公开(公告)号：US20100023324A1

公开(公告)日：2010-01-28

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： G10L19/14

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：US20100023323A1

公开(公告)日：2010-01-28

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： G10L19/14

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标准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：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>

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：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：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：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。

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

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。

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。