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公开(公告)号：US20220262383A1
公开(公告)日：2022-08-18
申请号：US17737949
申请日：2022-05-05
发明人： Markus LOHWASSER , Manuel JANDER , Max NEUENDORF , Ralf GEIGER , Markus SCHNELL , Matthias HILDENBRAND , Tobias CHALUPKA
摘要： An apparatus for processing an audio signal includes a configurable first audio signal processor for processing the audio signal in accordance with different configuration settings to obtain a processed audio signal, wherein the apparatus is adapted so that different configuration settings result in different sampling rates of the processed audio signal. The apparatus furthermore includes n analysis filter bank having a first number of analysis filter bank channels, a synthesis filter bank having a second number of synthesis filter bank channels, a second audio processor being adapted to receive and process an audio signal having a predetermined sampling rate, and a controller for controlling the first number of analysis filter bank channels or the second number of synthesis filter bank channels in accordance with a configuration setting.
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公开(公告)号：US20210074307A1
公开(公告)日：2021-03-11
申请号：US17103609
申请日：2020-11-24
IPC分类号： G10L19/087 , G10L19/002 , G10L19/028 , G10L19/12
摘要： An audio decoder provides a decoded audio information on the basis of an encoded audio information including linear prediction coefficients (LPC) and includes a tilt adjuster to adjust a tilt of a noise using linear prediction coefficients of a current frame to acquire a tilt information and a noise inserter configured to add the noise to the current frame in dependence on the tilt information. Another audio decoder includes a noise level estimator to estimate a noise level for a current frame using a linear prediction coefficient of at least one previous frame to acquire a noise level information; and a noise inserter to add a noise to the current frame in dependence on the noise level information provided by the noise level estimator. Thus, side information about a background noise in the bit-stream may be omitted. Methods and computer programs serve a similar purpose.
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公开(公告)号：US20200273466A1
公开(公告)日：2020-08-27
申请号：US16808159
申请日：2020-03-03
IPC分类号： G10L19/005 , G10L19/06 , G10L19/028 , G10L19/09
摘要： An apparatus for generating an error concealment signal includes an LPC (linear prediction coding) representation generator for generating a first replacement LPC representation and a different second replacement LPC representation; an LPC synthesizer for filtering a first codebook information using the first replacement representation to obtain a first replacement signal and for filtering a different second codebook information using the second replacement LPC representation to obtain a second replacement signal; and a replacement signal combiner for combining the first replacement signal and the second replacement signal to obtain the error concealment signal.
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公开(公告)号：US20170133031A1
公开(公告)日：2017-05-11
申请号：US15417234
申请日：2017-01-27
IPC分类号： G10L21/0232 , G10L21/038 , G10L25/21
CPC分类号： G10L21/0232 , G10L19/012 , G10L21/0216 , G10L21/038 , G10L25/03 , G10L25/21
摘要： A method is described that estimates noise in an audio signal. An energy value for the audio signal is estimated and converted into the logarithmic domain. A noise level for the audio signal is estimated based on the converted energy value.
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5.发明申请APPARATUS AND METHOD FOR GENERATING AN ERROR CONCEALMENT SIGNAL USING AN ADAPTIVE NOISE ESTIMATION 审中-公开使用自适应噪声估计产生错误信号信号的装置和方法公开(公告)号：US20170004834A1
公开(公告)日：2017-01-05
申请号：US15267809
申请日：2016-09-16
IPC分类号： G10L19/005 , G10L19/028 , G10L19/06
CPC分类号： G10L19/005 , G10L19/028 , G10L19/06 , G10L2019/0002
摘要： An apparatus for generating an error concealment signal, includes: an LPC representation generator for generating a replacement LPC representation; an LPC synthesizer for filtering a codebook information using the replacement LPC representation; and a noise estimator for estimating a noise estimate during a reception of good audio frames, wherein the noise estimate depends on the good audio frames representation generator is configured to use the noise estimate estimated by the noise estimator in generating the replacement LPC representation.
摘要翻译： 一种用于产生错误隐藏信号的装置，包括：用于产生替换LPC表示的LPC表示生成器; LPC合成器，用于使用替换LPC表示对码本信息进行滤波; 以及用于在接收良好音频帧期间估计噪声估计的噪声估计器，其中所述噪声估计取决于良好音频帧表示生成器被配置为使用由噪声估计器估计的噪声估计来生成替换LPC表示。
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公开(公告)号：US20240135943A1
公开(公告)日：2024-04-25
申请号：US18537655
申请日：2023-12-12
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/005 , G10L19/022 , G10L19/03 , G10L19/12 , G10L19/20
CPC分类号： G10L19/26 , G10L19/005 , G10L19/022 , G10L19/03 , G10L19/12 , G10L19/20 , G10L21/0364
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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公开(公告)号：US20220157328A1
公开(公告)日：2022-05-19
申请号：US17592423
申请日：2022-02-03
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/022 , G10L19/20 , G10L19/12
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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8.发明申请公开(公告)号：US20190272839A1
公开(公告)日：2019-09-05
申请号：US16256937
申请日：2019-01-24
IPC分类号： G10L19/22 , G10L19/12 , G10L19/26 , G10L19/09 , G10L19/032
摘要： An apparatus for selecting one of a first encoding algorithm and a second encoding algorithm includes a filter configured to receive the audio signal, to reduce the amplitude of harmonics in the audio signal and to output a filtered version of the audio signal. First and second estimators are provided for estimating first and second quality measures in the form of SNRs of segmented SNRs associated with the first and second encoding algorithms without actually encoding and decoding the portion of the audio signal using the first and second encoding algorithms. A controller is provided for selecting the first encoding algorithm or the second encoding algorithm based on a comparison between the first quality measure and the second quality measure.
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公开(公告)号：US20170133028A1
公开(公告)日：2017-05-11
申请号：US15412920
申请日：2017-01-23
发明人： Emmanuel RAVELLI , Manuel JANDER , Grzegorz PIETRZYK , Martin DIETZ , Marc GAYER
IPC分类号： G10L19/26 , G10L19/12 , G10L19/022 , G10L19/20
CPC分类号： G10L19/26 , G10L19/022 , G10L19/12 , G10L19/20 , G10L21/0364 , G11B27/038
摘要： A method is described that processes an audio signal. A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering.
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10.发明申请Apparatus and method for generating an error concealment signal using individual replacement LPC representations for individual codebook information 审中-公开用于针对各个码本信息使用各个替换LPC表示来产生错误隐藏信号的装置和方法公开(公告)号：US20170004833A1
公开(公告)日：2017-01-05
申请号：US15267768
申请日：2016-09-16
IPC分类号： G10L19/005 , G10L19/028 , G10L19/09
CPC分类号： G10L19/005 , G10L19/028 , G10L19/06 , G10L19/09 , G10L2019/0002 , G10L2019/0016
摘要： An apparatus for generating an error concealment signal includes an LPC (linear prediction coding) representation generator for generating a first replacement LPC representation and a different second replacement LPC representation; an LPC synthesizer for filtering a first codebook information using the first replacement representation to obtain a first replacement signal and for filtering a different second codebook information using the second replacement LPC representation to obtain a second replacement signal; and a replacement signal combiner for combining the first replacement signal and the second replacement signal to obtain the error concealment signal.
摘要翻译： 用于产生错误隐藏信号的装置包括用于产生第一替换LPC表示和不同的第二替换LPC表示的LPC（线性预测编码）表示产生器; LPC合成器，用于使用第一替换表示对第一码本信息进行滤波以获得第一替换信号，并且使用第二替换LPC表示对不同的第二码本信息进行滤波以获得第二替换信号; 以及替换信号组合器，用于组合第一替换信号和第二替换信号以获得错误隐藏信号。
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