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1. 发明申请

WO2019091904A1 APPARATUS AND METHOD FOR ENCODING AND DECODING AN AUDIO SIGNAL USING DOWNSAMPLING OR INTERPOLATION OF SCALE PARAMETERS 审中-公开
公开(公告)号：WO2019091904A1
公开(公告)日：2019-05-16
申请号：PCT/EP2018/080137
申请日：2018-11-05
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： RAVELLI, Emmanuel , SCHNELL, Markus , BENNDORF, Conrad , LUTZKY, Manfred , DIETZ, Martin
IPC分类号： G10L19/02 , G10L19/038 , G10L19/002
摘要： An apparatus for encoding an audio signal (160), comprises: a converter (100) for converting the audio signal into a spectral representation; a scale parameter calculator (110) for calculating a first set of scale parameters from the spectral representation: a downsampler (130) for downsampling the first set of scale parameters to obtain a second set of scale parameters, wherein a second number of scale parameters in the second set of scale parameters is lower than a first number of scale parameters in the first set of scale parameters; a scale parameter encoder (140) for generating an encoded representation of the second set of scale parameters; a spectral processor (120) for processing the spectral representation using a third set of scale parameters, the third set of scale parameters having a third number of scale parameters being greater than the second number of scale parameters, wherein the spectral processor (120) is configured to use the first set of scale parameters or to derive the third set of scale parameters from the second set of scale parameters or from the encoded representation of the second set of scale parameters using an interpolation operation; and an output interface (150) for generating an encoded output signal (170) comprising information on the encoded representation of the spectral representation and information on the encoded representation of the second set of scale parameters.

2. 发明申请

WO2019091573A1 APPARATUS AND METHOD FOR ENCODING AND DECODING AN AUDIO SIGNAL USING DOWNSAMPLING OR INTERPOLATION OF SCALE PARAMETERS 审中-公开
公开(公告)号：WO2019091573A1
公开(公告)日：2019-05-16
申请号：PCT/EP2017/078921
申请日：2017-11-10
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： RAVELLI, Emmanuel , SCHNELL, Markus , BENNDORF, Conrad , LUTZKY, Manfred , DIETZ, Martin
IPC分类号： G10L19/02 , G10L19/038 , G10L19/002
摘要： An apparatus for encoding an audio signal (160), comprises: a converter (100) for converting the audio signal into a spectral representation; a scale parameter calculator (110) for calculating a first set of scale parameters from the spectral representation: a downsampler (130) for downsampling the first set of scale parameters to obtain a second set of scale parameters, wherein a second number of scale parameters in the second set of scale parameters is lower than a first number of scale parameters in the first set of scale parameters; a scale parameter encoder (140) for generating an encoded representation of the second set of scale parameters; a spectral processor (120) for processing the spectral representation using a third set of scale parameters, the third set of scale parameters having a third number of scale parameters being greater than the second number of scale parameters, wherein the spectral processor (120) is configured to use the first set of scale parameters or to derive the third set of scale parameters from the second set of scale parameters or from the encoded representation of the second set of scale parameters using an interpolation operation; and an output interface (150) for generating an encoded output signal (170) comprising information on the encoded representation of the spectral representation and information on the encoded representation of the second set of scale parameters.

3. 发明申请

WO2015071173A1 ENCODER FOR ENCODING AN AUDIO SIGNAL, AUDIO TRANSMISSION SYSTEM AND METHOD FOR DETERMINING CORRECTION VALUES 审中-公开
标题翻译：编码音频信号的编码器，音频传输系统和确定校正值的方法
公开(公告)号：WO2015071173A1
公开(公告)日：2015-05-21
申请号：PCT/EP2014/073960
申请日：2014-11-06
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： SCHMIDT, Konstantin , FUCHS, Guillaume , NEUSINGER, Matthias , DIETZ, Martin
IPC分类号： G10L19/038
CPC分类号： G10L19/167 , G10L19/038 , G10L19/06
摘要： An encoder for encoding an audio signal comprises an analyzer configured for analyzing the audio signal and for determining analysis prediction coefficients from the audio signal. The encoder further comprises a converter configured for deriving converted prediction coefficients from the analysis prediction coefficients, a memory configured for storing a multitude of correction values and a calculator. The calculator comprises a processor configured for processing the converted prediction coefficients to obtain spectral weighting factors. The calculator further comprises a combiner configured for combining the spectral weighting factors and the multitude of correction values to obtain corrected weighting factors. A quantizer of the calculator is configured for quantizing the converted prediction coefficients using the corrected weighting factors to obtain a quantized representation of the converted prediction coefficients. The encoder comprises a bitstream former configured for forming an output signal based on the quantized representation of the converted prediction coefficients and based on the audio signal.
摘要翻译：用于对音频信号进行编码的编码器包括：分析器，被配置用于分析音频信号并用于从音频信号确定分析预测系数。编码器还包括被配置为从分析预测系数导出转换的预测系数的转换器，被配置为存储多个校正值的存储器和计算器。该计算器包括处理器，该处理器被配置用于处理转换的预测系数以获得光谱加权因子。计算器还包括组合器，其被配置为组合频谱加权因子和多个校正值以获得校正的加权因子。计算器的量化器被配置为使用校正的加权因子对转换的预测系数进行量化，以获得经转换的预测系数的量化表示。编码器包括被配置为基于经转换的预测系数的量化表示并基于音频信号形成输出信号的比特流形成器。

4. 发明申请

WO2012110482A2 NOISE GENERATION IN AUDIO CODECS 审中-公开
标题翻译：音频编解码器中的噪声产生
公开(公告)号：WO2012110482A2
公开(公告)日：2012-08-23
申请号：PCT/EP2012/052464
申请日：2012-02-14
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , SETIAWAN, Panji , WILDE, Stephan , LOMBARD, Anthony , DIETZ, Martin
发明人： SETIAWAN, Panji , WILDE, Stephan , LOMBARD, Anthony , DIETZ, Martin
IPC分类号： G10L19/00
CPC分类号： G10L19/00 , G10K11/16 , G10L19/005 , G10L19/012 , G10L19/0212 , G10L19/025 , G10L19/03 , G10L19/04 , G10L19/107 , G10L19/12 , G10L19/22 , G10L19/26 , G10L21/0216 , G10L25/06 , G10L25/78
摘要： The spectral domain is efficiently used in order to parameterize the background noise thereby yielding a background noise synthesis which is more realistic and thus leads to a more transparent active to inactive phase switching.
摘要翻译：谱域被有效地用于参数化背景噪声，从而产生更现实的背景噪声合成，从而导致更加透明的主动到非主动的相位切换。

5. 发明申请

WO2020165265A1 DECODER AND DECODING METHOD FOR LC3 CONCEALMENT INCLUDING FULL FRAME LOSS CONCEALMENT AND PARTIAL FRAME LOSS CONCEALMENT 审中-公开
公开(公告)号：WO2020165265A1
公开(公告)日：2020-08-20
申请号：PCT/EP2020/053620
申请日：2020-02-12
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： TOMASEK, Adrian , SPERSCHNEIDER, Ralph , BÜTHE, Jan , BENNDORF, Conrad , DIETZ, Martin , SCHNELL, Markus , SCHLEGEL, Maximilian
IPC分类号： G10L19/005 , H04L1/00 , G10L19/02
摘要： Fig. 1 illustrates a decoder (100) for decoding a current frame to reconstruct an audio signal according to an embodiment. The audio signal is encoded within the current frame. The current frame comprises a current bitstream payload. The current bitstream payload comprises a plurality of payload bits. The plurality of payload bits encodes a plurality of spectral lines of a spectrum of the audio signal. Each of the payload bits exhibits a position within the current bitstream payload. The decoder (100) comprises a decoding module (110) and an output interface (120). The decoding module (110) is configured to reconstruct the audio signal. The output interface (120) is configured to output the audio signal. The decoding module (110) comprises an error concealment mode, wherein, if the decoding module (110) is in said error concealment mode, the decoding module (110) is configured to reconstruct the audio signal by conducting error concealment for those spectral lines of the spectrum of the audio signal, which exhibit a frequency being greater than a threshold frequency. And/or, if error concealment is conducted by the decoding module (110), the decoding module (110) is configured to conduct error concealment in a way that depends on whether or not a previous bitstream payload of a previous frame preceding the current frame encodes a signal component of the audio signal which is tonal or harmonic.

6. 发明申请

WO2017125563A1 APPARATUS AND METHOD FOR ESTIMATING AN INTER-CHANNEL TIME DIFFERENCE 审中-公开
标题翻译：用于估计信道间时间差的装置和方法
公开(公告)号：WO2017125563A1
公开(公告)日：2017-07-27
申请号：PCT/EP2017/051214
申请日：2017-01-20
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： BAYER, Stefan , FOTOPOULOU, Eleni , MULTRUS, Markus , FUCHS, Guillaume , RAVELLI, Emmanuel , SCHNELL, Markus , DÖHLA, Stefan , JÄGERS, Wolfgang , DIETZ, Martin , MARKOVIC, Goran
IPC分类号： G10L19/008 , G10L19/02
CPC分类号： G10L19/008 , G10L19/02 , G10L19/022 , G10L19/04 , H04S2420/03
摘要： An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, comprises: a calculator (1020) for calculating a cross- correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a spectral characteristic estimator (1010) for estimating a characteristic of a spectrum of the first channel signal or the second channel signal for the time block; a smoothing filter (1030) for smoothing the cross-correlation spectrum over time using the spectral characteristic to obtain a smoothed cross- correlation spectrum; and a processor (1040) for processing the smoothed cross- correlation spectrum to obtain the inter-channel time difference.
摘要翻译：一种用于估计第一信道信号和第二信道信号之间的信道间时间差的装置，包括：计算器（1020），用于计算来自第一信道信号和第二信道信号的时间块的互相关谱时间块中的信道信号和时间块中的第二信道信号; 谱特性估计器（1010），用于估计所述时间块的所述第一信道信号或所述第二信道信号的谱的特性; 平滑滤波器（1030），用于使用所述频谱特性随时间平滑所述互相关频谱以获得经平滑的互相关频谱; 和用于处理平滑的互相关频谱以获得信道间时间差的处理器（1040）。

7. 发明申请

WO2017125562A1 APPARATUSES AND METHODS FOR ENCODING OR DECODING A MULTI-CHANNEL AUDIO SIGNAL USING FRAME CONTROL SYNCHRONIZATION 审中-公开
标题翻译：使用帧控制同步对多通道音频信号进行编码或解码的装置和方法
公开(公告)号：WO2017125562A1
公开(公告)日：2017-07-27
申请号：PCT/EP2017/051212
申请日：2017-01-20
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： FUCHS, Guillaume , RAVELLI, Emmanuel , MULTRUS, Markus , SCHNELL, Markus , DÖHLA, Stefan , DIETZ, Martin , MARKOVIC, Goran , FOTOPOULOU, Eleni , BAYER, Stefan , JÄGERS, Wolfgang
IPC分类号： G10L19/022 , G10L19/008
CPC分类号： G10L19/008 , G10L19/02 , G10L19/022 , G10L19/04 , H04S2420/03
摘要： Encoding a multi-channel audio signal using a time-spectral converter for converting sequences of blocks of sampling values into sequences of blocks of spectral values; a multi-channel processor for applying a joint multi-channel processing to blocks of spectral values to obtain at least one result sequence of blocks; a spectral-time converter for converting the result sequence of blocks of spectral values into a time domain representation comprising an output sequence of blocks of sampling values; and a core encoder for encoding the output sequence of blocks of sampling values to obtain an encoded multi-channel signal, wherein the core encoder operates with a first frame control, and wherein the time-spectral converter or the spectral-time converter operate with a second frame control being synchronized to the first frame control, wherein the start or end frame border is in a predetermined relation to a start or end instant of an overlapping portion of a window used by the time-spectral converter.
摘要翻译：使用时间频谱转换器编码多声道音频信号，用于将采样值块的序列转换为频谱值的块序列; 多信道处理器，用于对频谱值块应用联合多信道处理以获得块的至少一个结果序列; 频谱时间转换器，用于将频谱值块的结果序列转换为时域表示，该时域表示包括采样值块的输出序列; 以及核心编码器，用于对采样值的输出序列进行编码以获得编码的多声道信号，其中核心编码器以第一帧控制进行操作，并且其中时间谱转换器或频谱时间转换器以第二帧控制与第一帧控制同步，其中开始或结束帧边界与由时间 - 频谱转换器使用的窗口的重叠部分的开始或结束时刻成预定关系。

8. 发明申请

WO2017125559A1 APPARATUSES AND METHODS FOR ENCODING OR DECODING AN AUDIO MULTI-CHANNEL SIGNAL USING SPECTRAL-DOMAIN RESAMPLING 审中-公开
标题翻译：使用谱域重构对音频多通道信号进行编码或解码的设备和方法
公开(公告)号：WO2017125559A1
公开(公告)日：2017-07-27
申请号：PCT/EP2017/051208
申请日：2017-01-20
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： FUCHS, Guillaume , RAVELLI, Emmanuel , MULTRUS, Markus , SCHNELL, Markus , DÖHLA, Stefan , DIETZ, Martin , MARKOVIC, Goran , FOTOPOULOU, Eleni , BAYER, Stefan , JÄGERS, Wolfgang
IPC分类号： G10L19/008 , G10L19/02
CPC分类号： G10L19/008 , G10L19/02 , G10L19/022 , G10L19/04 , H04S2420/03
摘要： An apparatus converting sequences of blocks of sample values of at least two channels into sequences of blocks of spectral values, wherein a block of sampling values has an input sampling rate, a multi-channel processor (1010) for applying a joint multi-channel processing to the sequences of blocks or to resampled sequences of blocks to obtain at least one result sequence of blocks of spectral values; a spectral domain resampler (1020) for resampling the blocks of the result sequences or for resampling the sequences of blocks of spectral values to obtain a resampled sequence of blocks of spectral values, wherein a block of the resampled sequence of blocks has spectral values up to a maximum output frequency (1231, 1221) being different from the maximum input frequency (1211); a spectral-time converter for converting the resampled sequence of blocks or the result sequence of blocks into a time domain; and a core encoder (1040) for encoding the output sequence of blocks.
摘要翻译：一种将至少两个信道的采样值的块的序列转换成频谱值的块的序列的设备，其中采样值块具有输入采样率，多信道处理器（1010）用于将联合多信道处理应用于块序列或块重采样序列以获得频谱值块的至少一个结果序列; 频谱域重采样器（1020），用于重新采样结果序列的块或用于重新采样频谱值的块的序列以获得频谱值的块的重采样序列，其中重新采样的块序列的块具有高达最大输出频率（1231,1221）与最大输入频率（1211）不同; 频谱时间转换器，用于将重新采样的块的序列或块的结果序列转换为时域; 和用于编码块的输出序列的核心编码器（1040）。

9. 发明申请

WO2016016124A1 AUDIO ENCODER AND DECODER USING A FREQUENCY DOMAIN PROCESSOR, A TIME DOMAIN PROCESSOR, AND A CROSS PROCESSOR FOR CONTINUOUS INITIALIZATION 审中-公开
标题翻译：音频编码器和解码器使用频域处理器，时域处理器和连续初始化的交叉处理器
公开(公告)号：WO2016016124A1
公开(公告)日：2016-02-04
申请号：PCT/EP2015/067005
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
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：一种用于编码音频信号的音频编码器，包括：用于对频域中的第一音频信号部分进行编码的第一编码处理器（600），其中第一编码处理器（600）包括：时间频率转换器，用于将第一音频信号部分转换成具有高达第一音频信号部分的最大频率的频谱线的频域表示; 用于对频域表示进行编码的频谱编码器; 第二编码处理器，用于对时域中的第二不同音频信号部分进行编码; 用于从所述第一音频信号部分的经编码的频谱表示计算所述第二编码处理器（610）的初始化数据的交叉处理器（700），使得所述第二编码处理（610）被初始化以对所述第二音频信号在音频信号中紧接在第一音频信号部分之后的部分; 控制器，被配置为分析音频信号并确定音频信号的哪个部分是在频域中编码的第一音频信号部分，并且音频信号的哪个部分是在时域中编码的第二音频信号部分; 以及用于形成编码音频信号的编码信号形成器，包括用于第一音频信号部分的第一编码信号部分和用于第二音频信号部分的第二编码信号部分。

10. 发明申请

WO2014202539A1 APPARATUS AND METHOD FOR IMPROVED CONCEALMENT OF THE ADAPTIVE CODEBOOK IN ACELP-LIKE CONCEALMENT EMPLOYING IMPROVED PITCH LAG ESTIMATION 审中-公开
标题翻译：用于改进自适应代码的ACARP类似设计的方法和方法，用于改进PITCH LAG估计
公开(公告)号：WO2014202539A1
公开(公告)日：2014-12-24
申请号：PCT/EP2014/062589
申请日：2014-06-16
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： LECOMTE, Jérémie , SCHNABEL, Michael , MARKOVIC, Goran , DIETZ, Martin , NEUGEBAUER, Bernhard
IPC分类号： G10L19/005 , G10L25/90 , G10L19/107 , G10L19/08
CPC分类号： G10L19/005 , G10L19/08 , G10L19/107 , G10L19/125 , G10L25/90 , G10L2019/0002 , G10L2019/0003 , G10L2019/0008
摘要： An apparatus for determining an estimated pitch lag is provided. The apparatus comprises an input interface (1 10) for receiving a plurality of original pitch lag values, and a pitch lag estimator (120) for estimating the estimated pitch lag. The pitch lag estimator (120) is configured to estimate the estimated pitch lag depending on a plurality of original pitch lag values and depending on a plurality of information values, wherein for each original pitch lag value of the plurality of original pitch lag values, an information value of the plurality of information values is assigned to said original pitch lag value.
摘要翻译：提供了一种用于确定估计音调滞后的装置。该装置包括用于接收多个原始音调滞后值的输入接口（110）和用于估计估计音调滞后的音调滞后估计器（120）。音调滞后估计器（120）被配置为根据多个原始音调滞后值并根据多个信息值来估计估计音调滞后，其中对于多个原始音调滞后值的每个原始音调滞后值，将多个信息值的信息值分配给所述原始音调滞后值。

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