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1. 发明申请

WO2020007719A1 MULTISIGNAL AUDIO CODING USING SIGNAL WHITENING AS PREPROCESSING 审中-公开
公开(公告)号：WO2020007719A1
公开(公告)日：2020-01-09
申请号：PCT/EP2019/067256
申请日：2019-06-27
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
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.

2. 发明申请

WO2015010934A1 AUDIO DECODER, AUDIO ENCODER, METHOD FOR PROVIDING AT LEAST FOUR AUDIO CHANNEL SIGNALS ON THE BASIS OF AN ENCODED REPRESENTATION, METHOD FOR PROVIDING AN ENCODED REPRESENTATION ON THE BASIS OF AT LEAST FOUR AUDIO CHANNEL SIGNALS AND COMPUTER PROGRAM USING A BANDWIDTH EXTENSION 审中-公开
标题翻译：音频解码器，音频编码器，基于编码表示的至少四个音频信道信号的提供方法，基于最小四个音频信道信号的编码表示方法和使用带宽扩展的计算机程序
公开(公告)号：WO2015010934A1
公开(公告)日：2015-01-29
申请号：PCT/EP2014/065021
申请日：2014-07-14
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： DICK, Sascha , ERTEL, Christian , HELMRICH, Christian , HILPERT, Johannes , HÖLZER, Andreas , KUNTZ, Achim
IPC分类号： G10L19/008 , G10L21/038
CPC分类号： G10L19/008 , G10L19/0017 , G10L21/038 , H04S3/008 , H04S7/30 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： An audio decoder for providing at least four bandwidth-extended channel signals on the basis of an encoded representation is configured to provide a first downmix signal and a second downmix signal on the basis of a jointly encoded representation of the first downmix signal and the second downmix signal using a multi-channel decoding. The audio decoder is configured to provide at least a first (third) audio channel signal and a second (fourth) audio channel signal on the basis of the first (second) downmix signal using a multi-channel decoding. The audio decoder is configured to perform a multi-channel bandwidth extension on the basis of the first (second) audio channel signal and the third (fourth) audio channel signal, to obtain a first (second) bandwidth-extended channel signal and a third (fourth) bandwidth-extended channel signal. An audio encoder uses a related concept.
摘要翻译：用于基于编码表示提供至少四个带宽扩展信道信号的音频解码器被配置为基于第一下混信号和第二降混信号的联合编码表示来提供第一下混合信号和第二下混信号信号采用多通道解码。音频解码器被配置为使用多声道解码来基于第一（第二）下混合信号来提供至少第一（第三）音频声道信号和第二（第四）音频声道信号。音频解码器被配置为基于第一（第二）音频信道信号和第三（第四）音频信道信号来执行多信道带宽扩展，以获得第一（第二）带宽扩展信道信号和第三（第四）带宽扩展通道信号。音频编码器使用相关概念。

3. 发明申请

WO2020084170A1 DIRECTIONAL LOUDNESS MAP BASED AUDIO PROCESSING 审中-公开
公开(公告)号：WO2020084170A1
公开(公告)日：2020-04-30
申请号：PCT/EP2019/079440
申请日：2019-10-28
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： HERRE, Jürgen , DELGADO, Pablo Manuel , DICK, Sascha
IPC分类号： G10L25/03 , G10L25/60 , G10L19/16 , G10L19/008
摘要： An audio analyzer configured to obtain spectral domain representations of two or more input audio signals. Additionally the audio analyzer is configured to obtain directional information associated with spectral bands of the spectral domain representations and to obtain loudness information associated with different directions as an analysis result. Contributions to the loudness information are determined in dependence on the directional information.

4. 发明申请

WO2019149337A1 APPARATUSES FOR CONVERTING AN OBJECT POSITION OF AN AUDIO OBJECT, AUDIO STREAM PROVIDER, AUDIO CONTENT PRODUCTION SYSTEM, AUDIO PLAYBACK APPARATUS, METHODS AND COMPUTER PROGRAMS 审中-公开
公开(公告)号：WO2019149337A1
公开(公告)日：2019-08-08
申请号：PCT/EP2018/025211
申请日：2018-08-08
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： WÜBBOLT, Oliver , KUNTZ, Achim , ERTEL, Christian , DICK, Sascha , NAGEL, Frederik , NEUSINGER, Matthias
IPC分类号： H04S3/00
摘要： An apparatus (100) for converting an object position of an audio object from a cartesian representation (110) to a spherical representation (112) is described. A basis area of the cartesian representation is subdivided into a plurality of basis area triangles (630,532,634,636), and wherein a plurality of spherical-domain triangles (660,662,664,666) are inscribed into a circle of a spherical representation. The apparatus is configured to determine, in which of the basis area triangles a projection (P) of the object position of the audio object into the base area is arranged; and the apparatus is configured to determine a mapped position (I) of the projection (P) of the object position using a linear transform (II), which maps the base area triangle onto its associated spherical domain triangle. The apparatus is configured to derive an azimuth angle (φ) and an intermediate radius value (IV) from the mapped position (I). The apparatus is configured to obtain a spherical domain radius value (V) and an elevation angle (III) in dependence on the intermediate radius value (VI) and in dependence on a distance (z) of the object position from the base area. An apparatus for converting an object position of an audio object from a spherical representation to a spherical representation, applications of these apparatuses, methods and computer programs are also described.

5. 发明申请

WO2016142375A1 APPARATUS AND METHOD FOR ENCODING OR DECODING A MULTI-CHANNEL SIGNAL 审中-公开
标题翻译：编码或解码多通道信号的装置和方法
公开(公告)号：WO2016142375A1
公开(公告)日：2016-09-15
申请号：PCT/EP2016/054900
申请日：2016-03-08
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： DICK, Sascha , SCHUH, Florian , RETTELBACH, Nikolaus , SCHWEGLER, Tobias , FÜG, Richard , HILPERT, Johannes , NEUSINGER, Matthias
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , G10L19/02 , H04S3/008 , H04S2400/01
摘要： Embodiments provide an apparatus for encoding a multi-channei signal having at least three channels. The apparatus comprises an iteration processor, a channel encoder and an output interface. The iteration processor is configured to calculate, in a first iteration step, inter-channel correlation values between each pair of the at least three channels, for selecting, in the first iteration step, a pair having a highest value or having a value above a threshold, and for processing the selected pair using a multi-channel processing operation to derive first multi-channel parameters for the selected pair and to derive first processed channels. Further, the iteration processor is configured to perform the calculating, the selecting and the processing in a second iteration step using at least one of the processed channels to derive second multi-channel parameters and second processed channels. The channel encoder is configured to encode channels resulting from an iteration processing performed by the iteration processor to obtain encoded channels. The output interface is configured to generate an encoded multi-channel signal having the encoded channels and the first and the second multi-channel parameters.
摘要翻译：实施例提供了一种用于对具有至少三个信道的多信道信号进行编码的装置。该装置包括迭代处理器，信道编码器和输出接口。迭代处理器被配置为在第一迭代步骤中计算每对至少三个信道之间的信道间相关值，用于在第一迭代步骤中选择具有最高值或具有高于并且使用多通道处理操作来处理所选择的对，以导出所选择的对的第一多通道参数并导出第一处理的通道。此外，迭代处理器被配置为使用至少一个处理的信道来执行在第二迭代步骤中的计算，选择和处理，以导出第二多信道参数和第二处理的信道。信道编码器被配置为对由迭代处理器执行的迭代处理产生的信道进行编码以获得编码信道。输出接口被配置为生成具有编码信道和第一和第二多信道参数的编码多信道信号。

6. 发明申请

WO2019149710A1 APPARATUSES FOR CONVERTING AN OBJECT POSITION OF AN AUDIO OBJECT, AUDIO STREAM PROVIDER, AUDIO CONTENT PRODUCTION SYSTEM, AUDIO PLAYBACK APPARATUS, METHODS AND COMPUTER PROGRAMS 审中-公开
公开(公告)号：WO2019149710A1
公开(公告)日：2019-08-08
申请号：PCT/EP2019/052156
申请日：2019-01-29
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： WÜBBOLT, Oliver , KUNTZ, Achim , ERTEL, Christian , DICK, Sascha , NAGEL, Frederik , NEUSINGER, Matthias
IPC分类号： H04S3/00
摘要： An apparatus (100) for converting an object position of an audio object from a cartesian representation (110) to a spherical representation (112) is described. A basis area of the cartesian representation is subdivided into a plurality of basis area triangles (630, 532, 634, 636), and wherein a plurality of spherical-domain triangles (660, 662, 664, 666) are inscribed into a circle of a spherical representation. The apparatus is configured to determine, in which of the basis area triangles a projection (P) of the object position of the audio object into the base area is arranged; and the apparatus is configured to determine a mapped position (formula (I)) of the projection (P) of the object position using a linear transform (formula (II)), which maps the base area triangle onto its associated spherical domain triangle. The apparatus is configured to derive an azimuth angle (φ) and an intermediate radius value (formula (III)) from the mapped position (formula (I)). The apparatus is configured to obtain a spherical domain radius value (formula (IV)) and an elevation angle (formula (V)) in dependence on the intermediate radius value (rxy, (formula (III)) and in dependence on a distance (z) of the object position from the base area. An apparatus for converting an object position of an audio object from a spherical representation to a spherical representation, applications of these apparatuses, methods and computer programs are also described.

7. 发明申请

WO2015010926A1 AUDIO ENCODER, AUDIO DECODER, METHODS AND COMPUTER PROGRAM USING JOINTLY ENCODED RESIDUAL SIGNALS 审中-公开
标题翻译：音频编码器，音频解码器，使用编号残留信号的方法和计算机程序
公开(公告)号：WO2015010926A1
公开(公告)日：2015-01-29
申请号：PCT/EP2014/064915
申请日：2014-07-11
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： DICK, Sascha , ERTEL, Christian , HELMRICH, Christian , HILPERT, Johannes , HÖLZER, Andreas , KUNTZ, Achim
IPC分类号： G10L19/008 , G10L21/038
CPC分类号： G10L19/008 , G10L19/0017 , G10L21/038 , H04S3/008 , H04S7/30 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： An audio decoder for providing at least four audio channel signals on the basis of an encoded representation is configured to provide a first residual signal and a second residual signal on the basis of a jointly encoded representation of the first residual signal and of the second residual signal using a multi-channel decoding. The audio decoder is configured to provide a first audio channel signal and a second audio channel signal on the basis of a first downmix signal and the first residual signal using a residual-signal- assisted multi-channel decoding. The audio decoder is configured to provide a third audio channel signal and a fourth audio channel signal on the basis of a second downmix signal and the second residual signal using a residual-signal-assisted multi-channel decoding. An audio encoder is based on corresponding considerations.
摘要翻译：用于基于编码表示提供至少四个音频信道信号的音频解码器被配置为基于第一残差信号和第二残差信号的联合编码表示来提供第一残差信号和第二残差信号使用多通道解码。音频解码器被配置为基于第一下混合信号和使用残留信号辅助的多信道解码来提供第一音频信道信号和第二音频信道信号。音频解码器被配置为使用残留信号辅助的多声道解码来基于第二下混信号和第二残差信号来提供第三音频声道信号和第四音频声道信号。音频编码器基于相应的考虑。

8. 发明申请

WO2015144766A1 APPARATUS AND METHOD FOR SCREEN RELATED AUDIO OBJECT REMAPPING 审中-公开
标题翻译：用于屏幕相关音乐对象重新绘制的装置和方法
公开(公告)号：WO2015144766A1
公开(公告)日：2015-10-01
申请号：PCT/EP2015/056417
申请日：2015-03-25
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： FÜG, Simone , PLOGSTIES, Jan , DICK, Sascha , HILPERT, Johannes , ROBILLIARD, Julien , KUNTZ, Achim , HÖLZER, Andreas
IPC分类号： H04R3/12 , H04N5/64 , H04N5/74 , H04N7/06 , H04R5/02 , G11B20/10 , H04S7/00 , H04S3/00
CPC分类号： G10L19/20 , G10L19/008 , G10L19/167 , H04N21/233 , H04N21/4318 , H04N21/439 , H04N21/4516 , H04N21/8106 , H04N21/84 , H04S3/008 , H04S7/00 , H04S7/30 , H04S7/308 , H04S2400/11
摘要： An apparatus for generating loudspeaker signals is provided. The apparatus comprises an object metadata processor (110) and an object renderer (120). The object renderer (120) is configured to receive an audio object. The object metadata processor (110) is configured to receive metadata, comprising an indication on whether the audio object is screen-related, and further comprising a first position of the audio object. The object metadata processor (110) is configured to calculate a second position of the audio object depending on the first position of the audio object and depending on a size of a screen, if the audio object is indicated in the metadata as being screen-related. The object renderer (120) is configured to generate the loudspeaker signals depending on the audio object and depending on position information. The object metadata processor (110) is configured to feed the first position of the audio object as the position information into the object renderer (120), if the audio object is indicated in the metadata as being not screen-related. The object metadata processor (110) is configured to feed the second position of the audio object as the position information into the object renderer (120), if the audio object is indicated in the metadata as being screen-related.
摘要翻译：提供一种用于产生扬声器信号的装置。该装置包括对象元数据处理器（110）和对象渲染器（120）。对象渲染器（120）被配置为接收音频对象。对象元数据处理器（110）被配置为接收元数据，其包括关于音频对象是否是屏幕相关的指示，还包括音频对象的第一位置。对象元数据处理器（110）被配置为根据音频对象的第一位置并根据屏幕的大小来计算音频对象的第二位置，如果音频对象在元数据中被指示为屏幕相关。对象渲染器（120）被配置为根据音频对象并根据位置信息产生扬声器信号。如果音频对象在元数据中被指示为不与屏幕相关，则对象元数据处理器（110）被配置为将音频对象的第一位置作为位置信息馈送到对象渲染器（120）。如果音频对象在元数据中被指示为与屏幕相关的话，对象元数据处理器（110）被配置为将音频对象的第二位置作为位置信息馈送到对象渲染器（120）。

9. 发明申请

WO2015011020A1 MULTI-CHANNEL AUDIO DECODER, MULTI-CHANNEL AUDIO ENCODER, METHODS AND COMPUTER PROGRAM USING A RESIDUAL-SIGNAL-BASED ADJUSTMENT OF A CONTRIBUTION OF A DECORRELATED SIGNAL 审中-公开
标题翻译：多声道音频解码器，多通道音频编码器，方法和计算机程序，使用基于信号的信号调整装饰信号的贡献
公开(公告)号：WO2015011020A1
公开(公告)日：2015-01-29
申请号：PCT/EP2014/065416
申请日：2014-07-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
发明人： DICK, Sascha , HELMRICH, Christian , HILPERT, Johannes , HÖLZER, Andreas
IPC分类号： G10L19/008 , G10L19/20
CPC分类号： G10L19/008 , G10L19/20 , G10L19/22 , H04S1/007 , H04S3/02 , H04S2400/03 , H04S2420/07
摘要： A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation is configured to perform a weighted combination of a downmix signal, a decorrelated signal and a residual signal, to obtain one of the output audio signals. The multi-channel audio decoder is configured to determine a weight describing a contribution of the decorrelated signal in the weighted combination in dependence on the residual signal, A multi-channel audio encoder for providing an encoded representation of a multi-channel audio signal is configured to obtain a downmix signal on the basis of the multi-channel audio signal, to provide parameters describing dependencies between the channels of the multi-channel audio signal, and to provide a residual signal. The multi-channel audio encoder is configured to vary an amount of residual signal included into the encoded representation in dependence on the multi-channel audio signal.
摘要翻译：用于基于编码表示提供至少两个输出音频信号的多声道音频解码器被配置为执行降混信号，去相关信号和残留信号的加权组合，以获得输出音频信号之一。多声道音频解码器被配置为根据剩余信号来确定描述加权组合中去相关信号的贡献的权重。配置用于提供多声道音频信号的编码表示的多声道音频编码器被配置以获得基于多声道音频信号的下混合信号，以提供描述多声道音频信号的声道之间的依赖性并提供残差信号的参数。多声道音频编码器被配置为根据多声道音频信号改变包括在编码表示中的残留信号的量。

10. 发明申请

WO2015010998A1 CONCEPT FOR AUDIO ENCODING AND DECODING FOR AUDIO CHANNELS AND AUDIO OBJECTS 审中-公开
标题翻译：音频编码和解码音频通道和音频对象的概念
公开(公告)号：WO2015010998A1
公开(公告)日：2015-01-29
申请号：PCT/EP2014/065289
申请日：2014-07-16
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FRIEDRICH-ALEXANDER-UNIVERSITAET ERLANGEN-NUERNBERG
发明人： ADAMI, Alexander , BORSS, Christian , DICK, Sascha , ERTEL, Christian , FÜG, Simone , HERRE, Jürgen , HILPERT, Johannes , HÖLZER, Andreas , KRATSCHMER, Michael , KÜCH, Fabian , KUNTZ, Achim , MURTAZA, Adrian , PLOGSTIES, Jan , SILZLE, Andreas , STENZEL, Hanne
IPC分类号： G10L19/008
CPC分类号： G10L19/20 , G10L19/008 , G10L19/028 , G10L19/18 , G10L19/22 , H04S3/008 , H04S2400/03 , H04S2400/11
摘要： Audio encoder for encoding audio input data (101) to obtain audio output data (501) comprises an input interface (100) for receiving a plurality of audio channels, a plurality of audio objects and metadata related to one or more of the plurality of audio objects; a mixer (200) for mixing the plurality of objects and the plurality of channels to obtain a plurality of pre-mixed channels, each pre-mixed channel comprising audio data of a channel and audio data of at least one object; a core encoder (300) for core encoding core encoder input data; and a metadata compressor (400) for compressing the metadata related to the one or more of the plurality of audio objects, wherein the audio encoder is configured to operate in at least one mode of the group of two modes comprising a first mode, in which the core encoder is configured to encode the plurality of audio channels and the plurality of audio objects received by the input interface as core encoder input data, and a second mode, in which the core encoder (300) is configured for receiving, as the core encoder input data, the plurality of pre-mixed channels generated by the mixer (200).
摘要翻译：用于编码音频输入数据（101）以获得音频输出数据（501）的音频编码器包括用于接收多个音频频道的输入接口（100），与多个音频中的一个或多个相关的多个音频对象和元数据对象; 混合器（200），用于混合多个对象和多个通道以获得多个预混合通道，每个预混合通道包括通道的音频数据和至少一个对象的音频数据; 核心编码器（300），用于核心编码核心编码器输入数据; 以及用于压缩与所述多个音频对象中的一个或多个音频对象相关的元数据的元数据压缩器（400），其中，所述音频编码器被配置为在包括第一模式的两种模式的组的至少一种模式中操作，其中核心编码器被配置为将由输入接口接收的多个音频通道和多个音频对象编码为核心编码器输入数据，以及第二模式，其中核心编码器（300）被配置为接收作为核心编码器输入数据，由混合器（200）产生的多个预混频道。

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