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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。

3. 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。

4. 发明申请

US20090326931A1 HIERARCHICAL ENCODING/DECODING DEVICE 有权
标题翻译：分层编码/解码设备
公开(公告)号：US20090326931A1
公开(公告)日：2009-12-31
申请号：US11988758
申请日：2006-07-07
申请人： Stéphane Ragot , David Virette
发明人： Stéphane Ragot , David Virette
IPC分类号： G10L21/00 , G10L19/00
CPC分类号： G10L19/24
摘要： A system for coding a hierarchical audio signal, comprising, at least, a core layer using parametric coding by analysis by synthesis in a first frequency band, a band extension layer for widening said first frequency band into a second frequency band, or wideband. The system also comprises a wideband audio coding quality enhancement layer based on transform coding using a spectral parameter obtained from said band extension layer. Application to transmitting speech and/or audio signals over packet networks.
摘要翻译：一种用于对分层音频信号进行编码的系统，至少包括使用第一频带中的合成分析的参数编码的核心层，用于将所述第一频带扩展成第二频带的带扩展层或宽带。该系统还包括基于使用从所述频带扩展层获得的频谱参数的变换编码的宽带音频编码质量增强层。应用于通过分组网络传输语音和/或音频信号。

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

US08374853B2 Hierarchical encoding/decoding device 有权
标题翻译：分层编码/解码装置
公开(公告)号：US08374853B2
公开(公告)日：2013-02-12
申请号：US11988758
申请日：2006-07-07
申请人： Stéphane Ragot , David Virette
发明人： Stéphane Ragot , David Virette
IPC分类号： G10L19/00 , G10L19/12 , G10L19/14
CPC分类号： G10L19/24
摘要： A system for coding a hierarchical audio signal, comprising, at least, a core layer using parametric coding by analysis by synthesis in a first frequency band, a band extension layer for widening said first frequency band into a second frequency band, or wideband. The system also comprises a wideband audio coding quality enhancement layer based on transform coding using a spectral parameter obtained from said band extension layer. Application to transmitting speech and/or audio signals over packet networks.
摘要翻译：一种用于对分层音频信号进行编码的系统，至少包括使用第一频带中的合成分析的参数编码的核心层，用于将所述第一频带扩展成第二频带的带扩展层或宽带。该系统还包括基于使用从所述频带扩展层获得的频谱参数的变换编码的宽带音频编码质量增强层。应用于通过分组网络传输语音和/或音频信号。

7. 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）。

8. 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。

9. 发明授权

US07994945B2 Encoding/decoding of digital signals, especially in vector quantization with permutation codes 有权
公开(公告)号：US07994945B2
公开(公告)日：2011-08-09
申请号：US12366093
申请日：2009-02-05
申请人： Stéphane Ragot , Claude Lamblin
发明人： Stéphane Ragot , Claude Lamblin
IPC分类号： H03M7/00
CPC分类号： H03M7/00 , H03M7/3082
摘要： The invention relates to the encoding/decoding of digital signals, especially using permutation codes involving a calculation of combinatorial expressions. According to the invention, the combinatorial expressions are represented by prime factor power decompositions, and determined by a preliminary reading of pre-recorded representations of decompositions of selected integers.

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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