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1. 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。

2. 发明申请

US20120185255A1 IMPROVED CODING/DECODING OF DIGITAL AUDIO SIGNALS 有权
标题翻译：改进数字音频信号的编码/解码
公开(公告)号：US20120185255A1
公开(公告)日：2012-07-19
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： G10L21/00
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。

3. 发明授权

US09218817B2 Low-delay sound-encoding alternating between predictive encoding and transform encoding 有权
标题翻译：在预测编码和变换编码之间交替的低延迟声音编码
公开(公告)号：US09218817B2
公开(公告)日：2015-12-22
申请号：US13997446
申请日：2011-12-20
申请人： Stéphane Ragot , Balazs Kovesi , Pierre Berthet
发明人： Stéphane Ragot , Balazs Kovesi , Pierre Berthet
IPC分类号： G10L19/04 , G10L19/12 , G10L19/022 , G10L19/18 , G10L19/02
CPC分类号： G10L19/12 , G10L19/0212 , G10L19/022 , G10L19/04 , G10L19/18
摘要： An encoder and a method for encoding a digital signal are provided. The method includes encoding a preceding frame of samples of the digital signal according to a predictive encoding process, and encoding a current frame of samples of the digital signal according to a transform encoding process. The method is implemented such that a first portion of the current frame is also encoded by predictive encoding that is limited relative to the predictive encoding of the preceding frame by reusing at least one parameter of the predictive encoding of the preceding frame and only encoding the parameters of said first portion of the current frame that are not reused. A decoder and a decoding method are also provided, which correspond to the described encoding method.
摘要翻译：提供了一种用于编码数字信号的编码器和方法。该方法包括根据预测编码处理对数字信号的前一帧采样进行编码，并根据变换编码处理对当前数字信号采样帧进行编码。该方法被实现为使得当前帧的第一部分也通过预测编码进行编码，所述预测编码相对于前一帧的预测编码被限制，通过重用前一帧的预测编码的至少一个参数并且仅对参数进行编码的当前帧的所述第一部分不被重复使用。还提供了对应于所述编码方法的解码器和解码方法。

4. 发明授权

US08630864B2 Method for switching rate and bandwidth scalable audio decoding rate 失效
标题翻译：切换速率和带宽可扩展音频解码速率的方法
公开(公告)号：US08630864B2
公开(公告)日：2014-01-14
申请号：US11989313
申请日：2006-07-10
申请人： Stéphane Ragot , David Virette , Balazs Kovesi
发明人： Stéphane Ragot , David Virette , Balazs Kovesi
IPC分类号： G10L15/00
CPC分类号： G10L19/24 , G10L19/26
摘要： A method of bitrate switching on decoding an audio signal coded by a audio coding system, said decoding comprising a post-processing step depending on the bitrate. On switching from an initial bitrate to a final bitrate, said method includes a transition step of continuous change from a signal at the initial bitrate to a signal at the final bitrate, one or both of said signals being post-processed. Application to transmission of VoIP speech and/or audio signals in data packet networks.
摘要翻译：一种对由音频编码系统编码的音频信号进行解码的比特率切换的方法，所述解码包括取决于比特率的后处理步骤。在从初始比特率切换到最终比特率时，所述方法包括从初始比特率的信号到最终比特率的信号的连续变化的转变步骤，所述信号中的一个或两个被后处理。应用于数据分组网络中VoIP语音和/或音频信号的传输。

5. 发明申请

US20090306992A1 Method for switching rate and bandwidth scalable audio decoding rate 失效
标题翻译：切换速率和带宽可扩展音频解码速率的方法
公开(公告)号：US20090306992A1
公开(公告)日：2009-12-10
申请号：US11989313
申请日：2006-07-10
申请人： Stéphane Ragot , David Virette , Balazs Kovesi
发明人： Stéphane Ragot , David Virette , Balazs Kovesi
IPC分类号： G10L19/00
CPC分类号： G10L19/24 , G10L19/26
摘要： A method of bitrate switching on decoding an audio signal coded by a audio coding system, said decoding comprising a post-processing step depending on the bitrate. On switching from an initial bitrate to a final bitrate, said method includes a transition step of continuous change from a signal at the initial bitrate to a signal at the final bitrate, one or both of said signals being post-processed. Application to transmission of VoIP speech and/or audio signals in data packet networks.
摘要翻译：一种对由音频编码系统编码的音频信号进行解码的比特率切换的方法，所述解码包括取决于比特率的后处理步骤。在从初始比特率切换到最终比特率时，所述方法包括从初始比特率的信号到最终比特率的信号的连续变化的转变步骤，所述信号中的一个或两个被后处理。应用于数据分组网络中VoIP语音和/或音频信号的传输。

6. 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）。

7. 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。

8. 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。

9. 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。

10. 发明授权

US08607127B2 Transmission error dissimulation in a digital signal with complexity distribution 有权
标题翻译：具有复杂度分布的数字信号中的传输误差异常
公开(公告)号：US08607127B2
公开(公告)日：2013-12-10
申请号：US12675200
申请日：2008-09-19
申请人： Balazs Kovesi , Stéphane Ragot
发明人： Balazs Kovesi , Stéphane Ragot
IPC分类号： G06F11/00
CPC分类号： G10L19/16 , G10L19/005 , G10L19/0204
摘要： The present invention relates to a method of transmission error concealment in a digital signal split up into a plurality of successive frames associated with different time intervals in which, on reception, the signal might comprise erased frames and valid frames and in order to replace at least the first erased frame (N) after a valid frame, at least two steps are performed, a first step (E1) of preparation not producing any missing sample and comprising at least one analysis of a valid decoded signal and a second step (E2) of concealment producing the missing samples of the signal corresponding to said erased frame. The first step and the second step are executed in different time intervals.The invention relates also to a device of concealment implementing the method according to the invention as well as a decoder comprising such a device. The invention allows the distribution of the error concealment complexity on different time intervals.
摘要翻译：本发明涉及一种数字信号中的传输错误隐藏方法，该数字信号分成与不同时间间隔相关联的多个连续帧，其中，在接收时，该信号可能包括被擦除的帧和有效帧，并且至少替换在有效帧之后执行至少两个步骤的第一擦除帧（N），准备不产生任何丢失样本并且包括有效解码信号和第二步骤（E2）的至少一个分析的第一步骤（E1）的隐藏产生对应于所述被擦除的帧的信号的丢失样本。第一步和第二步以不同的时间间隔执行。本发明还涉及实现根据本发明的方法的隐藏装置以及包括这种装置的解码器。本发明允许在不同的时间间隔上分布错误隐藏复杂性。

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