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1. 发明授权

US11521628B2 Apparatus and method for encoding an audio signal using compensation values between three spectral bands 有权
公开(公告)号：US11521628B2
公开(公告)日：2022-12-06
申请号：US16283668
申请日：2019-02-22
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Sascha Disch , Franz Reutelhuber , Jan Buethe , Markus Multrus , Bernd Edler
IPC分类号： G10L19/04 , G10L19/008 , G10L19/16 , G10L19/02 , G10L21/038 , G10L21/0232 , H04L65/60
摘要： An apparatus for encoding an audio signal includes: a core encoder for core encoding first audio data in a first spectral band; a parametric coder for parametrically coding second audio data in a second spectral band being different from the first spectral band, wherein the parametric coder includes: an analyzer for analyzing first audio data in the first spectral band to obtain a first analysis result and for analyzing second audio data in the second spectral band to obtain a second analysis result; a compensator for calculating a compensation value using the first analysis result and the second analysis result; and a parameter calculated for calculating a parameter from the second audio data in the second spectral band using the compensation value.

2. 发明授权

US11049506B2 Apparatus and method for encoding and decoding an encoded audio signal using temporal noise/patch shaping 有权
公开(公告)号：US11049506B2
公开(公告)日：2021-06-29
申请号：US16417471
申请日：2019-05-20
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Sascha Disch , Frederik Nagel , Ralf Geiger , Balaji Nagendran Thoshkahna , Konstantin Schmidt , Stefan Bayer , Christian Neukam , Bernd Edler , Christian Helmrich
IPC分类号： G10L19/008 , G10L21/0388 , G10L19/025 , G10L19/03 , G10L19/02 , G10L19/022 , G10L19/032 , G10L19/06 , G10L25/06 , H04S1/00
摘要： An apparatus for decoding an encoded audio signal, includes: a spectral domain audio decoder for generating a first decoded representation of a first set of first spectral portions being spectral prediction residual values; a frequency regenerator for generating a reconstructed second spectral portion using a first spectral portion of the first set of first spectral portions, wherein the reconstructed second spectral portion additionally includes spectral prediction residual values; and an inverse prediction filter for performing an inverse prediction over frequency using the spectral residual values for the first set of first spectral portions and the reconstructed second spectral portion using prediction filter information included in the encoded audio signal.

3. 发明授权

US10818304B2 Phase coherence control for harmonic signals in perceptual audio codecs 有权
公开(公告)号：US10818304B2
公开(公告)日：2020-10-27
申请号：US14470551
申请日：2014-08-27
申请人： Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
发明人： Sascha Disch , Juergen Herre , Bernd Edler , Frederik Nagel
IPC分类号： G10L19/00 , G10L21/00 , G10L19/02 , G10L19/26
摘要： A decoder for decoding an encoded audio signal to obtain a phase-adjusted audio signal is provided. The decoder has a decoding unit and a phase adjustment unit. The decoding unit is adapted to decode the encoded audio signal to obtain a decoded audio signal. The phase adjustment unit is adapted to adjust the decoded audio signal to obtain the phase-adjusted audio signal. The phase adjustment unit is configured to receive control information depending on a vertical phase coherence of the encoded audio signal. Moreover, the phase adjustment unit is adapted to adjust the decoded audio signal based on the control information.

4. 发明授权

US10573334B2 Apparatus and method for encoding or decoding an audio signal with intelligent gap filling in the spectral domain 有权
公开(公告)号：US10573334B2
公开(公告)日：2020-02-25
申请号：US15002370
申请日：2016-01-20
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Sascha Disch , Frederik Nagel , Ralf Geiger , Balaji Nagendran Thoshkahna , Konstantin Schmidt , Stefan Bayer , Christian Neukam , Bernd Edler , Christian Helmrich
IPC分类号： G10L19/00 , G10L21/0388 , G10L19/008 , G10L19/025 , G10L19/03 , G10L19/02 , G10L19/022 , G10L19/032 , G10L19/06 , G10L25/06 , H04S1/00
摘要： An apparatus for decoding an encoded audio signal, includes a spectral domain audio decoder for generating a first decoded representation of a first set of first spectral portions, the decoded representation having a first spectral resolution; a parametric decoder for generating a second decoded representation of a second set of second spectral portions having a second spectral resolution being lower than the first spectral resolution; a frequency regenerator for regenerating every constructed second spectral portion having the first spectral resolution using a first spectral portion and spectral envelope information for the second spectral portion; and a spectrum time converter for converting the first decoded representation and the reconstructed second spectral portion into a time representation.

5. 发明授权

US10354662B2 Apparatus and method for generating an encoded signal or for decoding an encoded audio signal using a multi overlap portion 有权
公开(公告)号：US10354662B2
公开(公告)日：2019-07-16
申请号：US14830453
申请日：2015-08-19
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Christian Helmrich , Jeremie Lecomte , Goran Markovic , Markus Schnell , Bernd Edler , Stefan Reuschl
IPC分类号： G10L19/00 , G10L19/025 , H04N19/172 , H04N19/176 , H04N19/44 , G10L19/022 , G10L19/02
摘要： An apparatus for generating an encoded signal includes: a window sequence controller for generating a window sequence information for windowing an audio or image signal, the window sequence information indicating a first window for generating a first frame of spectral values, a second window function and at least one third window function for generating a second frame of spectral values, wherein the first window function, the second window function and the one or more third window functions overlap within a multi-overlap region; a preprocessor for windowing a second block of samples corresponding to the second window function and the at least one third window functions using an auxiliary window function to acquire a second block of windowed samples, a spectrum converter for applying an aliasing-introducing transform; and a processor for processing the first frame and the second frame to acquire encoded frames of the audio or image signal.

6. 发明授权

US09734833B2 Encoder, decoder and methods for backward compatible dynamic adaption of time/frequency resolution spatial-audio-object-coding 有权
公开(公告)号：US09734833B2
公开(公告)日：2017-08-15
申请号：US14678667
申请日：2015-04-03
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Sascha Disch , Jouni Paulus , Bernd Edler , Oliver Hellmuth , Juergen Herre , Thorsten Kastner
IPC分类号： H04R5/00 , G10L19/008 , G10L19/025 , G10L19/02 , G10L19/20
CPC分类号： G10L19/008 , G10L19/02 , G10L19/0204 , G10L19/025 , G10L19/20
摘要： A decoder for generating an audio output signal having one or more audio output channels from a downmix signal having a plurality of time-domain downmix samples is provided. The downmix signal encodes two or more audio object signals. The decoder has a window-sequence generator for determining a plurality of analysis windows, each having a plurality of time-domain downmix samples of the downmix signal and a window length indicating the number of the time-domain downmix samples. Moreover, the decoder has a t/f-analysis module for transforming the plurality of time-domain downmix samples of each analysis window from a time-domain to a time-frequency domain depending on the window length of said analysis window, to obtain a transformed downmix. Furthermore, the decoder has an un-mixing unit for un-mixing the transformed downmix based on parametric side information on the two or more audio object signals to obtain the audio output signal. Moreover, an encoder is provided.

7. 发明授权

US09646632B2 Time warp activation signal provider, audio signal encoder, method for providing a time warp activation signal, method for encoding an audio signal and computer programs 有权
公开(公告)号：US09646632B2
公开(公告)日：2017-05-09
申请号：US14538756
申请日：2014-11-11
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Stefan Bayer , Sascha Disch , Ralf Geiger , Guillaume Fuchs , Max Neuendorf , Gerald Schuller , Bernd Edler
IPC分类号： G10L19/00 , G10L21/04 , G10L19/002 , G10L19/028 , G10L19/022 , G10L19/032 , G10L21/043 , G10L25/90 , G10L19/26
CPC分类号： G10L21/04 , G10L19/002 , G10L19/0212 , G10L19/022 , G10L19/028 , G10L19/032 , G10L19/265 , G10L21/043 , G10L25/90
摘要： An audio encoder has a window function controller, a windower, a time warper with a final quality check functionality, a time/frequency converter, a TNS stage or a quantizer encoder, the window function controller, the time warper, the TNS stage or an additional noise filling analyzer are controlled by signal analysis results obtained by a time warp analyzer or a signal classifier. Furthermore, a decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.

8. 发明授权

US09570085B2 Apparatus and method for efficient synthesis of sinusoids and sweeps by employing spectral patterns 有权
标题翻译：通过采用光谱模式有效地合成正弦波和扫描的装置和方法
公开(公告)号：US09570085B2
公开(公告)日：2017-02-14
申请号：US14682015
申请日：2015-04-08
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Sascha Disch , Benjamin Schubert , Ralf Geiger , Bernd Edler , Martin Dietz
IPC分类号： G10L19/02 , G10L19/032
CPC分类号： G10L19/02 , G10L19/0212 , G10L19/032
摘要： An apparatus for generating an audio output signal based on an encoded audio signal spectrum is provided. The apparatus has a processing unit for processing the encoded audio signal spectrum to obtain a decoded audio signal spectrum having a plurality of spectral coefficients, wherein each of the spectral coefficients has a spectral location within the encoded audio signal spectrum and a spectral value. Moreover, the apparatus has a pseudo coefficients determiner for determining one or more pseudo coefficients. Furthermore, the apparatus has a replacement unit for replacing at least one or more pseudo coefficients by a determined spectral pattern to obtain a modified audio signal spectrum, wherein each of at least two pattern coefficients has a spectral value. Moreover, the apparatus has a spectrum-time-conversion unit for converting the modified audio signal spectrum to a time-domain.
摘要翻译：提供了一种用于基于经编码的音频信号频谱产生音频输出信号的装置。该装置具有用于处理编码音频信号频谱以获得具有多个频谱系数的解码音频信号频谱的处理单元，其中每个频谱系数具有编码音频信号频谱内的频谱位置和频谱值。此外，该装置具有用于确定一个或多个伪系数的伪系数确定器。此外，该设备具有替换单元，用于通过确定的频谱图案来替换至少一个或多个伪系数，以获得修改的音频信号频谱，其中至少两个模式系数中的每一个具有频谱值。此外，该装置具有用于将修改的音频信号频谱转换为时域的频谱 - 时间转换单元。

9. 发明授权

US09398294B2 Audio or video encoder, audio or video decoder and related methods for processing multi-channel audio or video signals using a variable prediction direction 有权
标题翻译：音频或视频编码器，音频或视频解码器以及使用可变预测方向处理多声道音频或视频信号的相关方法
公开(公告)号：US09398294B2
公开(公告)日：2016-07-19
申请号：US13645707
申请日：2012-10-05
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Julien Robillard , Matthias Neusinger , Christian Helmrich , Johannes Hilpert , Nikolaus Rettelbach , Sascha Disch , Bernd Edler
IPC分类号： H04N19/50 , G10L19/008 , G10L19/06 , G06F17/00 , G10L19/00 , G10L21/00
CPC分类号： H04N19/50 , G10L19/008 , G10L19/06
摘要： An encoder/decoder is based on a combination of two audio or video channels to obtain a first combination signal as a mid-signal and a residual signal derivable using a predicted side signal derived from the mid-signal. A decoder uses the prediction residual signal, the first combination signal, a prediction direction indicator and prediction information to derive decoded first channel and second channel signals. A real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. The prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.
摘要翻译：编码器/解码器基于两个音频或视频信道的组合，以获得作为中间信号的第一组合信号和使用从中间信号导出的预测侧信号可导出的残差信号。解码器使用预测残差信号，第一组合信号，预测方向指示符和预测信息来导出解码的第一信道和第二信道信号。可以将实到虚变换应用于估计第一组合信号的频谱的虚部。在推测预测残差信号中使用的预测信号，实值第一组合信号乘以复数预测信息的实部，并将第一组合信号的估计虚部乘以复数的虚部预测信息。

10. 发明授权

US09293149B2 Time warp activation signal provider, audio signal encoder, method for providing a time warp activation signal, method for encoding an audio signal and computer programs 有权
公开(公告)号：US09293149B2
公开(公告)日：2016-03-22
申请号：US14538748
申请日：2014-11-11
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Stefan Bayer , Sascha Disch , Ralf Geiger , Guillaume Fuchs , Max Neuendorf , Gerald Schuller , Bernd Edler
IPC分类号： G10L15/00 , G10L21/00 , G10L21/02 , G10L21/04 , G10L19/002 , G10L19/028 , G10L19/022 , G10L19/032 , G10L21/043 , G10L25/90 , G10L19/26
CPC分类号： G10L21/04 , G10L19/002 , G10L19/0212 , G10L19/022 , G10L19/028 , G10L19/032 , G10L19/265 , G10L21/043 , G10L25/90
摘要： An audio encoder has a window function controller, a windower, a time warper with a final quality check functionality, a time/frequency converter, a TNS stage or a quantizer encoder, the window function controller, the time warper, the TNS stage or an additional noise filling analyzer are controlled by signal analysis results obtained by a time warp analyzer or a signal classifier. Furthermore, a decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.

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