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1. 发明授权

EP4191581B1 FREQUENCY-DOMAIN AUDIO CODING SUPPORTING TRANSFORM LENGTH SWITCHING 有权
公开(公告)号：EP4191581B1
公开(公告)日：2024-03-27
申请号：EP23150061.2
申请日：2014-07-15
发明人： Dick, Sascha , Helmrich, Christian , Hölzer, Andreas
IPC分类号： G10L19/022 , G10L19/03 , G10L19/008 , G10L19/028

2. 发明公开

EP4336497A3 MULTISIGNAL ENCODER, MULTISIGNAL DECODER, AND RELATED METHODS USING SIGNAL WHITENING OR SIGNAL POST PROCESSING 审中-实审
公开(公告)号：EP4336497A3
公开(公告)日：2024-03-20
申请号：EP24153258.9
申请日：2019-06-27
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： FOTOPOULOU, Eleni , MULTRUS, Markus , DICK, Sascha , MARKOVIC, Goran , MABEN, Pallavi , KORSE, Srikanth , BAYER, Stefan , DISCH, Sascha , HERRE, Jürgen
IPC分类号： G10L19/008 , G10L19/03
摘要： A multisignal encoder for encoding at least three audio signals, comprises: a signal preprocessor (100) for individually preprocessing each audio signal to obtain at least three preprocessed audio signals, wherein the preprocessing is performed so that a preprocessed audio signal is whitened with respect to the signal before preprocessing; an adaptive joint signal processor (200) for performing a processing of the at least three preprocessed audio signals to obtain at least three jointly processed signals or at least two jointly processed signals and an unprocessed signal; a signal encoder (300) for encoding each signal to obtain one or more encoded signals; and an output interface (400) for transmitting or storing an encoded multisignal audio signal comprising the one or more encoded signals, side information relating to the preprocessing and side information relating to the processing.

3. 发明公开

EP3848929A1 DEVICE AND METHOD FOR REDUCING QUANTIZATION NOISE IN A TIME-DOMAIN DECODER 有权
公开(公告)号：EP3848929A1
公开(公告)日：2021-07-14
申请号：EP21160367.5
申请日：2014-01-09
申请人： VoiceAge EVS LLC , VoiceAge EVS GmbH & Co. KG
发明人： VAILLANCOURT, Tommy , JELINEK, Milan
IPC分类号： G10L19/03 , G10L21/0232 , G10L19/12 , G10L19/26 , G10L21/0208 , G10L25/78 , G10L25/93 , G10L25/21
摘要： The present disclosure relates to a device and method for reducing quantization noise in a signal contained in a time-domain excitation decoded by a time-domain decoder. The decoded time-domain excitation is converted into a frequency-domain excitation. A weighting mask is produced for retrieving spectral information lost in the quantization noise. The frequency-domain excitation is modified to increase spectral dynamics by application of the weighting mask. The modified frequency-domain excitation is converted into a modified time-domain excitation. The method and device can be used for improving music content rendering of linear-prediction (LP) based codecs. Optionally, a synthesis of the decoded time-domain excitation may be classified into one of a first set of excitation categories and a second set of excitation categories, the second set including INACTIVE or UNVOICED categories, the first set including an OTHER category.

5. 发明授权

EP3471092B1 DECODING OF PULSE POSITIONS OF TRACKS OF AN AUDIO SIGNAL 有权转让
公开(公告)号：EP3471092B1
公开(公告)日：2020-07-08
申请号：EP18209670.1
申请日：2012-02-10
申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.
发明人： Bäckström, Tom , Fuchs, Guillaume
IPC分类号： G10L19/012 , G10L19/03 , G10L21/0216 , G10L25/78 , G10L19/22 , G10L19/02 , G10L19/025 , G10L19/107 , G10L19/04 , G10L19/26 , G10L25/06

6. 发明公开

EP3649640A1 LOW COMPLEXITY DENSE TRANSIENT EVENTS DETECTION AND CODING 审中-实审转让
公开(公告)号：EP3649640A1
公开(公告)日：2020-05-13
申请号：EP18733915.5
申请日：2018-07-03
申请人： Dolby International AB
发明人： BISWAS, Arijit , SCHUG, Michael , MUNDT, Harald
IPC分类号： G10L19/025 , G10L19/03

7. 发明公开

EP3483880A1 TEMPORAL NOISE SHAPING 审中-公开
公开(公告)号：EP3483880A1
公开(公告)日：2019-05-15
申请号：EP17201094.4
申请日：2017-11-10
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Friedrich-Alexander-Universität Erlangen-Nürnberg
发明人： RAVELLI, Emmanuel , LUTZKY, Manfred , SCHNELL, Markus , TSCHEKALINSKIJ, Alexander , MARKOVIC, Goran , GEYERSBERGER, Stefan
IPC分类号： G10L19/03
摘要： There are discussed methods and apparatus for performing temporal noise shaping. An apparatus may comprise a temporal noise shaping, TNS, tool (11) for performing linear prediction, LP, filtering (S33, S35, S36) on an information signal including a plurality of frames; and
a controller (12) configured to control the TNS tool (11) so that the TNS tool (11) performs LP filtering with:
a first filter (14a) whose impulse response has a higher energy (S36); and
a second filter (15a) whose impulse response has a lower energy (S35), wherein the second filter is not an identity filter,
wherein the controller (12) is configured to choose (S34) between filtering (S36) with the first filter (14a), and filtering (S35) with the second filter (15a) on the basis of a frame metrics.

8. 发明授权

EP3063761B1 AUDIO BANDWIDTH EXTENSION BY INSERTION OF TEMPORAL PRE-SHAPED NOISE IN FREQUENCY DOMAIN 有权
标题翻译：插入频率域中的时间预形成噪声的音频带宽扩展
公开(公告)号：EP3063761B1
公开(公告)日：2017-11-22
申请号：EP14792794.1
申请日：2014-10-30
申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V.
发明人： DISCH, Sascha , MULTRUS, Markus , SCHUBERT, Benjamin , SCHNELL, Markus
IPC分类号： G10L19/02 , G10L19/028 , G10L19/16 , G10L21/038 , G10L19/24 , G10L19/03
CPC分类号： G10L19/028 , G10L19/0212 , G10L19/03 , G10L19/167 , G10L19/24 , G10L21/038
摘要： An audio decoder device for decoding a bitstream includes a bitstream receiver configured to receive the bitstream and to derive an encoded audio signal from the bitstream; a core decoder module configured for deriving a decoded audio signal in a time domain from the encoded audio signal; a temporal envelope generator configured to determine a temporal envelope of the decoded audio signal; a bandwidth extension module configured to produce a frequency domain bandwidth extension signal; a time-to-frequency converter configured to transform the decoded audio signal into a frequency domain decoded audio signal; a combiner configured to combine the frequency domain decoded audio signal and the frequency domain bandwidth extension signal in order to produce a bandwidth extended frequency domain audio signal; and a frequency-to-time converter configured to transform the bandwidth extended frequency domain audio signal into a bandwidth-extended time domain audio signal.

9. 发明公开

EP3063761A1 AUDIO BANDWIDTH EXTENSION BY INSERTION OF TEMPORAL PRE-SHAPED NOISE IN FREQUENCY DOMAIN 有权
标题翻译：音频信号通过插入时间预成型的噪声信号频率范围内的带宽扩展
公开(公告)号：EP3063761A1
公开(公告)日：2016-09-07
申请号：EP14792794.1
申请日：2014-10-30
申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V.
发明人： DISCH, Sascha , MULTRUS, Markus , SCHUBERT, Benjamin , SCHNELL, Markus
IPC分类号： G10L19/03 , G10L19/24
CPC分类号： G10L19/028 , G10L19/0212 , G10L19/03 , G10L19/167 , G10L19/24 , G10L21/038
摘要： An audio decoder device for decoding a bitstream includes a bitstream receiver configured to receive the bitstream and to derive an encoded audio signal from the bitstream; a core decoder module configured for deriving a decoded audio signal in a time domain from the encoded audio signal; a temporal envelope generator configured to determine a temporal envelope of the decoded audio signal; a bandwidth extension module configured to produce a frequency domain bandwidth extension signal; a time-to-frequency converter configured to transform the decoded audio signal into a frequency domain decoded audio signal; a combiner configured to combine the frequency domain decoded audio signal and the frequency domain bandwidth extension signal in order to produce a bandwidth extended frequency domain audio signal; and a frequency-to-time converter configured to transform the bandwidth extended frequency domain audio signal into a bandwidth-extended time domain audio signal.
摘要翻译：用于位流进行解码的音频解码器设备包括配置成接收所述位流，并推导对从比特流编码的音频信号的比特流接收器; 配置用于获得从编码的音频信号时域中的解码音频信号的核心解码器模块; 配置为确定性矿解码的音频信号的时间包络的时间包络产生器; 配置以产生频域带宽扩展信号带宽扩展模块; 配置成将所述解码的音频信号变换为频域的时间 - 频率转换器解码的音频信号的装置; 被配置为在频域的组合器解码的音频信号，并且在为了产生带宽扩展频域音频信号的频域带宽扩展信号的装置; 和频率 - 时间转换器配置成将所述带宽扩展频域音频信号变换成一个带宽扩展时域音频信号。

10. 发明公开

EP3008725A1 APPARATUS AND METHOD FOR AUDIO SIGNAL ENVELOPE ENCODING, PROCESSING AND DECODING BY SPLITTING THE AUDIO SIGNAL ENVELOPE EMPLOYING DISTRIBUTION QUANTIZATION AND CODING 有权
标题翻译：用于音频信号包络编码，处理和解码的装置和方法，通过分配量化和编码来分离音频信号包络
公开(公告)号：EP3008725A1
公开(公告)日：2016-04-20
申请号：EP14728995.3
申请日：2014-06-10
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： BÄCKSTRÖM, Tom , SCHUBERT, Benjamin , MULTRUS, Markus , DISCH, Sascha , SCHMIDT, Konstantin , PIETRZYK, Grzegorz
IPC分类号： G10L19/06 , G10L19/032 , G10L19/03
CPC分类号： G10L19/06 , G10L19/03 , G10L19/032 , G10L2019/0016
摘要： An apparatus for decoding to obtain a reconstructed audio signal envelope includes a signal envelope reconstructor for generating the reconstructed audio signal envelope depending on one or more splitting points and an output interface for outputting the reconstructed audio signal envelope. The signal envelope reconstructor is configured to generate the reconstructed audio signal envelope such that the one or more splitting points divide the reconstructed audio signal envelope into two or more audio signal envelope portions, and to generate the reconstructed audio signal envelope such that, for each of the two or more signal envelope portions, an absolute value of its signal envelope portion value is greater than half of an absolute value of the signal envelope portion value of each of the other signal envelope portions.
摘要翻译：提供了一种用于解码以获得重建的音频信号包络的装置。该设备包括信号包络重构器（110），用于根据一个或多个分裂点产生重建的音频信号包络。此外，该设备包括用于输出重建的音频信号包络的输出接口（120）。信号包络重构器（110）被配置为生成重建的音频信号包络，使得一个或多个分裂点将重建的音频信号包络划分成两个或更多个音频信号包络部分。分配规则根据所述信号包络部分为两个或更多个信号包络部分的每个信号包络部分定义信号包络部分值。此外，信号包络重构器（110）被配置为生成重建的音频信号包络，使得对于两个或更多个信号包络部分中的每一个，其信号包络部分值的绝对值大于绝对值的一半其他每个信号包络部分的信号包络部分值。

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