公开(公告)号：US10347274B2

公开(公告)日：2019-07-09

申请号：US15431571

申请日：2017-02-13

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.

公开(公告)号：US10339946B2

公开(公告)日：2019-07-02

申请号：US15138552

申请日：2016-04-26

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

发明人： Jérémie Lecomte

IPC分类号： G10L19/005 ,  G10L19/125 ,  G10L19/022 ,  G10L19/038 ,  G10L19/012 ,  G10L19/26 ,  G10L19/02 ,  G10L19/08 ,  G10L25/90 ,  G10L19/12

摘要： An audio decoder for providing a decoded audio information on the basis of an encoded audio information. The audio decoder has an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame, wherein the error concealment is configured to modify a time domain excitation signal obtained for one or more audio frames preceding a lost audio frame, in order to obtain the error concealment audio information.

公开(公告)号：US10332539B2

公开(公告)日：2019-06-25

申请号：US14680743

申请日：2015-04-07

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： G10L19/06 ,  G10L21/0388 ,  G10L19/008 ,  G10L19/025 ,  G10L19/03 ,  G10L19/02 ,  G10L19/022 ,  G10L19/032 ,  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.

公开(公告)号：US10332536B2

公开(公告)日：2019-06-25

申请号：US15621938

申请日：2017-06-13

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

发明人： Andreas Niedermeier ,  Stephan Wilde ,  Daniel Fischer ,  Matthias Hildenbrand ,  Marc Gayer ,  Max Neuendorf

IPC分类号： G10L19/20 ,  G10L19/22 ,  G10L19/008 ,  G10L19/24 ,  G10L21/038 ,  G10L19/022 ,  G10L19/16

摘要： An apparatus for decoding an encoded audio signal including bandwidth extension control data indicating either a first harmonic bandwidth extension mode or a second non-harmonic bandwidth extension mode, includes: an input interface for receiving the encoded audio signal including the bandwidth extension control data indicating either the first harmonic bandwidth extension mode or the second non-harmonic bandwidth extension mode; a processor for decoding the audio signal using the second non-harmonic bandwidth extension mode; and a controller for controlling the processor to decode the audio signal using the second non-harmonic bandwidth extension mode, even when the bandwidth extension control data indicates the first harmonic bandwidth extension mode for the encoded signal.

公开(公告)号：US10304471B2

公开(公告)日：2019-05-28

申请号：US15519007

申请日：2015-10-23

申请人： DOLBY INTERNATIONAL AB

发明人： Kristofer Kjoerling ,  Alexander Groeschel ,  Heiko Purnhagen ,  Holger Hoerich ,  Kurt Krauss

IPC分类号： G10L19/16 ,  G10L19/022 ,  H04N21/233 ,  H04N21/234

摘要： An audio signal (X) is represented by a bitstream (B) segmented into frames. An audio processing system (500) comprises a buffer (510) and a decoding section (520). The buffer joins sets of audio data (D1; D2, . . . , DN) carried by N respective frames (F1, F2, . . . , FN) into one decodable set of audio data (D) corresponding to a first frame rate and to a first number of samples of the audio signal per frame. The frames have a second frame rate corresponding to a second number of samples of the audio signal per frame. The first number of samples is N times the second number of samples. The decoding section decodes the decodable set of audio data into a segment of the audio signal by at least employing signal synthesis, based on the decodable set of audio data, with a stride corresponding to the first number of samples of the audio signal.

公开(公告)号：US10276184B2

公开(公告)日：2019-04-30

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.

公开(公告)号：US10276183B2

公开(公告)日：2019-04-30

申请号：US15002361

申请日：2016-01-20

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

发明人： Andreas Niedermeier ,  Christian Ertel ,  Ralf Geiger ,  Florin Ghido ,  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 having an encoded representation of a first set of first spectral portions and an encoded representation of parametric data indicating spectral energies for a second set of second spectral portions, has: an audio decoder for decoding the encoded representation of the first set of the first spectral portions to obtain a first set of first spectral portions and for decoding the encoded representation of the parametric data to obtain a decoded parametric data for the second set of second spectral portions indicating, for individual reconstruction bands, individual energies; a frequency regenerator for reconstructing spectral values in a reconstruction band having a second spectral portion using a first spectral portion of the first set of the first spectral portions and an individual energy for the reconstruction band, the reconstruction band having a first spectral portion and the second spectral portion.

公开(公告)号：US20190103129A1

公开(公告)日：2019-04-04

申请号：US16148708

申请日：2018-10-01

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Ki-hyun CHOO ,  Anton Viktorovich POROV ,  Konstantin Sergeevich OSIPOV

IPC分类号： G10L25/81 ,  G10L19/20 ,  G10L19/005 ,  G10L19/022 ,  G10L19/02 ,  G10L19/125

摘要： The present invention relates to an audio encoding and, more particularly, to a signal classifying method and device, and an audio encoding method and device using the same, which can reduce a delay caused by an encoding mode switching while improving the quality of reconstructed sound. The signal classifying method may comprise the operations of: classifying a current frame into one of a speech signal and a music signal; determining, on the basis of a characteristic parameter obtained from multiple frames, whether a result of the classifying of the current frame includes an error; and correcting the result of the classifying of the current frame in accordance with a result of the determination. By correcting an initial classification result of an audio signal on the basis of a correction parameter, the present invention can determine an optimum coding mode for the characteristic of an audio signal and can prevent frequent coding mode switching between frames.

公开(公告)号：US10249307B2

公开(公告)日：2019-04-02

申请号：US15620685

申请日：2017-06-12

申请人： QUALCOMM Incorporated

发明人： Venkata Subrahmanyam Chandra Sekhar Chebiyyam ,  Venkatraman Atti

IPC分类号： H04R5/00 ,  G10L19/008 ,  G10L19/022 ,  H04S3/00 ,  G10L19/26 ,  G10L21/038 ,  G10L19/24

摘要： A method for processing a signal includes receiving a first frame of an input audio bitstream at a decoder. The first frame includes at least one signal associated with a frequency range. The method also includes decoding the at least one signal to generate at least one decoded signal having an intermediate sampling rate. The intermediate sampling rate is based on coding information associated with the first frame. The method further includes generating a resampled signal based at least in part on the at least one decoded signal. The resampled signal has an output sampling rate of the decoder.

公开(公告)号：US10236007B2

公开(公告)日：2019-03-19

申请号：US15414289

申请日：2017-01-24

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

发明人： Sascha Disch ,  Martin Dietz ,  Markus Multrus ,  Guillaume Fuchs ,  Emmanuel Ravelli ,  Matthias Neusinger ,  Markus Schnell ,  Benjamin Schubert ,  Bernhard Grill

IPC分类号： G10L19/02 ,  G10L19/24 ,  G10L19/22 ,  G10L19/18 ,  G10L19/022 ,  G10L19/028 ,  G10L19/04 ,  G10L21/038 ,  G10L19/083 ,  G10L19/26 ,  G10L19/00

摘要： An audio encoder for encoding an audio signal, includes: a first encoding processor for encoding a first audio signal portion in a frequency domain, wherein the first encoding processor includes: a time frequency converter for converting the first audio signal portion into a frequency domain representation having spectral lines up to a maximum frequency of the first audio signal portion; a spectral encoder for encoding the frequency domain representation; a second encoding processor for encoding a second different audio signal portion in the time domain; a cross-processor for calculating, from the encoded spectral representation of the first audio signal portion, initialization data of the second encoding processor, so that the second encoding processing is initialized to encode the second audio signal portion immediately following the first audio signal portion in time in the audio signal.