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21. 发明公开

EP4030426A1 METHOD AND APPARATUS FOR PROCESSING AN AUDIO SIGNAL, AUDIO DECODER AND AUDIO ENCODER 有权
公开(公告)号：EP4030426A1
公开(公告)日：2022-07-20
申请号：EP22160064.6
申请日：2015-07-03
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Ravelli, Emmanuel , Jander, Manuel , Pietrzyk, Grzegorz , Dietz, Martin , Gayer, Marc
IPC分类号： G10L19/26 , G10L19/06 , G11B27/038 , G10L21/0364
摘要： A method for processing an audio signal is described, which uses linear predictive filtering for removing a discontinuity between a filtered past frame and a filtered current frame of the audio signal. The method comprises filtering the current frame of the audio signal and removing the discontinuity by modifying a beginning portion of the filtered current frame by a signal obtained by linear predictive filtering a predefined signal with initial states of the linear predictive filter defined on the basis of a last part of the unfiltered past frame filtered using the set of filter parameters for filtering the current frame. The linear predictive filter is defined as A z = 1 ∑ m = 0 M a m z − m with M the filter order and a m the filter coefficients, with α 0 = 1.

22. 发明公开

EP3503098A1 APPARATUS AND METHOD DECODING AN AUDIO SIGNAL USING AN ALIGNED LOOK-AHEAD PORTION 有权转让
公开(公告)号：EP3503098A1
公开(公告)日：2019-06-26
申请号：EP19157006.8
申请日：2012-02-14
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Ravelli, Emmanuel , Geiger, Ralf , Schnell, Markus , Fuchs, Guillaume , Ruoppila, Vesa , Bäckström, Tom , Grill, Bernhard , Helmrich, Christian
IPC分类号： G10L19/022 , G10L19/18
摘要： An audio decoder for decoding an encoded audio signal, comprises: a prediction parameter decoder (180) for performing a decoding of data for a prediction coded frame from the encoded audio signal; a transform parameter decoder (183) for performing a decoding of data for a transform coded frame from the encoded audio signal, wherein the transform parameter decoder (183) is configured for performing a spectral-time transform and for applying a synthesis window to transformed data to obtain data for the current frame and a future frame, the synthesis window having a first overlap portion, an adjacent second overlap portion and an adjacent third overlap portion (206), the third overlap portion being associated with audio samples for the future frame and the non-overlap portion (208) being associated with data of the current frame; and an overlap-adder (184) for overlapping and adding synthesis windowed samples associated with the third overlap portion of a synthesis window for the current frame and synthesis windowed samples associated with the first overlap portion of a synthesis window for the future frame to obtain a first portion of audio samples for the future frame, wherein a rest of the audio samples for the future frame are synthesis windowed samples associated with the second non-overlapping portion of the synthesis window for the future frame obtained without overlap-adding, when the current frame and the future frame comprise transform-coded data.

23. 发明公开

EP3407351A1 METHOD AND APPARATUS FOR PROCESSING AN AUDIO SIGNAL, AUDIO DECODER, AND AUDIO ENCODER 有权
公开(公告)号：EP3407351A1
公开(公告)日：2018-11-28
申请号：EP18182785.8
申请日：2015-07-03
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Ravelli, Emmanuel , Jander, Manuel , Pietrzyk, Grzegorz , Dietz, Martin , Gayer, Marc
IPC分类号： G10L19/20 , G10L19/022 , G11B27/038 , G10L19/12 , G10L19/26 , G10L21/02 , G10L21/0364
摘要： A method is described that processes an audio signal (100). A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering (102, 110, 112).

24. 发明公开

EP3067887A1 AUDIO ENCODER FOR ENCODING A MULTICHANNEL SIGNAL AND AUDIO DECODER FOR DECODING AN ENCODED AUDIO SIGNAL 审中-公开
标题翻译：音频编码器进行编码的多通道信号和声音解码器进行解码编码的音频信号
公开(公告)号：EP3067887A1
公开(公告)日：2016-09-14
申请号：EP15172599.1
申请日：2015-06-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Fuchs, Guillaume , Ravelli, Emmanuel , Neukam, Christian , Schmidt, Konstantin , Benndorf, Conrad , Niedermeier, Andreas , Schubert, Benjamin , Geiger, Ralf
IPC分类号： G10L19/008 , G10L19/04 , G10L19/02 , G10L21/038 , G10L19/18
CPC分类号： G10L19/008 , G10L19/02 , G10L19/032 , G10L19/04 , G10L19/13 , G10L19/18 , G10L21/038
摘要： Audio encoder 2" for encoding a multichannel signal 4 is shown. The audio encoder comprises a downmixer 12 for downmixing the multichannel signal 4 to obtain a downmix signal 14, a linear prediction domain core encoder 16 for encoding the downmix signal 14, wherein the downmix signal 14 has a low band and a high band, wherein the linear prediction domain core encoder 16 is configured to apply a bandwidth extension processing for parametrically encoding the high band, a filterbank 82 for generating a spectral representation of the multichannel signal 4, and a joint multichannel encoder 18 configured to process the spectral representation comprising the low band and the high band of the multichannel signal to generate multichannel information 20.
摘要翻译：被示出音频编码器2“用于编码的多通道信号4，音频编码器包括下混频器12，用于降混多声道信号4以获得降混信号14，用于编码所述降混信号14的线性预测域核心编码器16，worin缩混信号14具有低频带和高频带，worin线性预测域核心编码器16被配置为应用带宽扩展处理以参数编码所述高频带，用于产生多声道信号4的频谱表示的滤波器组82和联合多声道编码器18被配置为处理所述频谱表示包括低带和所述多信道信号的高频带，以产生多声道信息第二十

25. 发明授权

EP3407351B1 METHODS FOR ENCODING AND DECODING AN AUDIO SIGNAL, AUDIO DECODER AND AUDIO ENCODER 有权
公开(公告)号：EP3407351B1
公开(公告)日：2020-01-01
申请号：EP18182785.8
申请日：2015-07-03
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Ravelli, Emmanuel , Jander, Manuel , Pietrzyk, Grzegorz , Dietz, Martin , Gayer, Marc
IPC分类号： G10L19/20 , G10L19/022 , G11B27/038 , G10L19/12 , G10L19/26 , G10L21/02 , G10L21/0364

26. 发明公开

EP3511936A1 AUDIO CODING USING A FREQUENCY DOMAIN PROCESSOR AND A TIME DOMAIN PROCESSOR 有权转让
公开(公告)号：EP3511936A1
公开(公告)日：2019-07-17
申请号：EP19160134.3
申请日：2015-07-24
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Dietz, Martin , Multrus, Markus , Fuchs, Guillaume , Ravelli, Emmanuel , Neusinger, Matthias , Schnell, Markus , Schubert, Benjamin , Grill, Bernhard
IPC分类号： G10L19/18 , G10L19/02 , G10L19/028 , G10L19/04 , G10L19/24 , G10L21/038
摘要： An audio encoder for encoding an audio signal, comprises: a first encoding processor (600) for encoding a first audio signal portion in a frequency domain, wherein the first encoding processor (600) comprises: a time frequency converter (602) for converting the first audio signal portion into a frequency domain representation having spectral lines up to a maximum frequency of the first audio signal portion; an analyzer (604) for analyzing the frequency domain representation up to the maximum frequency to determine first spectral portions to be encoded with a first spectral resolution and second spectral regions to be encoded with a second spectral resolution, the second spectral resolution being lower than the first spectral resolution; a spectral encoder (606) for encoding the first spectral portions with the first spectral resolution and for encoding the second spectral portions with the second spectral resolution; a second encoding processor (610) for encoding a second different audio signal portion in the time domain; a controller (620) configured for analyzing the audio signal and for determining, which portion of the audio signal is the first audio signal portion encoded in the frequency domain and which portion of the audio signal is the second audio signal portion encoded in the time domain; and an encoded signal former (630) for forming an encoded audio signal comprising a first encoded signal portion for the first audio signal portion and a second encoded signal portion for the second audio signal portion.

27. 发明公开

EP3067886A1 AUDIO ENCODER FOR ENCODING A MULTICHANNEL SIGNAL AND AUDIO DECODER FOR DECODING AN ENCODED AUDIO SIGNAL 审中-公开
标题翻译：音频编码器进行编码的多通道信号和声音解码器进行解码编码的音频信号
公开(公告)号：EP3067886A1
公开(公告)日：2016-09-14
申请号：EP15172594.2
申请日：2015-06-17
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Fuchs, Guillaume , Ravelli, Emmanuel , Neukam, Christian , Schmidt, Konstantin , Benndorf, Conrad , Niedermeier, Andreas , Schubert, Benjamin , Geiger, Ralf
IPC分类号： G10L19/008 , G10L19/18 , G10L19/02 , G10L19/04
CPC分类号： G10L19/008 , G10L19/02 , G10L19/032 , G10L19/04 , G10L19/13 , G10L19/18 , G10L21/038
摘要： A schematic block diagram of an audio encoder 2 for encoding a multichannel audio signal 4 is shown. The audio encoder comprises a linear prediction domain encoder 6, a frequency domain encoder 8, and a controller 10 for switching between the linear prediction domain encoder 6 and the frequency domain encoder 8. The controller is configured such that a portion of the multichannel signal is represented either by an encoded frame of the linear prediction domain encoder or by an encoded frame of the frequency domain encoder. The linear prediction domain encoder comprises a downmixer 12 for downmixing the multichannel signal 4 to obtain a downmixed signal 14. The linear prediction domain encoder further comprises a linear prediction domain core encoder 16 for encoding the downmix signal and furthermore, the linear prediction domain encoder comprises a first joint multichannel encoder 18 for generating first multichannel information 20 from the multichannel signal 4.
摘要翻译：音频编码器2用于编码多声道音频信号4的示意性框图中示出。该音频编码器包括线性预测域编码器6，频域编码器8，以及用于线性预测域编码器6和频域编码器8，控制器被配置搜索之间切换的控制器10所做的多通道信号的一部分是由线性预测域编码器的经编码的帧的任一者或通过在频域编码器的经编码的帧来表示。线性预测域编码器包括下混频器12，用于降混多声道信号4以获得下混频信号14的线性预测域编码器还包括线性预测域核心编码器16，用于编码下混合信号，进一步，线性预测域编码器包括第一联合多声道编码器18，用于从多通道信号产生第一多声道信息20 4

28. 发明公开

EP2988300A1 Switching of sampling rates at audio processing devices 审中-公开
标题翻译： Schalten von Abtastraten bei Audioverarbeitungsvorrichtungen
公开(公告)号：EP2988300A1
公开(公告)日：2016-02-24
申请号：EP14181307.1
申请日：2014-08-18
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Döhla, Stefan , Fuchs, Guillaume , Grill, Bernhard , Multrus, Markus , Pietrzyk, Grzegorz , Ravelli, Emmanuel , Schnell, Markus
IPC分类号： G10L19/24 , G10L19/04 , G10L19/16
CPC分类号： G10L19/24 , G10L19/04 , G10L19/173 , G10L2019/0002
摘要： Audio decoder device for decoding a bitstream, the audio decoder device comprising:
a predictive decoder for producing a decoded audio frame from the bitstream, wherein the predictive decoder comprises a parameter decoder for producing one or more audio parameters for the decoded audio frame from the bitstream and wherein the predictive decoder comprises a synthesis filter device for producing the decoded audio frame by synthesizing the one or more audio parameters for the decoded audio frame;
a memory device comprising one or more memories, wherein each of the memories is configured to store a memory state for the decoded audio frame, wherein the memory state for the decoded audio frame of the one or more memories is used by the synthesis filter device for synthesizing the one or more audio parameters for the decoded audio frame; and
a memory state resampling device configured to determine the memory state for synthesizing the one or more audio parameters for the decoded audio frame, which has a sampling rate, for one or more of said memories by resampling a preceding memory state for synthesizing one or more audio parameters for a preceding decoded audio frame, which has a preceding sampling rate being different from the sampling rate of the decoded audio frame, for one or more of said memories and to store the memory state for synthesizing of the one or more audio parameters for the decoded audio frame for one or more of said memories into the respective memory.
摘要翻译：一种音频解码器装置，用于解码比特流，所述音频解码器装置包括：预测解码器，用于从所述比特流产生解码的音频帧，其中所述预测解码器包括参数解码器，用于从所述比特流产生用于解码的音频帧的一个或多个音频参数并且其中所述预测解码器包括合成滤波器装置，用于通过合成用于解码的音频帧的一个或多个音频参数来产生解码的音频帧; 包括一个或多个存储器的存储器件，其中每个存储器被配置为存储用于解码音频帧的存储器状态，其中所述一个或多个存储器的解码音频帧的存储状态由合成滤波器装置用于合成用于解码的音频帧的一个或多个音频参数; 以及存储器状态重采样装置，被配置为通过重新采样用于合成一个或多个的前一个存储器状态来确定用于为一个或多个所述存储器合成用于具有采样率的解码音频帧的一个或多个音频参数的存储器状态用于一个或多个所述存储器的先前解码音频帧的音频参数，其具有与解码的音频帧的采样率不同的先前采样率，并且存储用于合成一个或多个音频参数的存储器状态，用于将用于一个或多个所述存储器的解码音频帧转换为相应的存储器。

29. 发明公开

EP2980796A1 Method and apparatus for processing an audio signal, audio decoder, and audio encoder 审中-公开
标题翻译： Verfahren und Vorrichtung zur Verarbeitung eines Audiosignals，Audiodecodierer und Audiocodierer
公开(公告)号：EP2980796A1
公开(公告)日：2016-02-03
申请号：EP14178821.6
申请日：2014-07-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Ravelli, Emmanuel , JANDER, Manuel , Pietrzyk, Grzegorz , Dietz, Martin , Gayer, Marc
IPC分类号： G10L19/20 , G10L19/022 , G11B27/038 , G10L21/02
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 (100). A discontinuity between a filtered past frame and a filtered current frame of the audio signal is removed using linear predictive filtering (102, 110, 112).
摘要翻译：描述了处理音频信号（100）的方法。使用线性预测滤波（102,110,112）去除滤波的过去帧和音频信号的滤波的当前帧之间的不连续性。

30. 发明公开

EP2980795A1 Audio encoding and decoding using a frequency domain processor, a time domain processor and a cross processor for initialization of the time domain processor 审中-公开
标题翻译：音频编码和解码与使用频域处理器，时域处理器和交叉处理器的初始化时域处理器
公开(公告)号：EP2980795A1
公开(公告)日：2016-02-03
申请号：EP14178819.0
申请日：2014-07-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： Disch, Sascha , Dietz, Martin , Multrus, Markus , Fuchs, Guillaume , Ravelli, Emmanuel , Neusinger, Matthias , Schnell, Markus , Schubert, Benjamin , Grill, Bernhard
IPC分类号： G10L19/18 , G10L19/02 , G10L19/028 , G10L19/04 , G10L19/24 , G10L21/038
CPC分类号： G10L19/0208 , G10L19/02 , G10L19/022 , G10L19/028 , G10L19/04 , G10L19/083 , G10L19/18 , G10L19/24 , G10L19/26 , G10L21/038 , G10L2019/0001
摘要： An audio encoder for encoding an audio signal, comprises: a first encoding processor (600) for encoding a first audio signal portion in a frequency domain, wherein the first encoding processor (600) comprises: a time frequency converter for converting the first audio signal portion into a frequency domain representation having spectral lines up to a maximum frequency of the first audio signal portion; a spectral encoder for encoding the frequency domain representation; a second encoding processor for encoding a second different audio signal portion in the time domain; a cross-processor (700) for calculating, from the encoded spectral representation of the first audio signal portion, initialization data of the second encoding processor (610), so that the second encoding processing (610) is initialized to encode the second audio signal portion immediately following the first audio signal portion in time in the audio signal; a controller configured for analyzing the audio signal and for determining, which portion of the audio signal is the first audio signal portion encoded in the frequency domain and which portion of the audio signal is the second audio signal portion encoded in the time domain; and an encoded signal former for forming an encoded audio signal comprising a first encoded signal portion for the first audio signal portion and a second encoded signal portion for the second audio signal portion.
摘要翻译：对于音频信号的编码的音频编码器，包括：用于在频域中编码的第一音频信号部分，worin第一编码处理装置（600）的第一编码处理装置（600）包括：时间频率转换器，用于将第一音频信号在部分为具有频谱线到第一音频信号部分的最大频率的频域表示; 的频谱编码器，用于编码所述频域表示; 第二编码处理器，用于编码在时域不同的第二音频信号部分; 的横处理器（700），用于计算从所述第一音频信号部分的编码频谱表示，第二编码处理器（610）的初始化数据，象第二编码处理（610）被初始化以编码所述第二音频信号在紧接在所述音频信号的时间的第一音频信号部分之后的部分; 配置用于分析所述音频信号和用于确定性采矿的控制器，其中音频信号的部分是在音频信号的频域和哪部分编码的第一音频信号部分是在时域编码的第二音频信号部分; 和编码的信号为前编码的音频信号的形成，其包括用于所述第一音频信号部分中的第一编码信号部分和用于所述第二音频信号的部分的第二部分编码信号。

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