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1. 发明申请

US20110224995A1 CODING WITH NOISE SHAPING IN A HIERARCHICAL CODER 有权
标题翻译：在分层编码器中编码噪声
公开(公告)号：US20110224995A1
公开(公告)日：2011-09-15
申请号：US13129483
申请日：2009-11-17
申请人： Balazs Kovesi , Stéphane Ragot , Alain Le Guyader
发明人： Balazs Kovesi , Stéphane Ragot , Alain Le Guyader
IPC分类号： G06F17/00
CPC分类号： G10L19/24 , G10L19/04 , G10L19/265
摘要： A method is provided for hierarchical coding of a digital audio signal comprising, for a current frame of the input signal: a core coding, delivering a scalar quantization index for each sample of the current frame and at least one enhancement coding delivering indices of scalar quantization for each coded sample of an enhancement signal. The enhancement coding comprises a step of obtaining a filter for shaping the coding noise used to determine a target signal and in that the indices of scalar quantization of said enhancement signal are determined by minimizing the error between a set of possible values of scalar quantization and said target signal. The coding method can also comprise a shaping of the coding noise for the core bitrate coding. A coder implementing the coding method is also provided.
摘要翻译：提供了一种用于数字音频信号的分层编码的方法，包括对于输入信号的当前帧：核心编码，为当前帧的每个采样递送标量量化索引和至少一个标量量化的增强编码递送索引对于增强信号的每个编码样本。增强编码包括获得用于整形用于确定目标信号的编码噪声的滤波器的步骤，并且通过最小化标量量化的一组可能值与所述第二编码噪声的误差来确定所述增强信号的标量量化的索引，目标信号。编码方法还可以包括核心比特率编码的编码噪声的整形。还提供了一种实现编码方法的编码器。

2. 发明申请

US20130204630A1 Controlling a Noise-Shaping Feedback Loop in a Digital Audio Signal Encoder 有权
标题翻译：控制数字音频信号编码器中的噪声整形反馈回路
公开(公告)号：US20130204630A1
公开(公告)日：2013-08-08
申请号：US13806625
申请日：2011-06-17
申请人： Stéphane Ragot , Balazs Kovesi , Alain Le Guyader
发明人： Stéphane Ragot , Balazs Kovesi , Alain Le Guyader
IPC分类号： G10L19/032
CPC分类号： G10L19/032 , G10L19/04 , H04B1/62
摘要： A method and apparatus are provided for controlling the shaping of encoding noise during the ADPCM encoding of a digital audio input signal. The noise-shaping is carried out through the use of feedback that comprises filtering noise. The method includes the following steps: obtaining a parameter for indicating a high spectral dynamic range of the signal, the parameter indicating a risk of instability of the feedback; detecting a risk of instability by comparing the indication parameter to at least one predetermined threshold; limiting the feedback in the event that a risk of instability is detected; and gradually reactivating the feedback over a predetermined number of frames subsequent to the current frame for which the feedback is limited. Also provided is an encoder with feedback, including a control module implementing the control method as described.
摘要翻译：提供了一种方法和装置，用于在数字音频输入信号的ADPCM编码期间控制编码噪声的整形。通过使用包括滤波噪声的反馈来进行噪声整形。该方法包括以下步骤：获得用于指示信号的高光谱动态范围的参数，该参数指示反馈不稳定的风险; 通过将所述指示参数与至少一个预定阈值进行比较来检测不稳定性的风险; 在发现不稳定风险的情况下限制反馈; 并且在反馈被限制的当前帧之后的预定数量的帧上逐渐重新激活反馈。还提供了具有反馈的编码器，包括实现如上所述的控制方法的控制模块。

3. 发明申请

US20100145712A1 CODING OF DIGITAL AUDIO SIGNALS 有权
标题翻译：数字音频信号编码
公开(公告)号：US20100145712A1
公开(公告)日：2010-06-10
申请号：US12602809
申请日：2008-06-13
申请人： Balazs Kovesi , Alain Le Guyader , Stéphane Ragot
发明人： Balazs Kovesi , Alain Le Guyader , Stéphane Ragot
IPC分类号： G10L19/00
CPC分类号： H04B14/04 , G10L19/032 , G10L19/24 , G10L19/265
摘要： The invention concerns an encoder for an input audio signal (S(z)) comprising a combination module combining the input audio signal with an intermediate counter-reaction signal forming a modified input signal and a quantification module scalable for the rate (91) of said modified input signal, delivering a binary raster of quantification indexes of a predetermined rate. This encoder is such that it comprises: a reverse quantification module (93) of a part of the quantification indexes of the binary raster corresponding to the indexes of a rate lower than the predetermined rate, for predetermining a reconstructed signal (SMic, (z)), a module for determining (94) a quantification noise (QMic(z)) derived from at least quantification modules and reverse quantification modules in series, a determination module (111) for a filtering function of the quantification noise from said reconstructed signal and a filtering module fit for applying (33) said filtering function to said quantification noise in order to obtain said intermediary counter-reaction signal. The invention also relates to an encoding method applied by the described encoder and a corresponding decoding method applied by a decoder.
摘要翻译：本发明涉及一种用于输入音频信号（S（z））的编码器，包括组合模块的组合模块，该组合模块将输入音频信号与形成修改的输入信号的中间反作用信号和可针对所述修改输入信号，提供预定速率的量化指标的二进制光栅。该编码器包括：用于预先确定重构信号（SMic，（z））的二进制光栅的量化指标的一部分的反向量化模块（93），其对应于低于预定速率的速率的索引，），用于从至少量化模块和反向量化模块串行地确定（94）量化噪声（QMic（z））的模块，用于来自所述重构信号的量化噪声的滤波函数的确定模块（111）和滤波模块适于将所述滤波函数应用于所述量化噪声（33），以获得所述中间反作用信号。本发明还涉及由所述编码器应用的编码方法和由解码器应用的对应的解码方法。

4. 发明授权

US08719012B2 Methods and apparatus for coding digital audio signals using a filtered quantizing noise 有权
标题翻译：使用滤波的量化噪声对数字音频信号进行编码的方法和装置
公开(公告)号：US08719012B2
公开(公告)日：2014-05-06
申请号：US12602809
申请日：2008-06-13
申请人： Balazs Kovesi , Alain Le Guyader , Stéphane Ragot
发明人： Balazs Kovesi , Alain Le Guyader , Stéphane Ragot
IPC分类号： G10L21/00
CPC分类号： H04B14/04 , G10L19/032 , G10L19/24 , G10L19/265
摘要： The invention concerns an encoder for an input audio signal (S(z)) comprising a combination module combining the input audio signal with an intermediate counter-reaction signal forming a modified input signal and a quantification module scalable for the rate (91) of said modified input signal, delivering a binary raster of quantification indexes of a predetermined rate. This encoder is such that it comprises: a reverse quantification module (93) of a part of the quantification indexes of the binary raster corresponding to the indexes of a rate lower than the predetermined rate, for predetermining a reconstructed signal (SMic(z)), a module for determining (94) a quantification noise (QMic(z)) derived from at least quantification modules and reverse quantification modules in series, a determination module (111) for a filtering function of the quantification noise from said reconstructed signal and a filtering module fit for applying (33) said filtering function to said quantification noise in order to obtain said intermediary counter-reaction signal. The invention also relates to an encoding method applied by the described encoder and a corresponding decoding method applied by a decoder.
摘要翻译：本发明涉及一种用于输入音频信号（S（z））的编码器，包括组合模块的组合模块，该组合模块将输入音频信号与形成修改的输入信号的中间反作用信号和可针对所述修改输入信号，提供预定速率的量化指标的二进制光栅。该编码器包括：用于预先确定重构信号（SMic（z））的与低于预定速率的速率的指标相对应的二进制栅格的量化指标的一部分的反向量化模块（93）一个用于确定（94）从至少量化模块和反向量化模块中串行得到的量化噪声（QMic（z））的模块，用于来自所述重构信号的量化噪声的滤波函数的确定模块（111）和滤波模块适于将所述滤波函数应用于所述量化噪声（33），以获得所述中间反作用信号。本发明还涉及由所述编码器应用的编码方法和由解码器应用的对应的解码方法。

5. 发明授权

US09489961B2 Controlling a noise-shaping feedback loop in a digital audio signal encoder avoiding instability risk of the feedback 有权
标题翻译：控制数字音频信号编码器中的噪声整形反馈回路，避免反馈的不稳定风险
公开(公告)号：US09489961B2
公开(公告)日：2016-11-08
申请号：US13806625
申请日：2011-06-17
申请人： Stéphane Ragot , Balazs Kovesi , Alain Le Guyader
发明人： Stéphane Ragot , Balazs Kovesi , Alain Le Guyader
IPC分类号： G10L19/00 , G10L21/00 , G10L19/032 , G10L19/04 , H04B1/62
CPC分类号： G10L19/032 , G10L19/04 , H04B1/62
摘要： A method and apparatus are provided for controlling the shaping of encoding noise during the ADPCM encoding of a digital audio input signal. The noise-shaping is carried out through the use of feedback that comprises filtering noise. The method includes the following steps: obtaining a parameter for indicating a high spectral dynamic range of the signal, the parameter indicating a risk of instability of the feedback; detecting a risk of instability by comparing the indication parameter to at least one predetermined threshold; limiting the feedback in the event that a risk of instability is detected; and gradually reactivating the feedback over a predetermined number of frames subsequent to the current frame for which the feedback is limited. Also provided is an encoder with feedback, including a control module implementing the control method as described.
摘要翻译：提供了一种方法和装置，用于在数字音频输入信号的ADPCM编码期间控制编码噪声的整形。通过使用包括滤波噪声的反馈来进行噪声整形。该方法包括以下步骤：获得用于指示信号的高光谱动态范围的参数，该参数指示反馈不稳定的风险; 通过将所述指示参数与至少一个预定阈值进行比较来检测不稳定性的风险; 在发现不稳定风险的情况下限制反馈; 并且在反馈被限制的当前帧之后的预定数量的帧上逐渐重新激活反馈。还提供了具有反馈的编码器，包括实现如上所述的控制方法的控制模块。

6. 发明授权

US08965773B2 Coding with noise shaping in a hierarchical coder 有权
标题翻译：在分层编码器中对噪声整形进行编码
公开(公告)号：US08965773B2
公开(公告)日：2015-02-24
申请号：US13129483
申请日：2009-11-17
申请人： Balazs Kovesi , Stéphane Ragot , Alain Le Guyader
发明人： Balazs Kovesi , Stéphane Ragot , Alain Le Guyader
IPC分类号： G10L19/00 , G10L19/24 , G10L19/26 , G10L19/04
CPC分类号： G10L19/24 , G10L19/04 , G10L19/265
摘要： A method is provided for hierarchical coding of a digital audio signal comprising, for a current frame of the input signal: a core coding, delivering a scalar quantization index for each sample of the current frame and at least one enhancement coding delivering indices of scalar quantization for each coded sample of an enhancement signal. The enhancement coding comprises a step of obtaining a filter for shaping the coding noise used to determine a target signal and in that the indices of scalar quantization of said enhancement signal are determined by minimizing the error between a set of possible values of scalar quantization and said target signal. The coding method can also comprise a shaping of the coding noise for the core bitrate coding. A coder implementing the coding method is also provided.
摘要翻译：提供了一种用于数字音频信号的分层编码的方法，包括对于输入信号的当前帧：核心编码，为当前帧的每个采样递送标量量化索引和至少一个标量量化的增强编码递送索引对于增强信号的每个编码样本。增强编码包括获得用于整形用于确定目标信号的编码噪声的滤波器的步骤，并且通过最小化标量量化的一组可能值与所述第二编码噪声的误差来确定所述增强信号的标量量化的索引，目标信号。编码方法还可以包括核心比特率编码的编码噪声的整形。还提供了一种实现编码方法的编码器。

7. 发明申请

US20130268268A1 ENCODING OF AN IMPROVEMENT STAGE IN A HIERARCHICAL ENCODER 审中-公开
标题翻译：编码在分层编码器中的改进阶段
公开(公告)号：US20130268268A1
公开(公告)日：2013-10-10
申请号：US13995014
申请日：2011-12-13
申请人： Balazs Kovesi , Stéphane Ragot , Alain Le Guyader
发明人： Balazs Kovesi , Stéphane Ragot , Alain Le Guyader
IPC分类号： G10L19/00
CPC分类号： G10L19/00 , G10L19/0208 , G10L19/032 , G10L19/24
摘要： A method and coding device are provided for coding a digital audio input signal in a hierarchical coder, which includes a core coding stage with B bits and at least one current improvement coding stage k, delivering quantization indices which are concatenated to form the indices of a preceding embedded coder. The method includes: obtaining possible quantization values for the current improvement stage k by determining absolute reconstruction levels of just the current stage k on the basis of the indices of the preceding embedded coder; and quantizing the input signal of the hierarchical coder having undergone or not a perceptual weighting processing, on the basis of the possible quantization values so as to form a scalar quantization index for the stage k and a quantized signal corresponding to one of the possible quantization values.
摘要翻译：提供了一种方法和编码装置，用于对分层编码器中的数字音频输入信号进行编码，该分层编码器包括具有B位的核心编码级和至少一个当前改进编码级k，传送量化索引，其被级联以形成一个前置嵌入式编码器。该方法包括：通过基于前述嵌入式编码器的索引确定刚刚当前阶段k的绝对重建级别来获得当前改进级k的可能量化值; 并且基于可能的量化值量化已经经历或不进行感知加权处理的分级编码器的输入信号，以便形成用于阶段k的标量量化索引和对应于可能的量化值之一的量化信号。

8. 发明授权

US08812327B2 Coding/decoding of digital audio signals 有权
标题翻译：数字音频信号的编码/解码
公开(公告)号：US08812327B2
公开(公告)日：2014-08-19
申请号：US13382786
申请日：2010-06-25
申请人： David Virette , Stéphane Ragot , Balazs Kovesi , Pierre Berthet
发明人： David Virette , Stéphane Ragot , Balazs Kovesi , Pierre Berthet
IPC分类号： G10L19/00 , G10L19/02 , G10L19/12 , G10L21/00 , G10L21/02 , G10L21/04 , G10L25/00 , G06F15/00 , H04N19/00
CPC分类号： G10L19/002 , G10L19/0212 , G10L19/038 , G10L19/24
摘要： A method of hierarchical coding of a digital audio frequency input signal into several frequency sub-bands, including a core coding of the input signal according to a first throughput and at least one enhancement coding of higher throughput, of a residual signal. The core coding uses a binary allocation according to an energy criterion. The method includes for the enhancement coding: calculating a frequency-based masking threshold for at least part of the frequency bands processed by the enhancement coding; determining a perceptual importance per frequency sub-band as a function of the masking threshold and as a function of the number of bits allocated for the core coding; binary allocation of bits in the frequency sub-bands processed by the enhancement coding, as a function of the perceptual importance determined; and coding the residual signal according to the bit allocation. Also provided are a decoding method, a coder and a decoder.
摘要翻译：一种将数字音频输入信号分层编码成若干频率子带的方法，包括根据第一吞吐量的输入信号的核心编码和较高吞吐量的残余信号的至少一个增强编码。核心编码根据能量标准使用二进制分配。该方法包括用于增强编码：计算由增强编码处理的至少部分频带的基于频率的掩蔽阈值; 确定每个频率子带的感知重要性作为掩蔽阈值的函数，并且作为分配给核心编码的比特数的函数; 由增强编码处理的频率子带中的位的二进制分配作为确定的感知重要性的函数; 并根据比特分配对残差信号进行编码。还提供了解码方法，编码器和解码器。

9. 发明授权

US08417519B2 Synthesis of lost blocks of a digital audio signal, with pitch period correction 有权
标题翻译：合成数字音频信号的丢失块，具有音调周期校正
公开(公告)号：US08417519B2
公开(公告)日：2013-04-09
申请号：US12446264
申请日：2007-10-17
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： G10L21/02 , G10L19/14
CPC分类号： G10L19/005 , G10L19/0204 , G10L19/025
摘要： The present invention relates to signal modification before pitch period repetition for the synthesis of blocks lost on decoding digital audio signals. The effects of repetition of transitories, such as the plosives of a speech signal, are avoided by comparing the samples of a pitch period with those of the previous pitch period. The signal is modified preferentially by taking the minimum between a current sample (e(3)) of the last pitch period (Tj) and at least one sample (e(2−T0) of approximately the same position in the previous pitch period (Tj−1).
摘要翻译：本发明涉及音频周期重复之前的信号修改，用于合成在解码数字音频信号时丢失的块。通过将音调周期的样本与前一音调周期的样本进行比较，可以避免诸如语音信号的爆音的重复的影响。通过在最后的音调周期（Tj）的当前采样（e（3））和在前一音调周期（Tj）中的至少一个样本（e（2-T0））之间的大致相同的位置 Tj-1）。

10. 发明申请

US20100241427A1 LIMITATION OF DISTORTION INTRODUCED BY A POST-PROCESSING STEP DURING DIGITAL SIGNAL DECODING 有权
标题翻译：数字信号解码过程中后处理引入的失真限制
公开(公告)号：US20100241427A1
公开(公告)日：2010-09-23
申请号：US12667908
申请日：2008-07-04
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： G10L21/02
CPC分类号： G10L19/26 , G10L21/02
摘要： The invention relates to the processing of a digital signal originating from a decoder and a noise reduction post-processing step, including, in particular, limitation of distortion introduced by the post-processing step in order to deliver a corrected output signal (SOUT), assigning said corrected output signal (SOUT) with: a current amplitude having an intermediary value between a current amplitude value of the post-processed signal (SPOST) and a corresponding current amplitude value of the decoded signal (S′MIC), or the current amplitude of the post-processed signal (SPOST), according to the respective values of the current amplitude of the post-processed signal (SPOST) and by the corresponding current amplitude of the decoded signal (S′MIC).
摘要翻译：本发明涉及从解码器产生的数字信号的处理和降噪后处理步骤，特别地，包括通过后处理步骤引入的失真的限制，以便递送校正的输出信号（SOUT），通过以下方式分配所述校正输出信号（SOUT）：具有后处理信号（SPOST）的当前振幅值与解码信号（S'MIC）的相应电流振幅值之间的中间值的电流幅度或电流根据后处理信号（SPOST）的当前幅度的相应值和解码信号（S'MIC）的对应电流幅度，后处理信号（SPOST）的振幅。

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