公开(公告)号：US20150170668A1

公开(公告)日：2015-06-18

申请号：US14411790

申请日：2013-06-28

申请人： Orange

发明人： Balazs Kovesi ,  Stephane Ragot

IPC分类号： G10L21/0364 ,  G10L19/26

CPC分类号： G10L21/0364 ,  G10L19/025 ,  G10L19/26

摘要： A method is provided for processing pre-echo attenuation in a digital audio signal generated from a transform coding, wherein, at the decoding point, the method includes: detection of a position of attack in the decoded signal; determination of a pre-echo region preceding the position of attack detected in the decoded signal; calculation of attenuation factors per sub-block of the pre-echo region, according to at least the frame wherein the attack has been detected and the preceding frame; and pre-echo attenuation in the sub-blocks of the pre-echo region by the corresponding damping factors. The method also includes application of a filter for the spectral shaping of the pre-echo region on the current frame up to the detected position of the attack. A device and a decoder including the device are also proved for implementing the method.

摘要翻译： 提供一种处理从变换编码产生的数字音频信号中的前回波衰减的方法，其中在解码点，该方法包括：检测解码信号中的攻击位置; 确定在解码信号中检测到的攻击位置之前的预回波区域; 根据至少已经检测到攻击的帧和前一帧，计算预回波区域的每个子块的衰减因子; 并通过相应的阻尼因子在预回波区域的子块中进行前回波衰减。 该方法还包括应用滤波器，用于当前帧上的预回波区域的频谱整形，直到检测到的攻击位置。 包括该设备的设备和解码器也被证明用于实现该方法。

公开(公告)号：US11664034B2

公开(公告)日：2023-05-30

申请号：US17130567

申请日：2020-12-22

申请人： Orange

发明人： Bertrand Fatus ,  Stephane Ragot ,  Marc Emerit

IPC分类号： G10L19/00 ,  G10L21/00 ,  G10L19/008 ,  G10L25/18

CPC分类号： G10L19/008 ,  G10L25/18

摘要： A method of parametric coding of a multichannel digital audio signal including coding a signal arising from a channels reduction processing applied to the multichannel signal and coding spatialization information of the multichannel signal. The method includes the following acts: extraction of a plurality of items of spatialization information of the multichannel signal; obtaining at least one representation model of the extracted spatialization information; determination of at least one angle parameter of a model obtained; coding the at least one determined angle parameter so as to code the spatialization information extracted during the coding of spatialization information. Also provided are a method for decoding such a coded signal and corresponding coding and decoding devices.

公开(公告)号：US11349898B2

公开(公告)日：2022-05-31

申请号：US16972744

申请日：2019-06-03

申请人： ORANGE

发明人： Stephane Ragot ,  Jerome Dufour ,  Najmeddine Majed ,  Minh Tri Vo

IPC分类号： H04L65/60 ,  H04L47/38 ,  H04L69/24

摘要： A method for adapting an encoding bitrate of real-time signals of a real-time communication session between sender devices and receiver devices of communication terminals. A sender device includes a multi-bitrate encoder using a set of discrete bitrates. The method includes a test step of increasing the encoding bitrate at the sender device by transmitting at least one redundant packet according to selected transmission parameters. A method is also provided for determining a request to adapt the encoding bitrate of real-time signals in order to implement a test of increasing the encoding bitrate at the sender device by transmitting at least one redundant packet according to selected transmission parameters. A sender device and a receiver device implementing the methods are provides as well as a terminal containing these devices.

公开(公告)号：US10553223B2

公开(公告)日：2020-02-04

申请号：US16063090

申请日：2016-12-13

申请人： ORANGE

发明人： Bertrand Fatus ,  Stephane Ragot

IPC分类号： G10L19/008

摘要： A method for parametric encoding of a multi-channel digital audio signal. The method includes encoding a mono signal from channel-reduction processing applied to the multi-channel signal and encoding spatialisation information of the multi-channel signal. The channel-reduction processing includes the following steps, implemented for each spectral unit of the multi-channel signal: extracting at least one indicator characterizing the channels of the multi-channel digital audio signal; selecting, from a set of channel-reduction processing modes, a channel-reduction processing mode in accordance with the value of the at least one indicator characterizing the channels of the multi-channel audio signal. Also provides are a corresponding encoding device and a processing method which includes the channel-reduction processing.

公开(公告)号：US10431226B2

公开(公告)日：2019-10-01

申请号：US15303405

申请日：2015-04-24

申请人： ORANGE

发明人： Julien Faure ,  Stephane Ragot

IPC分类号： G10L19/20 ,  G10L25/81 ,  G10L25/93 ,  G10L19/005 ,  G10L19/028

摘要： A method for processing a digital audio signal, including a series of samples distributed in consecutive frames, is implemented when decoding the signal in order to replace at least one signal frame lost during decoding. The method includes the following steps: a) searching, in a valid signal segment available when decoding, for at least one period in the signal, determined in accordance with the valid signal; b) analyzing the signal in the period, in order to determine spectral components of the signal in the period; c) synthesizing at least one frame for replacing the lost frame, by construction of a synthesis signal from: an addition of components selected among the predetermined spectral components, and a noise added to the addition of components. In particular, the amount of noise added to the addition of components is weighted in accordance with voice information of the valid signal, obtained when decoding.

公开(公告)号：US20180182408A1

公开(公告)日：2018-06-28

申请号：US15329671

申请日：2015-07-27

申请人： ORANGE

发明人： Stephane Ragot ,  Julien Faure

IPC分类号： G10L19/24 ,  G10L19/002 ,  G10L19/02 ,  G10L19/12

摘要： A method of determining a distribution of bits for coding a transition frame, said method being implemented in a coder/decoder for coding/decoding a digital signal, the transition frame being preceded by a predictive coded preceding frame, coding the transition frame comprising transform coding and predictive coding a single sub-frame of the transition frame, the method comprising the following steps: assigning a bit rate for predictive coding the transition sub-frame, said bit rate being equal to the minimum between the bit rate for transform coding the transition frame and a first predetermined bit rate value; determining a first number of bits allocated for predictive coding the transition sub-frame for said bit rate; and calculating a second number of bits allocated for transform coding the transition frame from the first number of bits and a number of bits available for coding the transition frame.

公开(公告)号：US20170040021A1

公开(公告)日：2017-02-09

申请号：US15303405

申请日：2015-04-24

申请人： ORANGE

发明人： Julien Faure ,  Stephane Ragot

IPC分类号： G10L19/005 ,  G10L19/20 ,  G10L19/028 ,  G10L25/81

CPC分类号： G10L19/005 ,  G10L19/028 ,  G10L19/20 ,  G10L25/81 ,  G10L2025/932

摘要： A method for processing a digital audio signal, including a series of samples distributed in consecutive frames, is implemented when decoding the signal in order to replace at least one signal frame lost during decoding. The method includes the following steps: a) searching, in a valid signal segment available when decoding, for at least one period in the signal, determined in accordance with the valid signal; b) analyzing the signal in the period, in order to determine spectral components of the signal in the period; c) synthesizing at least one frame for replacing the lost frame, by construction of a synthesis signal from: an addition of components selected among the predetermined spectral components, and a noise added to the addition of components. In particular, the amount of noise added to the addition of components is weighted in accordance with voice information of the valid signal, obtained when decoding.

摘要翻译： 在对信号进行解码时，实现包括在连续帧中分布的一系列样本的数字音频信号的处理方法，以便替换在解码过程中丢失的至少一个信号帧。 该方法包括以下步骤：a）在解码时可用的有效信号段中，根据有效信号确定信号中的至少一个周期; b）分析周期中的信号，以确定该周期中的信号的频谱分量; c）通过构建合成信号来合成至少一个帧来替换丢失的帧，所述合成信号包括从预定频谱分量中选出的分量的添加以及添加到分量的添加中的噪声。 具体地，根据解码时获得的有效信号的语音信息来加权添加到分量中的噪声量。

公开(公告)号：US20160203826A1

公开(公告)日：2016-07-14

申请号：US14904555

申请日：2014-07-04

申请人： ORANGE

发明人： Magdalena Kaniewska ,  Stephane Ragot

IPC分类号： G10L19/087 ,  G10L19/24 ,  G10L25/72

摘要： A method and device are provided for determining an optimized scale factor to be applied to an excitation signal or a filter during a process for frequency band extension of an audio frequency signal. The band extension process includes decoding or extracting, in a first frequency band, an excitation signal and parameters of the first frequency band including coefficients of a linear prediction filter, generating an excitation signal extending over at least one second frequency band, filtering using a linear prediction filter for the second frequency band. The determination method includes determining an additional linear prediction filter, of a lower order than that of the linear prediction filter of the first frequency band, the coefficients of the additional filter being obtained from the parameters decoded or extracted from the first frequency band and calculating the optimized scale factor as a function of at least the coefficients of the additional filter.

摘要翻译： 提供一种方法和装置，用于在音频信号的频带扩展过程中确定要施加到激励信号或滤波器的优化比例因子。 频带扩展处理包括在第一频带中解码或提取激励信号和包括线性预测滤波器的系数的第一频带的参数，产生在至少一个第二频带上延伸的激励信号，使用线性 用于第二频带的预测滤波器。 确定方法包括：确定比第一频带的线性预测滤波器低的次序的附加线性预测滤波器，从根据从第一频带解码或提取的参数中获得附加滤波器的系数，并计算 作为至少是附加滤波器的系数的函数的优化的比例因子。

公开(公告)号：US20200175995A1

公开(公告)日：2020-06-04

申请号：US16782539

申请日：2020-02-05

申请人： ORANGE

发明人： Julien Faure ,  Stephane Ragot

IPC分类号： G10L19/005 ,  G10L19/20 ,  G10L19/022

摘要： A method for decoding a digital signal encoded using predictive coding and transform coding, comprising the following steps: predictive decoding of a preceding frame of the digital signal, encoded by a set of predictive coding parameters; detecting the loss of a current frame of the encoded digital signal; generating by prediction, from at least one predictive coding parameter encoding the preceding frame, a frame for replacing the current frame; generating by prediction, from at least one predictive coding parameter encoding the preceding frame, an additional segment of digital signal; temporarily storing said additional segment of digital signal.

公开(公告)号：US20200168236A1

公开(公告)日：2020-05-28

申请号：US16775569

申请日：2020-01-29

申请人： ORANGE

发明人： Stephane Ragot ,  Julien Faure

IPC分类号： G10L19/24 ,  G10L19/12 ,  G10L19/002 ,  G10L19/02

摘要： A method of determining a distribution of bits for coding a transition frame, said method being implemented in a coder/decoder for coding/decoding a digital signal, the transition frame being preceded by a predictive coded preceding frame, coding the transition frame comprising transform coding and predictive coding a single sub-frame of the transition frame, the method comprising the following steps: assigning a bit rate for predictive coding the transition sub-frame, said bit rate being equal to the minimum between the bit rate for transform coding the transition frame and a first predetermined bit rate value; determining a first number of bits allocated for predictive coding the transition sub-frame for said bit rate; and calculating a second number of bits allocated for transform coding the transition frame from the first number of bits and a number of bits available for coding the transition frame.