公开(公告)号：US10685659B2

公开(公告)日：2020-06-16

申请号：US16283591

申请日：2019-02-22

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Markus Multrus ,  Bernhard Grill ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Nikolaus Rettelbach ,  Virgilio Bacigalupo

IPC分类号： G10L19/022 ,  G10L19/025 ,  H03M7/30 ,  G10L19/02

摘要： An audio encoder for encoding segments of coefficients, the segments of coefficients representing different time or frequency resolutions of a sampled audio signal, the audio encoder including a processor for deriving a coding context for a currently encoded coefficient of a current segment based on a previously encoded coefficient of a previous segment, the previously encoded coefficient representing a different time or frequency resolution than the currently encoded coefficient. The audio encoder further includes an entropy encoder for entropy encoding the current coefficient based on the coding context to obtain an encoded audio stream.

公开(公告)号：US10165383B2

公开(公告)日：2018-12-25

申请号：US14945693

申请日：2015-11-19

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Juergen Herre ,  Johannes Hilpert ,  Stefan Geyersberger ,  Andreas Hoelzer ,  Claus Spenger

IPC分类号： G10L19/00 ,  H04S3/02 ,  G10L19/008 ,  H04S3/00 ,  G10L19/032

摘要： In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information.

公开(公告)号：US09633663B2

公开(公告)日：2017-04-25

申请号：US14304682

申请日：2014-06-13

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Albert Heuberger ,  Bernd Edler ,  Nikolaus Rettelbach ,  Stefan Geyersberger ,  Johannes Hilpert

IPC分类号： G10L21/00 ,  G10L19/008 ,  G10L25/69 ,  G10L19/032 ,  G10L15/00 ,  G10L13/00 ,  H03G3/00 ,  H04L27/08 ,  H04B15/00 ,  G06F11/00 ,  H04R25/00 ,  G06F17/00 ,  H03G9/00

CPC分类号： G10L19/008 ,  G10L19/032 ,  G10L25/69

摘要： An audio encoding apparatus includes an encoder for encoding a time segment of an input audio signal to be encoded to obtain a corresponding encoded signal segment. The audio encoding apparatus further includes a decoder for decoding the encoded signal segment to obtain a re-decoded signal segment. A clipping detector is provided for analyzing the re-decoded signal segment with respect to at least one of an actual signal clipping or an perceptible signal clipping and for generating a corresponding clipping alert. The encoder is further configured to again encode the time segment of the audio signal with at least one modified encoding parameter resulting in a reduced clipping probability in response to the clipping alert.

公开(公告)号：US09449606B2

公开(公告)日：2016-09-20

申请号：US14157185

申请日：2014-01-16

申请人： Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.

发明人： Nikolaus Rettelbach ,  Bernhard Grill ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Markus Multrus ,  Harald Popp ,  Juergen Herre ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

IPC分类号： G10L19/032 ,  G10L19/02 ,  G10L19/028 ,  G10L19/008 ,  G10L19/035 ,  G10L25/18

CPC分类号： G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

摘要： An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes 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 includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and 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 includes a noise filler for introducing 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.

摘要翻译： 用于基于表示音频信号的频带的频带的频谱分量的编码音频流提供音频信号的解码表示的解码器包括噪声填充器，用于将噪声引入多个频带的频谱分量中，分频频带 增益信息是根据共同的多频带噪声强度值相关联的。

公开(公告)号：US09043202B2

公开(公告)日：2015-05-26

申请号：US14250306

申请日：2014-04-10

申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Ralf Geiger ,  Max Neuendorf ,  Yoshikazu Yokotani ,  Nikolaus Rettelbach ,  Juergen Herre ,  Stefan Geyersberger

IPC分类号： G10L21/00 ,  G10L19/00 ,  G10L19/022 ,  G10L19/02 ,  G10L19/18 ,  H04N21/2368 ,  H04N21/2383 ,  H04N21/2662 ,  H04N21/434 ,  H04N21/438 ,  H04N19/00

CPC分类号： G10L19/18 ,  G10L19/00 ,  G10L19/02 ,  G10L19/022 ,  G10L19/032 ,  G10L19/265 ,  H04N19/00 ,  H04N21/2368 ,  H04N21/2383 ,  H04N21/2662 ,  H04N21/4341 ,  H04N21/4382

摘要： An apparatus for decoding data segments representing a time-domain data stream, a data segment being encoded in the time domain or in the frequency domain, a data segment being encoded in the frequency domain having successive blocks of data representing successive and overlapping blocks of time-domain data samples. The apparatus includes a time-domain decoder for decoding a data segment being encoded in the time domain and a processor for processing the data segment being encoded in the frequency domain and output data of the time-domain decoder to obtain overlapping time-domain data blocks. The apparatus further includes an overlap/add-combiner for combining the overlapping time-domain data blocks to obtain a decoded data segment of the time-domain data stream.

摘要翻译： 一种用于解码表示时域数据流的数据段的装置，在时域或频域中被编码的数据段，在频域中编码的数据段具有表示连续和重叠的时间块的连续的数据块 - 域数据样本。 该装置包括用于对在时域中编码的数据段进行解码的时域解码器和用于处理在频域中编码的数据段的处理器，并输出时域解码器的数据以获得重叠的时域数据块 。 该装置还包括用于组合重叠的时域数据块以获得时域数据流的解码数据段的重叠/加法组合器。

公开(公告)号：US08812305B2

公开(公告)日：2014-08-19

申请号：US13924441

申请日：2013-06-21

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

发明人： Ralf Geiger ,  Max Neuendorf ,  Yoshikazu Yokotani ,  Nikolaus Rettelbach ,  Juergen Herre ,  Stefan Geyersberger

IPC分类号： G10L21/00 ,  G10L19/00

CPC分类号： G10L19/18 ,  G10L19/00 ,  G10L19/02 ,  G10L19/022 ,  G10L19/032 ,  G10L19/265 ,  H04N19/00 ,  H04N21/2368 ,  H04N21/2383 ,  H04N21/2662 ,  H04N21/4341 ,  H04N21/4382

摘要： An apparatus for decoding data segments representing a time-domain data stream, a data segment being encoded in the time domain or in the frequency domain, a data segment being encoded in the frequency domain having successive blocks of data representing successive and overlapping blocks of time-domain data samples. The apparatus includes a time-domain decoder for decoding a data segment being encoded in the time domain and a processor for processing the data segment being encoded in the frequency domain and output data of the time-domain decoder to obtain overlapping time-domain data blocks. The apparatus further includes an overlap/add-combiner for combining the overlapping time-domain data blocks to obtain a decoded data segment of the time-domain data stream.

公开(公告)号：US12080306B2

公开(公告)日：2024-09-03

申请号：US18522762

申请日：2023-11-29

申请人： Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.

发明人： Nikolaus Rettelbach ,  Bernhard Grill ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Markus Multrus ,  Harald Popp ,  Juergen Herre ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

IPC分类号： G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

CPC分类号： G10L19/035 ,  G10L19/008 ,  G10L19/02 ,  G10L19/0204 ,  G10L19/028 ,  G10L19/032 ,  G10L25/18

摘要： An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes 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 includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and 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 includes a noise filler for introducing 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.

公开(公告)号：US11961530B2

公开(公告)日：2024-04-16

申请号：US18152721

申请日：2023-01-10

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

发明人： Ralf Geiger ,  Max Neuendorf ,  Yoshikazu Yokotani ,  Nikolaus Rettelbach ,  Juergen Herre ,  Stefan Geyersberger

IPC分类号： G10L19/18 ,  G10L19/00 ,  G10L19/02 ,  G10L19/022 ,  G10L19/032 ,  G10L19/26 ,  H04N19/00 ,  H04N21/2368 ,  H04N21/2383 ,  H04N21/2662 ,  H04N21/434 ,  H04N21/438

CPC分类号： G10L19/18 ,  G10L19/00 ,  G10L19/02 ,  G10L19/022 ,  G10L19/032 ,  G10L19/265 ,  H04N19/00 ,  H04N21/2368 ,  H04N21/2383 ,  H04N21/2662 ,  H04N21/4341 ,  H04N21/4382

摘要： An apparatus for decoding data segments representing a time-domain data stream, a data segment being encoded in the time domain or in the frequency domain, a data segment being encoded in the frequency domain having successive blocks of data representing successive and overlapping blocks of time-domain data samples. The apparatus includes a time-domain decoder for decoding a data segment being encoded in the time domain and a processor for processing the data segment being encoded in the frequency domain and output data of the time-domain decoder to obtain overlapping time-domain data blocks. The apparatus further includes an overlap/add-combiner for combining the overlapping time-domain data blocks to obtain a decoded data segment of the time-domain data stream.

公开(公告)号：US11024323B2

公开(公告)日：2021-06-01

申请号：US15643908

申请日：2017-07-07

申请人： Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.

发明人： Nikolaus Rettelbach ,  Bernhard Grill ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Markus Multrus ,  Harald Popp ,  Juergen Herre ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

IPC分类号： G10L19/035 ,  G10L19/02 ,  G10L19/028 ,  G10L19/032 ,  G10L19/008 ,  G10L25/18

摘要： An encoder for providing an audio stream on the basis of a transform-domain representation of an input audio signal includes 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 includes an audio stream provider for providing the audio stream such that the audio stream includes information describing an audio content of the frequency bands and 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 includes a noise filler for introducing 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.

公开(公告)号：US10206054B2

公开(公告)日：2019-02-12

申请号：US16103298

申请日：2018-08-14

申请人： FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.

发明人： Juergen Herre ,  Johannes Hilpert ,  Stefan Geyersberger ,  Andreas Hoelzer ,  Claus Spenger

IPC分类号： G10L19/00 ,  H04S3/02 ,  G10L19/032 ,  H04S3/00 ,  G10L19/008

摘要： In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel of the original channels, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information. Since the channel side information only occupy a low number of bits, and since the decoder does not use dematrixing, an efficient and high quality multi-channel extension for stereo players and enhanced multi-channel players is obtained.