a weighting filter of the previous frame coded according to a second coding mode is calculated and windowed so that the zero-input response has an amplitude monotonically decreasing to zero after a predetermined time period. Finally, the calculated zero-input response is added to the decoded target signal to reconstruct the overlap-add target signal.

14. 发明申请

US20070147518A1 Methods and devices for low-frequency emphasis during audio compression based on ACELP/TCX 审中-公开
公开(公告)号：US20070147518A1
公开(公告)日：2007-06-28
申请号：US11708073
申请日：2007-02-15
申请人： Bruno Bessette
发明人： Bruno Bessette
IPC分类号： H04B14/04
CPC分类号： G10L19/22 , G10L19/0212 , G10L19/12
摘要： A first aspect of the present invention relates to a method for low-frequency emphasizing the spectrum of a sound signal transformed in a frequency domain and comprising transform coefficients grouped in a number of blocks, in which a maximum energy for one block is calculated and a position index of the block with maximum energy is determined, a factor is calculated for each block having a position index smaller than the position index of the block with maximum energy the calculated maximum energy and the energy of the block, and, for each block, a gain determining from the factor is applied to the transform coefficients of the block. Another aspect of the invention is concerned with an HF coding method for coding, through a bandwidth extension scheme, an HF signal obtained from separation of a full-bandwidth sound signal into the HF signal and a LF signal, in which an estimation of the an HF gain is calculated from LPC coefficients, the energy of the HF signal is calculated, the LF signal is processed to produce a synthesized version of the HF signal, the energy of the synthesized version of the HF signal is calculated, a ratio between the energy of the HF signal and the energy of the synthesized version of the HF signal is calculated and expressing as an HF gain, and a difference between the estimation of the HF gain and the HF gain is calculated to obtain a gain correction. A third aspect of the invention is concerned with a method for producing from a decoded target signal an overlap-add target signal in a current frame coded according to a first coding mode. According to this method, the decoded target signal of the current frame is windowed and a left portion of the window is skipped. A zero-input response of a weighting filter of the previous frame coded according to a second coding mode is calculated and windowed so that the zero-input response has an amplitude monotonically decreasing to zero after a predetermined time period. Finally, the calculated zero-input response is added to the decoded target signal to reconstruct the overlap-add target signal.

15. 发明授权

US07106228B2 Method and system for multi-rate lattice vector quantization of a signal 有权
标题翻译：信号多速率格子矢量量化的方法和系统
公开(公告)号：US07106228B2
公开(公告)日：2006-09-12
申请号：US10515550
申请日：2003-05-30
申请人： Bruno Bessette , Stéphane Ragot , Jean-Pierre Adoul
发明人： Bruno Bessette , Stéphane Ragot , Jean-Pierre Adoul
IPC分类号： H03M7/00
CPC分类号： G10L19/10 , G10L19/06 , G10L2019/0008 , H03M7/3082
摘要： The present invention relates to a method and system for multi-rate lattice vector quantization of a source vector x representing a frame from a source signal to be used, for example, in digital transmission and storage systems. The multi-rate lattice quantization encoding method comprises the steps of associating to x a lattice point y in a unbounded lattice Λ; verifying if y is included in a base codebook C derived from the lattice Λ; if it is the case then indexing y in C so as to yield quantization indices if not then extending the base codebook using, for example a Voronoi based extension method, yielding an extended codebook; associating to y a codevector c from the extended codebook, and indexing y in the extended codebook C. The extension technique allows to obtain higher bit rate codebooks from the base codebooks compared to quantization method and system from the prior art.
摘要翻译：本发明涉及一种用于例如在数字传输和存储系统中使用的源信号的表示帧的源向量x的多速率格子矢量量化的方法和系统。多速率格子量化编码方法包括以下步骤：将x与无界格子λ中的格点y相关联; 验证y是否包括在从格子λ衍生的基本码本C中; 如果是这样的话，则在C中索引y，以便如果不是使用例如基于Voronoi的扩展方法扩展基本码本来产生量化索引，则产生扩展码本; 将来自扩展码本的码向量c与扩展码本C中的码向量c相关联。扩展技术允许从现有技术的量化方法和系统中获得来自基本码本的较高比特率码本。

16. 发明申请

US20050285764A1 Method and system for multi-rate lattice vector quantization of a signal 有权
标题翻译：信号多速率格子矢量量化的方法和系统
公开(公告)号：US20050285764A1
公开(公告)日：2005-12-29
申请号：US10515550
申请日：2003-05-30
申请人： Bruno Bessette , Stephane Ragot , Jean-Pierre Adoul
发明人： Bruno Bessette , Stephane Ragot , Jean-Pierre Adoul
IPC分类号： H03M1/00 , G10L19/038 , H03M3/00
CPC分类号： G10L19/10 , G10L19/06 , G10L2019/0008 , H03M7/3082
摘要： The present invention relates to a method and system for multi-rate lattice vector quantization of a source vector x representing a frame from a source signal to be used, for example, in digital transmission and storage systems. The multi-rate lattice quantization encoding method comprises the steps of associating to x a lattice point y in a unbounded lattice Λ; verifying if y is included in a base codebook C derived from the lattice Λ; if it is the case then indexing y in C so as to yield quantization indices if not then extending the base codebook using, for example a Voronoi based extension method, yielding an extended codebook; associating to y a codevector c from the extended codebook, and indexing y in the extended codebook C. The extension technique allows to obtain higher bit rate codebooks from the base codebooks compared to quantization method and system from the prior art.
摘要翻译：本发明涉及一种用于例如在数字传输和存储系统中使用的源信号的表示帧的源向量x的多速率格子矢量量化的方法和系统。多速率格子量化编码方法包括以下步骤：将x与无界格子λ中的格点y相关联; 验证y是否包括在从格子λ衍生的基本码本C中; 如果是这样的话，则在C中索引y，以便如果不是使用例如基于Voronoi的扩展方法扩展基本码本来产生量化索引，则产生扩展码本; 将来自扩展码本的码向量c与扩展码本C中的码向量c相关联。扩展技术允许从现有技术的量化方法和系统中获得来自基本码本的较高比特率码本。

17. 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。

18. 发明申请

US20050065785A1 Indexing pulse positions and signs in algebraic codebooks for coding of wideband signals 有权
标题翻译：用于编码宽带信号的代数码本中的脉冲位置和符号索引
公开(公告)号：US20050065785A1
公开(公告)日：2005-03-24
申请号：US10415456
申请日：2001-11-22
申请人： Bruno Bessette
发明人： Bruno Bessette
IPC分类号： G10L19/12 , H04W4/18 , G10L19/14
CPC分类号： G10L19/10 , G10L2019/0008
摘要： The indexing method comprises forming a set of tracks of pulse positions, restraining the positions of the non-zero-amplitude pulses of the combinations of the codebook in accordance with the set of tracks of pulse positions, and indexing in the codebook each non-zero-amplitude pulse of the combinations at least in relation to the position of the in the corresponding track, the amplitude of the pulse, and the number of pulse positions in said corresponding track. For indexing the position(s) of one and two non-zero amplitude pulse(s) in one track, procedures code_1 pulse and code_2 pulse are respectively used. When the positions of a number X of non-zero-amplitude pulses are located in one track, X≧3, subindices of these X pulses are calculated using the procedures code_1 pulse and code_2 pulse, and a global index is calculated by combining these subindices.
摘要翻译：索引方法包括形成一组脉冲位置的轨迹，根据脉冲位置的轨迹集合抑制码本的组合的非零幅度脉冲的位置，以及码本中的每个非零所述组合的至少相对于相应轨道的位置，所述脉冲的幅度以及所述对应轨道中的脉冲位置的数量的所述组合的振幅脉冲。为了索引一个轨道中一个和两个非零幅度脉冲的位置，分别使用程序代码1和脉冲2。当非零幅度脉冲数X的位置位于一个轨道中时，X> = 3，使用程序code_1 pulse和code_2脉冲来计算这些X脉冲的子点，并且通过组合这些值来计算全局索引子指标。

19. 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

20. 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。

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