公开(公告)号：EP3061090A1

公开(公告)日：2016-08-31

申请号：EP14786881.4

申请日：2014-10-20

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： KÜCH, Fabian ,  UHLE, Christian ,  KRATSCHMER, Michael ,  NEUGEBAUER, Bernhard ,  MEIER, Michael ,  BORSUM, Arne

IPC分类号： G10L21/034 ,  H03G9/00 ,  H03G11/00 ,  G10L19/16 ,  G10L19/008

CPC分类号： G10L19/167 ,  G06F3/165 ,  G10L19/008 ,  G10L19/018 ,  G10L21/034 ,  H03G9/005 ,  H03G11/008

摘要： The invention provides a concept for combined dynamic range compression and guided clipping prevention for audio devices. An audio decoder for decoding an audio bitstream and a metadata bitstream related to the audio bitstream according to the concept includes an audio processing chain including a plurality of adjustment stages including a dynamic range control stage for adjusting a dynamic range of the audio output signal and a guided clipping prevention stage for preventing clipping of the audio output signal; and a metadata decoder configured to receive the metadata bitstream and to extract dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream, at least a part of the dynamic range control gain sequences being supplied to the dynamic range control stage, and at least a part of the guided clipping prevention gain sequences being supplied to the guided clipping prevention stage.

摘要翻译： 本发明提供了组合的动态范围压缩为音频设备的一个概念和引导削波防止。 对于音频比特流的解码和与音频位流雅丁到概念的元数据的比特流的音频解码器包括在音频处理链包括调节阶段，包括用于调整所述音频输出信号和动态范围的动态范围控制级一个多元化 引导剪裁预防阶段防止音频输出信号的限幅; 和元数据解码器配置为接收所述元数据的比特流，并从元数据的比特流中提取的动态范围控制增益序列和引导削波防止增益序列，至少被提供给动态范围控制级的动态范围控制增益序列的一部分，和 至少被引导削波防止增益序列的一部分被供应到所述引导裁剪预防阶段。

公开(公告)号：EP2335242B1

公开(公告)日：2020-03-18

申请号：EP09752278.3

申请日：2009-10-06

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  GEIGER, Ralf ,  BORSUM, Arne ,  NAGEL, Frederik ,  ROBILLIARD, Julien ,  SUBBARAMAN, Vignesh ,  LECOMTE, Jérémie

IPC分类号： G10L19/00 ,  G10L19/02

公开(公告)号：EP2946384B1

公开(公告)日：2016-11-02

申请号：EP14702195.0

申请日：2014-01-07

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： SCHREINER, Stephan ,  BORSUM, Arne ,  NEUSINGER, Matthias ,  JANDER, Manuel ,  LOHWASSER, Markus ,  NEUGEBAUER, Bernhard

IPC分类号： G10L19/00

CPC分类号： G10L19/005 ,  G10L19/0017 ,  G10L19/02 ,  G10L21/0224 ,  G10L21/0232 ,  G10L21/0332 ,  G10L21/034

摘要： An audio signal decoder (100) for providing a decoded audio signal representation on the basis of an encoded audio signal representation comprises a decoder preprocessing stage (110) for obtaining a plurality of frequency band signals from the encoded audio signal representation, a clipping estimator (120), a level shifter (130), a frequency-to-time-domain converter (140), and a level shift compensator (150). The clipping estimator (120) analyzes the encoded audio signal representation and/or side information relative to a gain of the frequency band signals in order to determine a current level shift factor. The level shifter (130) shifts levels of the frequency band signals according to the level shift factor. The frequency-to-time-domain converter (140) converts the level shifted frequency band signals into a time-domain representation. The level shift compensator (150) acts on the time-domain representation for at least partly compensating a corresponding level shift and for obtaining a substantially compensated time-domain representation.

公开(公告)号：EP2896221B1

公开(公告)日：2016-11-02

申请号：EP13765670.8

申请日：2013-09-12

申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： BORSUM, Arne ,  SCHREINER, Stephan ,  FUCHS, Harald ,  KRATZ, Michael ,  GRILL, Bernhard ,  SCHARRER, Sebastian

IPC分类号： H04S3/00

CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/173 ,  H04S3/002 ,  H04S3/02 ,  H04S5/005 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/03

公开(公告)号：EP2946384A1

公开(公告)日：2015-11-25

申请号：EP14702195.0

申请日：2014-01-07

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： SCHREINER, Stephan ,  BORSUM, Arne ,  NEUSINGER, Matthias ,  JANDER, Manuel ,  LOHWASSER, Markus ,  NEUGEBAUER, Bernhard

IPC分类号： G10L19/00

CPC分类号： G10L19/005 ,  G10L19/0017 ,  G10L19/02 ,  G10L21/0224 ,  G10L21/0232 ,  G10L21/0332 ,  G10L21/034

摘要： An audio signal decoder (100) for providing a decoded audio signal representation on the basis of an encoded audio signal representation comprises a decoder preprocessing stage (110) for obtaining a plurality of frequency band signals from the encoded audio signal representation, a clipping estimator (120), a level shifter (130), a frequency-to-time-domain converter (140), and a level shift compensator (150). The clipping estimator (120) analyzes the encoded audio signal representation and/or side information relative to a gain of the frequency band signals in order to determine a current level shift factor. The level shifter (130) shifts levels of the frequency band signals according to the level shift factor. The frequency-to-time-domain converter (140) converts the level shifted frequency band signals into a time-domain representation. The level shift compensator (150) acts on the time-domain representation for at least partly compensating a corresponding level shift and for obtaining a substantially compensated time-domain representation.

公开(公告)号：EP3951778A1

公开(公告)日：2022-02-09

申请号：EP21186145.5

申请日：2014-10-20

申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.

发明人： KUECH, Fabian ,  UHLE, Christian ,  KRATSCHMER, Michael ,  NEUGEBAUER, Bernhard ,  MEIER, Michael ,  BORSUM, Arne

IPC分类号： G10L21/034 ,  H03G9/00 ,  H03G11/00 ,  G10L19/16 ,  G10L19/008

摘要： The invention provides a concept for combined dynamic range compression and guided clipping prevention for audio devices. An audio decoder for decoding an audio bitstream and a metadata bitstream related to the audio bitstream according to the concept comprises
an audio processing chain configured to receive a decoded audio signal derived from the audio bitstream and to adjust characteristics of the audio signal in order to produce an audio output signal, the audio adjustment chain comprising a plurality of adjustment stages including a dynamic range control stage for adjusting a dynamic range of the audio output signal and a guided clipping prevention stage for preventing clipping of the audio output signal; and
a metadata decoder configured to receive the metadata bitstream and to extract dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream, at least a part of the dynamic range control gain sequences being supplied to the dynamic range control stage, and at least a part of the guided clipping prevention gain sequences being supplied to the guided clipping prevention stage.

公开(公告)号：EP3061090B1

公开(公告)日：2019-04-17

申请号：EP14786881.4

申请日：2014-10-20

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： KÜCH, Fabian ,  UHLE, Christian ,  KRATSCHMER, Michael ,  NEUGEBAUER, Bernhard ,  MEIER, Michael ,  BORSUM, Arne

IPC分类号： G10L21/034 ,  H03G9/00 ,  H03G11/00 ,  G10L19/16 ,  G10L19/008

公开(公告)号：EP2896221A1

公开(公告)日：2015-07-22

申请号：EP13765670.8

申请日：2013-09-12

申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： BORSUM, Arne ,  SCHREINER, Stephan ,  FUCHS, Harald ,  KRATZ, Michael ,  GRILL, Bernhard ,  SCHARRER, Sebastian

IPC分类号： H04S3/00

CPC分类号： G10L19/008 ,  G10L19/02 ,  G10L19/173 ,  H04S3/002 ,  H04S3/02 ,  H04S5/005 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/03

摘要： An apparatus (100) for downmixing three or more audio input channels to obtain two or more audio output channels is provided. The apparatus (100) comprises a receiving interface (110) for receiving the three or more audio input channels and for receiving side information. Moreover, the apparatus (100) comprises a downmixer (120) for downmixing the three or more audio input channels depending on the side information to obtain the two or more audio output channels. The number of the audio output channels is smaller than the number of the audio input channels. The side information indicates a characteristic of at least one of the three or more audio input channels, or a characteristic of one or more sound waves recorded within the one or more audio input channels, or a characteristic of one or more sound sources which emitted one or more sound waves recorded within the one or more audio input channels.

摘要翻译： 提供了一种用于将三个或更多个音频输入通道进行混合以获得两个或多个音频输出通道的装置。 该装置包括用于接收三个或更多音频输入通道和用于接收侧信息的接收接口。 此外，该装置包括用于根据侧面信息对三个或更多个音频输入通道进行混合以获得两个或更多个音频输出通道的降混器。 音频输出通道的数量小于音频输入通道的数量。 侧面信息表示三个或更多个音频输入通道中的至少一个或记录在一个或多个音频输入通道内的一个或多个声波的特性，或一个或多个声源的特性，发出一个 或更多的声波记录在一个或多个音频输入通道内。

公开(公告)号：EP2335242A2

公开(公告)日：2011-06-22

申请号：EP09752278.3

申请日：2009-10-06

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： FUCHS, Guillaume ,  MULTRUS, Markus ,  GEIGER, Ralf ,  BORSUM, Arne ,  NAGEL, Frederik ,  ROBILLIARD, Julien ,  SUBBARAMAN, Vignesh ,  LECOMTE, Jérémie

IPC分类号： G10L19/00 ,  G10L19/02

摘要： An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal comprises a quantization error calculator configured to determine a multi-band quantization error over a plurality of frequency bands of the input audio signal for which separate band gain information is available. The encoder also comprises an audio stream provider configured to provide the audio stream such that the audio stream comprises an information describing an audio content of the frequency bands and an information describing the multi-band quantization error. A decoder for providing a decoded representation of an audio signal on the basis of an encoded audio stream representing spectral components of frequency bands of the audio signal comprises a noise filler configured to introduce noise into spectral components of a plurality of frequency bands to which separate frequency band gain information is associated on the basis of a common multi-band noise intensity value.