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1. 发明授权

US10242683B2 Optimized mixing of audio streams encoded by sub-band encoding 有权
公开(公告)号：US10242683B2
公开(公告)日：2019-03-26
申请号：US14773305
申请日：2014-03-24
申请人： ORANGE
发明人： Arnault Nagle , Claude Lamblin , Balazs Kovesi
IPC分类号： G10L25/93 , G10L19/16 , H04M3/56 , G10L19/24 , G10L19/00 , G10L19/008
摘要： The invention relates to a method for mixing a plurality of audio streams coded according to a frequency sub-band coding, comprising the steps for decoding (E201) a part of the coded streams over at least a first frequency sub-band, for summing (E202) the streams thus decoded so as to form at least a first mixed stream. The method is such that it comprises the steps for detection (E203), over at least a second frequency sub-band different from the at least first sub-band, of the presence of a predetermined frequency band in the plurality of coded audio streams and for summing (E205) the decoded audio streams (E204) for which the presence of the predetermined frequency band has been detected, over said at least a second sub-band, so as to form at least a second mixed stream.The invention also relates to a mixing device implementing the method described and may be integrated into a conference bridge, a communications terminal or a communications gateway.

2. 发明申请

US20170148461A1 UPDATE OF POST-PROCESSING STATES WITH VARIABLE SAMPLING FREQUENCY ACCORDING TO THE FRAME 有权
公开(公告)号：US20170148461A1
公开(公告)日：2017-05-25
申请号：US15325643
申请日：2015-07-06
申请人： ORANGE
发明人： Jerome Daniel , Balazs Kovesi
IPC分类号： G10L19/24 , G10L19/12 , G10L19/26
摘要： A method and apparatus are provided for updating post-processing states applied to a decoded audio signal. The method is such that, for a current decoded signal frame, sampled at a different sampling frequency from the preceding frame, it includes the following acts: obtaining a past decoded signal, stored for the preceding frame; re-sampling by interpolation of the past decoded signal obtained; using the re-sampled past decoded signal as a memory for post-processing the current frame. A decoding method is also provided, which includes updating post-processing states.

3. 发明授权

US09489964B2 Effective pre-echo attenuation in a digital audio signal 有权
标题翻译：数字音频信号中有效的前回波衰减
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。

4. 发明申请

US20160019903A1 OPTIMIZED MIXING OF AUDIO STREAMS ENCODED BY SUB-BAND ENCODING 审中-公开
标题翻译：通过子带编码编码的音频流优化混合
公开(公告)号：US20160019903A1
公开(公告)日：2016-01-21
申请号：US14773305
申请日：2014-03-24
申请人： ORANGE
发明人： Arnault Nagle , Claude Lamblin , Balazs Kovesi
IPC分类号： G10L19/16 , G10L19/24
CPC分类号： G10L19/167 , G10L19/008 , G10L19/173 , G10L19/24 , G10L2019/0014 , G10L2025/937 , H04M3/568
摘要： The invention relates to a method for mixing a plurality of audio streams coded according to a frequency sub-band coding, comprising the steps for decoding (E201) a part of the coded streams over at least a first frequency sub-band, for summing (E202) the streams thus decoded so as to form at least a first mixed stream. The method is such that it comprises the steps for detection (E203), over at least a second frequency sub-band different from the at least first sub-band, of the presence of a predetermined frequency band in the plurality of coded audio streams and for summing (E205) the decoded audio streams (E204) for which the presence of the predetermined frequency band has been detected, over said at least a second sub-band, so as to form at least a second mixed stream.The invention also relates to a mixing device implementing the method described and may be integrated into a conference bridge, a communications terminal or a communications gateway.
摘要翻译：本发明涉及一种用于混合根据频率子带编码编码的多个音频流的方法，包括以下步骤：通过至少第一频率子带对一部分编码流进行解码（E201），用于求和（ E202）如此解码的流以形成至少第一混合流。该方法包括在多个编码音频流中存在预定频带的检测步骤（E203），至少与至少第一子频带不同的第二频率子带，以及用于对所述至少第二子带的所述解码音频流（E204）进行求和（E205），所述解码音频流（E204）在所述至少第二子带上被检测，以便形成至少第二混合流。本发明还涉及实现所描述的方法的混合装置，并且可以集成到会议桥，通信终端或通信网关中。

5. 发明授权

US10424313B2 Update of post-processing states with variable sampling frequency according to the frame 有权
公开(公告)号：US10424313B2
公开(公告)日：2019-09-24
申请号：US15325643
申请日：2015-07-06
申请人： ORANGE
发明人： Jerome Daniel , Balazs Kovesi
IPC分类号： G10L19/24 , G10L19/26 , G10L19/12 , G10L19/18
摘要： A method and apparatus are provided for updating post-processing states applied to a decoded audio signal. The method is such that, for a current decoded signal frame, sampled at a different sampling frequency from the preceding frame, it includes the following acts: obtaining a past decoded signal, stored for the preceding frame; re-sampling by interpolation of the past decoded signal obtained; using the re-sampled past decoded signal as a memory for post-processing the current frame. A decoding method is also provided, which includes updating post-processing states.

6. 发明申请

US20170263263A1 DISCRIMINATION AND ATTENUATION OF PRE ECHOES IN A DIGITAL AUDIO SIGNAL 审中-公开
公开(公告)号：US20170263263A1
公开(公告)日：2017-09-14
申请号：US15510831
申请日：2015-09-11
申请人： Orange
发明人： Balazs Kovesi , Stephane Ragot
IPC分类号： G10L19/26 , G10L25/51 , G10L19/02 , G10L25/21
CPC分类号： G10L19/26 , G10L19/0204 , G10L25/21 , G10L25/51
摘要： A method for discriminating and attenuating pre-echo in a digital audio signal and generated from transform coding. The method includes the following acts in which, for a current frame broken down into sub-blocks, the low-energy sub-blocks precede a sub-block in which a transition or attack is detected, and determine a pre-echo area in which a pre-echo attenuation process is carried out. In the event that an attack is detected from the sub-block of the current frame, the method includes: calculating an energy leading coefficient for at least two sub-blocks of the current frame preceding the sub-block in which an attack is detected; comparing the leading coefficient to a predefined threshold; and inhibiting the pre-echo attenuation process in the pre-echo area in the event that the calculated leading coefficient is lower than the predefined threshold. Also provided are a discrimination and attenuation device implementing the acts of the method described and a decoder including such a device.

7. 发明申请

US20160343384A1 RESAMPLING OF AN AUDIO SIGNAL INTERRUPTED WITH A VARIABLE SAMPLING FREQUENCY ACCORDING TO THE FRAME 有权
标题翻译：根据框架对可变采样频率中断的音频信号的重新排列
公开(公告)号：US20160343384A1
公开(公告)日：2016-11-24
申请号：US15106684
申请日：2014-12-11
申请人： ORANGE
发明人： Stéphane Ragot , Jérôme Daniel , Balazs Kovesi
IPC分类号： G10L19/24 , G10L19/022 , G10L19/02 , H03H17/06
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.
摘要翻译：一种用于针对当前信号帧以输出采样频率重新采样音频信号的方法。当以与当前帧的第二采样频率不同的第一采样频率对前一帧进行采样时，使用该方法。该方法包括：通过在前一帧的存储样本的结尾处和当前帧的采样开始处分别在零加上采样来确定信号的第一和第二段; 通过将至少一个重采样滤波器分别施加到在输出频率处重新采样第一频率的第一频段和在输出频率对第二频率重采样的第二分段来获得第一重采样分段和第二重采样分段; 以及组合第一和第二重采样段的重叠部分以获得重新采样的当前帧的至少一部分。

8. 发明授权

US10510357B2 Resampling of an audio signal by interpolation for low-delay encoding/decoding 有权
公开(公告)号：US10510357B2
公开(公告)日：2019-12-17
申请号：US15322312
申请日：2015-06-25
申请人： Orange
发明人： Balazs Kovesi , Stephane Ragot
IPC分类号： G10L19/24 , G10L19/02 , G10L19/26 , G06F17/11 , G06F17/17 , G10L21/00 , H03H17/02
摘要： A method is provided for resampling an audio-frequency signal in an audio-frequency signal encoding or decoding operation. The resampling is carried out by a method of interpolation of an order greater than one. The method is such that the interpolated samples are obtained by calculating a weighted average of possible interpolation values calculated over a plurality of intervals covering the time location of the sample to be interpolated. A resampling device is provided, which implements the method, and also an encoder and decoder including at least one resampling device.

9. 发明授权

US10170126B2 Effective attenuation of pre-echoes in a digital audio signal 有权
公开(公告)号：US10170126B2
公开(公告)日：2019-01-01
申请号：US14654791
申请日：2013-12-20
申请人： Orange
发明人： Balazs Kovesi , Stephane Ragot
IPC分类号： H04B3/21 , G10L21/02 , G10L19/012
摘要： A method is provided for processing attenuation of pre-echo in a digital audio signal decoded by transform decoding. The method includes the following acts: decomposition of the decoded signal into at least two sub-signals according to a pre-determined decomposition criterion; calculation of attenuation factors per sub-signal and per sample of a previously determined pre-echo zone; attenuation of pre-echo in the pre-echo zone of each of the sub-signals by applying attenuation factors to the sub-signals; and production of the attenuated signal by addition of the attenuated sub-signals. Also provided are a processing device implementing the acts of the described method, and a decoder including such a device.

10. 发明授权

US10083705B2 Discrimination and attenuation of pre echoes in a digital audio signal 有权
公开(公告)号：US10083705B2
公开(公告)日：2018-09-25
申请号：US15510831
申请日：2015-09-11
申请人： Orange
发明人： Balazs Kovesi , Stephane Ragot
IPC分类号： G10L19/26 , G10L25/51 , G10L25/21 , G10L19/02
CPC分类号： G10L19/26 , G10L19/0204 , G10L25/21 , G10L25/51
摘要： A method for discriminating and attenuating pre-echo in a digital audio signal and generated from transform coding. The method includes the following acts in which, for a current frame broken down into sub-blocks, the low-energy sub-blocks precede a sub-block in which a transition or attack is detected, and determine a pre-echo area in which a pre-echo attenuation process is carried out. In the event that an attack is detected from the sub-block of the current frame, the method includes: calculating an energy leading coefficient for at least two sub-blocks of the current frame preceding the sub-block in which an attack is detected; comparing the leading coefficient to a predefined threshold; and inhibiting the pre-echo attenuation process in the pre-echo area in the event that the calculated leading coefficient is lower than the predefined threshold. Also provided are a discrimination and attenuation device implementing the acts of the method described and a decoder including such a device.

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