公开(公告)号：US20070276657A1

公开(公告)日：2007-11-29

申请号：US11741014

申请日：2007-04-27

申请人： Philippe Gournay ,  Claude LaFlamme ,  Redwan Salami

发明人： Philippe Gournay ,  Claude LaFlamme ,  Redwan Salami

IPC分类号： G10L19/02

CPC分类号： G10L21/04

摘要： A method for the time scaling of a sampled audio signal is presented. The method includes a first step of performing a pitch and voicing analysis of each frame of the signal in order to determine if a given frame is voiced or unvoiced and to evaluate a pitch profile for voiced frames. The results of this analysis are used to determine the length and position of analysis windows along each frame. Once an analysis window is determined, it is overlap-added to previously synthesized windows of the output signal.

摘要翻译： 提出了一种用于采样音频信号的时间缩放的方法。 该方法包括对信号的每个帧执行音调和语音分析以便确定给定帧是有声还是无声并且评估浊音帧的音调简档的第一步骤。 该分析的结果用于确定每个框架分析窗口的长度和位置。 一旦确定了分析窗口，就将其与先前合成的输出信号窗口重叠。

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。

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。

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。

公开(公告)号：US08255207B2

公开(公告)日：2012-08-28

申请号：US12095224

申请日：2006-12-27

申请人： Tommy Vaillancourt ,  Milan Jelinek ,  Philippe Gournay ,  Redwan Salami

发明人： Tommy Vaillancourt ,  Milan Jelinek ,  Philippe Gournay ,  Redwan Salami

IPC分类号： G10L15/00

CPC分类号： G10L19/005

摘要： A method and device for concealing frame erasures caused by frames of an encoded sound signal erased during transmission from an encoder to a decoder and for recovery of the decoder after frame erasures comprise, in the encoder, determining concealment/recovery parameters including at least phase information related to frames of the encoded sound signal. The concealment/recovery parameters determined in the encoder are transmitted to the decoder and, in the decoder, frame erasure concealment is conducted in response to the received concealment/recovery parameters. The frame erasure concealment comprises resynchronizing, in response to the received phase information, the erasure-concealed frames with corresponding frames of the sound signal encoded at the encoder. When no concealment/recovery parameters are transmitted to the decoder, a phase information of each frame of the encoded sound signal that has been erased during transmission from the encoder to the decoder is estimated in the decoder. Also, frame erasure concealment is conducted in the decoder in response to the estimated phase information, wherein the frame erasure concealment comprises resynchronizing, in response to the estimated phase information, each erasure-concealed frame with a corresponding frame of the sound signal encoded at the encoder.

摘要翻译： 一种用于隐藏在从编码器到解码器的传输期间被擦除的编码声音信号的帧引起的帧擦除和在帧擦除之后恢复解码器的方法和装置，在编码器中包括确定包括至少相位信息的隐藏/恢复参数 与编码的声音信号的帧相关。 在编码器中确定的隐藏/恢复参数被发送到解码器，并且在解码器中，响应于接收到的隐藏/恢复参数进行帧擦除隐藏。 帧擦除隐藏包括响应于接收到的相位信息重新同步擦除隐藏的帧与在编码器处编码的声音信号的相应帧。 当没有隐藏/恢复参数被发送到解码器时，在解码器中估计在从编码器到解码器的传输期间被擦除的编码声音信号的每帧的相位信息。 此外，响应于估计的相位信息在解码器中进行帧擦除隐藏，其中帧擦除隐藏包括响应于估计的相位信息重新同步每个被擦除隐藏的帧与在该编码的声音信号的相应帧 编码器。

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。

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。

公开(公告)号：US08712764B2

公开(公告)日：2014-04-29

申请号：US12501197

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： G10L19/04

CPC分类号： G10L19/06 ,  G10L19/18 ,  H03M7/3082

摘要： A device and a method for quantizing, in a super-frame including a sequence of frames, LPC filters calculated during the frames of the sequence. The LPC filter quantizing device and method comprises: an absolute quantizer for first quantizing one of the LPC filters using absolute quantization; and at least one quantizer of the other LPC filters using a quantization mode selected from the group consisting of absolute quantization and differential quantization relative to at least one previously quantized filter amongst the LPC filters. For inverse quantizing, at least the first quantized LPC filter is received and an inverse quantizer inverse quantizes the first quantized LPC filter using absolute inverse quantization. If any quantized LPC filter other than the first quantized LPC filter is received, an inverse quantizer inverse quantizes this quantized LPC filter using one of absolute inverse quantization and differential inverse quantization relative to at least one previously received quantized LPC filter.

摘要翻译： 一种用于在包括帧序列的超帧中量化在序列的帧期间计算的LPC滤波器的装置和方法。 LPC滤波器量化装置和方法包括：绝对量化器，用于使用绝对量化首先量化LPC滤波器之一; 以及使用从相对于LPC滤波器中的至少一个先前量化的滤波器的绝对量化和差分量化组成的组中选择的量化模式的其它LPC滤波器的至少一个量化器。 对于逆量化，至少接收第一量化LPC滤波器，并且逆量化器使用绝对反量化对第一量化LPC滤波器进行逆量化。 如果接收到除了第一量化LPC滤波器之外的任何量化LPC滤波器，则逆量化器相对于至少一个先前接收的量化LPC滤波器，使用绝对反量子化和差分逆量化之一对该量化的LPC滤波器进行逆量化。

公开(公告)号：US08447620B2

公开(公告)日：2013-05-21

申请号：US13081223

申请日：2011-04-06

申请人： Max Neuendorf ,  Stefan Bayer ,  Jérémie Lecomte ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Ralf Geiger ,  Markus Multrus ,  Bernhard Grill ,  Philippe Gournay ,  Redwan Salami

发明人： Max Neuendorf ,  Stefan Bayer ,  Jérémie Lecomte ,  Guillaume Fuchs ,  Julien Robilliard ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Ralf Geiger ,  Markus Multrus ,  Bernhard Grill ,  Philippe Gournay ,  Redwan Salami

IPC分类号： G10L19/008

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0212 ,  G10L19/173 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder for encoding an audio signal has a first coding branch, the first coding branch comprising a first converter for converting a signal from a time domain into a frequency domain. Furthermore, the audio encoder has a second coding branch comprising a second time/frequency converter. Additionally, a signal analyzer for analyzing the audio signal is provided. The signal analyzer, on the hand, determines whether an audio portion is effective in the encoder output signal as a first encoded signal from the first encoding branch or as a second encoded signal from a second encoding branch. On the other hand, the signal analyzer determines a time/frequency resolution to be applied by the converters when generating the encoded signals. An output interface includes, in addition to the first encoded signal and the second encoded signal, a resolution information identifying the resolution used by the first time/frequency converter and used by the second time/frequency converter.

公开(公告)号：US08484038B2

公开(公告)日：2013-07-09

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： G10L21/00 ,  G10L19/00

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。