公开(公告)号：EP4358082A1

公开(公告)日：2024-04-24

申请号：EP24160714.2

申请日：2010-10-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  VoiceAge Corporation ,  Koninklijke Philips N.V. ,  Dolby International AB

发明人： BESSETTE, Bruno ,  NEUENDORF, Max ,  GEIGER, Ralf ,  GOURNAY, Philippe ,  LEFEBVRE, Roch ,  GRILL, Bernhard ,  LECOMTE, Jérémie ,  BAYER, Stefan ,  RETTELBACH, Nikolaus ,  VILLEMOES, Lars ,  SALAMI, Redwan ,  DEN BRINKER, Albertus C.

IPC分类号： G10L19/18 ,  G10L19/02 ,  G10L19/04 ,  G10L19/03 ,  G10L19/12 ,  G10L19/20

CPC分类号： G10L19/0212 ,  G10L19/03 ,  G10L19/20 ,  G10L19/18 ,  G10L19/04 ,  G10L19/12

摘要： An audio signal decoder (200) for providing a decoded representation (212) of an audio content on the basis of an encoded representation (310) of the audio content comprises a transform domain path (230, 240, 242, 250, 260) configured to obtain a time-domain representation (212) of a portion of the audio content encoded in a transform-domain mode on the basis of a first set (220) of spectral coefficients, a representation (224) of an aliasing-cancellation stimulus signal and a plurality of linear-prediction-domain parameters (222). The transform domain path comprises a spectrum processor (230) configured to apply a spectrum shaping to the first set of spectral coefficients in dependence on at least a subset of the linear-prediction-domain parameters, to obtain a spectrally-shaped version (232) of the first set of spectral coefficients. The transform domain path comprises a first frequency-domain-to-time-domain converter (240) configured to obtain a time-domain representation of the audio content on the basis of the spectrally-shaped version of the first set of spectral coefficients. The transform domain path comprises an aliasing-cancellation stimulus filter configured to filter (250) the aliasing-cancellation stimulus signal (324) in dependence on at least a subset of the linear-prediction-domain parameters (222), to derive an aliasing-cancellation synthesis signal (252) from the aliasing-cancellation stimulus signal. The transform domain path also comprises a combiner (260) configured to combine the time-domain representation (242) of the audio content with the aliasing-cancellation synthesis signal (252), or a post-processed version thereof, to obtain an aliasing reduced time-domain signal.

公开(公告)号：EP4307686A3

公开(公告)日：2024-04-17

申请号：EP23212340.6

申请日：2015-09-08

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

发明人： THOMA, Herbert ,  BLEIDT, Robert ,  KRÄGELOH, Stefan ,  NEUENDORF, Max ,  KUNTZ, Achim ,  NIEDERMEIER, Andreas ,  KRATSCHMER, Michael

IPC分类号： H04H20/10 ,  H04N21/234

CPC分类号： H04N21/233 ,  H04N21/439 ,  H04H20/103 ,  H04N21/4302 ,  H04N21/44004 ,  H04N21/23424

摘要： Audio splicing is rendered more effective by the use of one or more truncation unit packets inserted into the audio data stream so as to indicate to an audio decoder, for a predetermined access unit, an end portion of an audio frame with which the predetermined access unit is associated, as to be discarded in playout.

公开(公告)号：EP2559032B1

公开(公告)日：2019-01-30

申请号：EP11714298.4

申请日：2011-04-14

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

发明人： NAGEL, Frederik ,  NEUENDORF, Max ,  SCHNELL, Markus ,  MULTRUS, Markus

IPC分类号： G10L21/02

公开(公告)号：EP3268960A1

公开(公告)日：2018-01-17

申请号：EP16709331.9

申请日：2016-03-07

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

发明人： EDLER, Bernd ,  HELMRICH, Christian ,  NEUENDORF, Max ,  SCHUBERT, Benjamin

IPC分类号： G10L19/02

摘要： An encoder for encoding an audio signal. The encoder is configured to encode the audio signal in a transform domain or filter-bank domain, wherein the encoder is configured to determine spectral coefficients of the audio signal for a current frame and at least one previous frame, wherein the encoder is configured to selectively apply predictive encoding to a plurality of individual spectral coefficients or groups of spectral coefficients which are separated by at least one spectral coefficient.

公开(公告)号：EP2686849A1

公开(公告)日：2014-01-22

申请号：EP12715632.1

申请日：2012-03-19

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. ,  Dolby International AB ,  Koninklijke Philips Electronics N.V.

发明人： NEUENDORF, Max ,  MULTRUS, Markus ,  DÖHLA, Stefan ,  PURNHAGEN, Heiko ,  DE BONT, Frans

IPC分类号： G10L19/14

CPC分类号： G10L19/008 ,  G10L19/00 ,  G10L19/167 ,  G10L19/18

摘要： Frame elements which shall be made available for skipping may are transmitted more efficiently by arranging that a default payload length information is transmitted separately within a configuration block, with the length information within the frame elements, in turn, being subdivided into a default payload length flag followed, if the default payload length flag is not set, by a payload length value explicitly coding the payload length of the respective frame element. However, if the default payload length flag is set, an explicit transmission of the payload length may be avoided. Rather, any frame element, the default extension payload length flag of which is set, has the default payload length and any frame element, the default extension payload length flag of which is not set, has a payload length corresponding to the payload length value. By this measure, transmission effectiveness is increased.

摘要翻译： 通过安排比特流的每个帧序列具有N个帧元素的序列，从而实现了一方面太高的比特流和解码开销与另一方面的帧元素定位的灵活性之间的更好的折中，并且在 比特流具有表示元素数N的字段的配置块和表示对于N个元素位置的序列的每个元素位置的多个元素类型中的元素类型的类型指示语法部分， 在帧的N个帧元素的序列中，每个帧元素是由类型指示部分针对相应元素位置指示的元素类型，其中相应的元素位置在相应的帧元素的N个帧元素的序列之内 帧中的比特流。

公开(公告)号：EP2260485B1

公开(公告)日：2013-04-03

申请号：EP09776910.3

申请日：2009-07-01

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

发明人： BAYER, Stefan ,  DISCH, Sascha ,  GEIGER, Ralf ,  FUCHS, Guillaume ,  NEUENDORF, Max ,  SCHULLER, Gerald ,  EDLER, Bernd

IPC分类号： G10L19/00 ,  G10L19/02 ,  G10L21/04

CPC分类号： G10L21/04 ,  G10L19/0212 ,  G10L19/022 ,  G10L19/032 ,  G10L19/167

公开(公告)号：EP2559032A1

公开(公告)日：2013-02-20

申请号：EP11714298.4

申请日：2011-04-14

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

发明人： NAGEL, Frederik ,  NEUENDORF, Max ,  SCHNELL, Markus ,  MULTRUS, Markus

IPC分类号： G10L21/02

CPC分类号： G10L21/038

摘要： An apparatus, method and computer program for generating a wideband signal using a lowband input signal includes a processor for performing a guided bandwidth extension operation using transmitted parameters and a blind bandwidth extension operation only using derived parameters rather than transmitted parameters. To this end, the processor includes a parameter generator for generating the parameters for the blind bandwidth extension operation.

公开(公告)号：EP2301028B1

公开(公告)日：2012-12-05

申请号：EP09776811.3

申请日：2009-06-23

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

发明人： NEUENDORF, Max ,  GRILL, Bernhard ,  KRAEMER, Ulrich ,  MULTRUS, Markus ,  POPP, Harald ,  RETTELBACH, Nikolaus ,  NAGEL, Frederik ,  LOHWASSER, Markus ,  GAYER, Marc ,  JANDER, Manuel ,  BACIGALUPO, Virgilio

IPC分类号： G10L21/02 ,  G10L19/02

CPC分类号： G10L21/038 ,  G10L19/0208 ,  G10L19/025 ,  G10L19/20

公开(公告)号：EP2269189B1

公开(公告)日：2011-11-16

申请号：EP10712439.8

申请日：2010-04-01

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

发明人： NAGEL, Frederik ,  NEUENDORF, Max ,  RETTELBACH, Nikolaus ,  LECOMTE, Jérémie ,  MULTRUS, Markus ,  GRILL, Bernhard ,  DISCH, Sascha

IPC分类号： G10L21/02

CPC分类号： G10L19/008 ,  G10L19/18 ,  G10L21/038

摘要： An apparatus for generating a representation of a bandwidth-extended signal on the basis of an input signal representation comprises a phase vocoder configured to obtain values of a spectral domain representation of a first patch of the bandwidth-extended signal on the basis of the input signal representation. The apparatus also comprises a value copier configured to copy a set of values of the spectral domain representation of the first patch, which values are provided by the phase vocoder, to obtain a set of values of a spectral domain representation of a second patch, wherein the second patch is associated with higher frequencies than the first patch. The apparatus is configured to obtain the representation of the bandwidth-extended signal using the values of the spectral domain representation of the first patch and the values of the spectral domain representation of the second patch.

摘要翻译： 一种用于基于输入信号表示来生成带宽扩展信号的表示的装置包括：相位声码器，其被配置为基于输入信号来获得带宽扩展信号的第一片的频谱域表示的值 表示。 该设备还包括值复制器，该值复制器被配置为复制由相位声码器提供的第一块的频谱域表示的一组值，以获得第二块的谱域表示的一组值，其中， 第二个贴片的频率高于第一个贴片的频率。 该装置被配置为使用第一补丁的频谱域表示的值和第二补丁的频谱域表示的值来获得带宽扩展信号的表示。

公开(公告)号：EP2382625A2

公开(公告)日：2011-11-02

申请号：EP10720358.0

申请日：2010-01-28

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

发明人： GEIGER, Ralf ,  LECOMTE, Jérémie ,  MULTRUS, Markus ,  NEUENDORF, Max ,  SPITZNER, Christian

IPC分类号： G10L19/02 ,  G10L19/14

CPC分类号： G10L19/167 ,  G10L19/0017 ,  G10L19/022 ,  G10L19/24

摘要： An audio decoder for providing a decoded audio information on the basis of an encoded audio information comprises a window-based signal transformer configured to map a time-frequency representation, which is described by the encoded audio information, to a time-domain representation. The window-based signal transformer is configured to select a window, out of a plurality of windows comprising windows of different transition slopes and windows of different transform length, on the basis of a window information. The audio decoder comprises a window selector configured to evaluate a variable-codewordlength window information in order to select a window for a processing of a given portion of the time-frequency representation associated with a given frame of the audio information.