公开(公告)号：US20210258363A1

公开(公告)日：2021-08-19

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： H04L29/06 ,  H04L12/811

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：US20170213561A1

公开(公告)日：2017-07-27

申请号：US15329428

申请日：2015-07-27

申请人： ORANGE

发明人： Julien Faure ,  Stephane Ragot

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

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

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：US20170169831A1

公开(公告)日：2017-06-15

申请号：US15117100

申请日：2015-02-04

申请人： Orange

发明人： Magdalena Kaniewska ,  Stephane Ragot

IPC分类号： G10L19/02 ,  G10L25/21

CPC分类号： G10L19/0204 ,  B41K1/04 ,  B41K1/10 ,  B41K1/12 ,  B41K1/38 ,  B41K1/40 ,  B41K1/42 ,  B41K3/56 ,  G10L19/00 ,  G10L21/038 ,  G10L25/21

摘要： A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.

公开(公告)号：US09489964B2

公开(公告)日：2016-11-08

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 ,  G10L19/025

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：US20160293173A1

公开(公告)日：2016-10-06

申请号：US15036984

申请日：2014-11-14

申请人： ORANGE

发明人： Julien Faure ,  Stephane Ragot

IPC分类号： G10L19/02 ,  G10L19/26 ,  G10L19/16 ,  G10L19/022

CPC分类号： G10L19/0212 ,  G10L19/022 ,  G10L19/04 ,  G10L19/173 ,  G10L19/20 ,  G10L19/26

摘要： Methods and apparatus are provided for coding and decoding a digital audio signal. Decoding includes: decoding according to an inverse transform decoding of a previous frame of samples of the digital signal, which is received and coded according to a transform coding; and decoding according to a predictive decoding of a current frame of samples of the digital signal, which is received and coded according to a predictive coding. The predictive decoding of the current frame is a transition predictive decoding which does not use any adaptive dictionary arising from the previous frame. At least one state of the predictive decoding is reinitialized to a predetermined default value, and an add-overlap step combines a signal segment synthesized by predictive decoding of the current frame and a signal segment synthesized by inverse transform decoding, corresponding to a stored segment of the decoding of the previous frame.

摘要翻译： 提供了用于对数字音频信号进行编码和解码的方法和装置。 解码包括：根据对根据变换编码接收和编码的数字信号的先前帧的先前帧的逆变换解码进行解码; 以及根据对根据预测编码接收和编码的数字信号的当前样本帧的预测解码进行解码。 当前帧的预测解码是不使用从前一帧产生的任何自适应字典的转换预测解码。 预测解码的至少一个状态被重新初始化为预定的默认值，并且加法重叠步骤将通过当前帧的预测解码合成的信号段与通过逆变换解码合成的信号段相组合，对应于存储的 解码前一帧。

公开(公告)号：US11553022B2

公开(公告)日：2023-01-10

申请号：US16652606

申请日：2018-09-14

申请人： ORANGE

发明人： Stephane Ragot ,  Jerome Dufour ,  Najmeddine Majed

IPC分类号： H04L65/65 ,  H04L65/80 ,  H04L65/70 ,  H04L65/1104

摘要： A method, receiver device and terminal for signaling an adaptation request to adapt a coding/decoding of real-time signals of a real-time communication session, from a receiver device to a sender device. The method is such that the adaptation request relates to a demand for aggregation and/or redundancy of frames, that it is generated according to the existence of a signaling parameter arising from a phase of negotiation of codecs used during initialization of the communication session and in that it is transported via a real-time protocol of RTP type.

公开(公告)号：US10930290B2

公开(公告)日：2021-02-23

申请号：US16083741

申请日：2017-03-10

申请人： Orange

发明人： Bertrand Fatus ,  Stephane Ragot ,  Marc Emerit

IPC分类号： G10L13/00 ,  G10L13/02 ,  G10L13/033 ,  G10L15/02 ,  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：US20200236154A1

公开(公告)日：2020-07-23

申请号：US16652606

申请日：2018-09-14

申请人： ORANGE

发明人： Stephane Ragot ,  Jerome Dufour ,  Najmeddine Majed

IPC分类号： H04L29/06

摘要： A method, receiver device and terminal for signaling an adaptation request to adapt a coding/decoding of real-time signals of a real-time communication session, from a receiver device to a sender device. The method is such that the adaptation request relates to a demand for aggregation and/or redundancy of frames, that it is generated according to the existence of a signaling parameter arising from a phase of negotiation of codecs used during initialization of the communication session and in that it is transported via a real-time protocol of RTP type.

公开(公告)号：US09940943B2

公开(公告)日：2018-04-10

申请号：US15106684

申请日：2014-12-11

申请人： Orange

发明人： Stephane Ragot ,  Jerome Daniel ,  Balazs Kovesi

IPC分类号： G10L19/24 ,  H03H17/06 ,  G10L19/02 ,  G10L19/022

CPC分类号： G10L19/24 ,  G10L19/0204 ,  G10L19/022 ,  H03H17/0621 ,  H03H2218/14

摘要： A method for resampling an audio-frequency signal with an output sampling frequency, for a current signal frame. The method is used when the preceding frame is sampled at a first sampling frequency which is different from a second sampling frequency of the current frame. The method includes: determining a first and second segments of the signal by adding samples at zero at the end of stored samples of the preceding frame and at the start of samples of the current frame, respectively; obtaining the first resampled segment and the second resampled segment by applying at least one resampling filter respectively to the first segment resampling the first frequency at the output frequency, and to the second segment resampling the second frequency at the output frequency; and combining the overlapping portion of the first and second resampled segments to obtain at least one portion of the resampled current frame.

公开(公告)号：US09613629B2

公开(公告)日：2017-04-04

申请号：US14764422

申请日：2014-01-30

申请人： ORANGE

发明人： Julien Faure ,  Stephane Ragot

IPC分类号： G10L19/02 ,  G10L19/005 ,  G10L19/06 ,  G10L19/12 ,  G10L19/00

CPC分类号： G10L19/02 ,  G10L19/005 ,  G10L19/06 ,  G10L19/12 ,  G10L2019/0016

摘要： A signal processing device, media, and method are provided, where a signal comprises a succession of samples distributed in successive frames. The processing is implemented during decoding of such a signal in order to replace at least one signal frame lost in decoding, and comprising in particular: a) searching, in a valid signal available to the decoder, for a signal segment of length corresponding to a period set as a function of the valid signal; b) analyzing a spectrum of the segment in order to determine spectral components of the segment; and c) synthesizing at least one replacement frame for the lost frame by construction of a synthesized signal from at least a portion of the spectral components.