公开(公告)号：US20130096930A1

公开(公告)日：2013-04-18

申请号：US13707192

申请日：2012-12-06

申请人： Fraunhofer-Gesellschaft zur Foerderung der angew ,  Voiceage Corporation

发明人： Max NEUENDORF ,  Stefan BAYER ,  Jeremie 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.

摘要翻译： 用于编码音频信号的音频编码器具有第一编码分支，所述第一编码分支包括用于将来自时域的信号转换成频域的第一转换器。 此外，音频编码器具有包括第二时间/频率转换器的第二编码分支。 另外，提供了用于分析音频信号的信号分析器。 手持信号分析仪确定音频部分是否在编码器输出信号中作为来自第一编码分支的第一编码信号或来自第二编码分支的第二编码信号有效。 另一方面，当生成编码信号时，信号分析仪确定由转换器施加的时间/频率分辨率。 除了第一编码信号和第二编码信号之外，输出接口包括识别由第一时间/频率转换器使用并由第二时间/频率转换器使用的分辨率的分辨率信息。

公开(公告)号：US08401845B2

公开(公告)日：2013-03-19

申请号：US12918586

申请日：2009-03-05

申请人： Tommy Vaillancourt ,  Milan Jelinek ,  Vladimir Malenovsky ,  Redwan Salami

发明人： Tommy Vaillancourt ,  Milan Jelinek ,  Vladimir Malenovsky ,  Redwan Salami

IPC分类号： G10L21/02 ,  G10L19/14 ,  G10L19/00 ,  H04B15/00

CPC分类号： G10L19/26 ,  G10L25/18

摘要： A system and method for enhancing a tonal sound signal decoded by a decoder of a speech-specific codec in response to a received coded bit stream, in which a spectral analyser is responsive to the decoded tonal sound signal to produce spectral parameters representative of the decoded tonal sound signal. A quantization noise in low-energy spectral regions of the decoded tonal sound signal is reduced in response to the spectral parameters produced by the spectral analyser. The spectral analyser divides a spectrum resulting from spectral analysis into a set of critical frequency bands each comprising a number of frequency bins, and the reducer of quantization noise comprises a noise attenuator that scales the spectrum of the decoded tonal sound signal per critical frequency band, per frequency bin, or per both critical frequency band and frequency bin.

摘要翻译： 一种用于响应于接收的编码比特流来增强由语音专用编解码器的解码器解码的音调声音信号的系统和方法，其中频谱分析仪响应于解码的音调声音信号以产生表示解码的频谱参数 音调声信号。 响应于由光谱分析仪产生的光谱参数，解码的音调声音信号的低能谱区域中的量化噪声被减小。 光谱分析仪将从光谱分析得到的光谱分成一组包括多个频率仓的临界频带，并且量化噪声的减法器包括噪声衰减器，其对每个关键频带的解码音调声音信号的频谱进行缩放， 每个频率仓，或每个临界频带和频率仓。

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：US07979271B2

公开(公告)日：2011-07-12

申请号：US10589035

申请日：2005-02-18

申请人： Bruno Bessette

发明人： Bruno Bessette

IPC分类号： G10L19/04

CPC分类号： G10L19/0208 ,  G10L19/005 ,  G10L19/24 ,  G10L19/265 ,  G10L21/0232

摘要： Methods and devices are used for switching between sound signal coding modes and for producing from a decoded target signal, an overlap-add target signal in a current frame coded according to a first mode. On a coder side, switching is at the junction between a previous frame coded according to a first coding mode and a current frame coded according to a second coding mode, a sound signal is filtered through a weighting filter to produce a weighted signal in the current frame, and a windowed zero-input response of the weighting filter is removed from the weighted signal. On a decoder side, a current frame of the target signal is first windowed, a left portion of a resulting window is skipped, and then a windowed zero-input response of the weighting filter is added to the decoded target signal to reconstruct the overlap-add target signal.

摘要翻译： 方法和装置用于在声音信号编码模式之间切换，并且用于根据解码的目标信号产生根据第一模式编码的当前帧中的重叠相加目标信号。 在编码器侧，切换在根据第一编码模式编码的先前帧和根据第二编码模式编码的当前帧之间的结点处，声音信号通过加权滤波器被滤波以产生当前的加权信号 帧，并且加权滤波器的加窗零输入响应从加权信号中去除。 在解码器侧，首先对目标信号的当前帧进行窗口化，跳过所得到的窗口的左侧部分，然后将加权滤波器的加窗零输入响应加到解码的目标信号上， 添加目标信号。

公开(公告)号：US20110125505A1

公开(公告)日：2011-05-26

申请号：US12095224

申请日：2006-12-28

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

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

IPC分类号： G10L19/00

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并且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：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。