公开(公告)号：EP2214164B1

公开(公告)日：2017-08-02

申请号：EP10152001.3

申请日：2010-01-28

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

发明人： Neuendorf, Max ,  Lecomte, Jérémie ,  Multrus, Markus ,  Bayer, Stefan ,  Nagel, Frederik ,  Fuchs, Guillaume ,  Robilliard, Julien ,  Rettelbach, Nikolaus ,  Geiger, Ralf ,  Grill, Bernhard

IPC分类号： G10L19/022 ,  G10L19/04 ,  G10L19/20

CPC分类号： G10L19/022 ,  G10L19/20

公开(公告)号：EP2980794A1

公开(公告)日：2016-02-03

申请号：EP14178817.4

申请日：2014-07-28

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

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

IPC分类号： G10L19/18 ,  G10L19/02 ,  G10L19/028 ,  G10L19/04 ,  G10L19/24 ,  G10L21/038

CPC分类号： G10L19/18 ,  G10L19/02 ,  G10L19/028 ,  G10L19/032 ,  G10L19/04 ,  G10L19/06 ,  G10L19/24 ,  G10L19/265 ,  G10L21/038

摘要： An audio encoder for encoding an audio signal, comprises: a first encoding processor (600) for encoding a first audio signal portion in a frequency domain, wherein the first encoding processor (600) comprises: a time frequency converter (602) 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; an analyzer (604) for analyzing the frequency domain representation up to the maximum frequency to determine first spectral portions to be encoded with a first spectral resolution and second spectral regions to be encoded with a second spectral resolution, the second spectral resolution being lower than the first spectral resolution; a spectral encoder (606) for encoding the first spectral portions with the first spectral resolution and for encoding the second spectral portions with the second spectral resolution; a second encoding processor (610) for encoding a second different audio signal portion in the time domain; a controller (620) configured for analyzing the audio signal and for determining, which portion of the audio signal is the first audio signal portion encoded in the frequency domain and which portion of the audio signal is the second audio signal portion encoded in the time domain; and an encoded signal former (630) for forming an encoded audio signal comprising a first encoded signal portion for the first audio signal portion and a second encoded signal portion for the second audio signal portion.

摘要翻译： 一种用于对音频信号进行编码的音频编码器，包括：用于对频域中的第一音频信号部分进行编码的第一编码处理器（600），其中所述第一编码处理器（600）包括：时间频率转换器（602） 第一音频信号部分转换成具有高达第一音频信号部分的最大频率的频谱线的频域表示; 分析器（604），用于分析直到最大频率的频域表示，以确定要用第一光谱分辨率编码的第一光谱部分和要用第二光谱分辨率编码的第二光谱区域，第二光谱分辨率低于 第一光谱分辨率; 用于对具有第一光谱分辨率的第一光谱部分进行编码并用第二光谱分辨率对第二光谱部分进行编码的光谱编码器（606） 用于对时域中的第二不同音频信号部分进行编码的第二编码处理器（610） 配置用于分析音频信号并确定音频信号的哪个部分是在频域中编码的第一音频信号部分的控制器（620），以及音频信号的哪个部分是在时域中编码的第二音频信号部分 ; 以及用于形成编码音频信号的编码信号形成器（630），包括用于第一音频信号部分的第一编码信号部分和用于第二音频信号部分的第二编码信号部分。

公开(公告)号：EP2410520A1

公开(公告)日：2012-01-25

申请号：EP11180988.5

申请日：2009-07-06

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

发明人： Bayer, Stefan ,  Disch, Sascha ,  Geiger, Ralf ,  Neuendorf, Max ,  Schuller, Gerald ,  Fuchs, Guillaume ,  Edler, Bernd

IPC分类号： G10L19/00 ,  G10L21/04

CPC分类号： G10L21/04 ,  G10L19/002 ,  G10L19/022 ,  G10L19/025 ,  G10L19/028 ,  G10L19/032 ,  G10L19/265 ,  G10L21/043 ,  G10L25/78 ,  G10L25/90

摘要： An audio encoder comprises a window function controller (504), a windower (502), a time warper (506) with a final quality check functionality, a time/frequency converter (508), a TNS stage (510) or a quantizer encoder (512), the window function controller (504), the time warper (506), the TNS stage (510) or an additional noise filling analyzer (524) are controlled by signal analysis results obtained by a time warp analyzer (516) or a signal classifier (520). Furthermore, a decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.

摘要翻译： 音频编码器包括窗函数控制器（504），加窗器（502），具有最终质量检查功能的时间扭曲器（506），时间/频率转换器（508），TNS级（510）或量化器编码器 通过时间扭曲分析器（516）获得的信号分析结果来控制窗函数控制器（504），时间扭曲器（506），TNS级（510）或附加噪声填充分析器（524） 信号分类器（520）。 此外，解码器使用取决于音频信号的谐波或语音特性的操纵噪声填充估计来应用噪声填充操作。

公开(公告)号：EP2410519A1

公开(公告)日：2012-01-25

申请号：EP11180983.6

申请日：2009-07-06

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

发明人： Bayer, Stefan ,  Disch, Sascha ,  Geiger, Ralf ,  Neuendorf, Max ,  Schuller, Gerald ,  Fuchs, Guillaume ,  Edler, Bernd

IPC分类号： G10L19/00 ,  G10L21/04

CPC分类号： G10L21/04 ,  G10L19/002 ,  G10L19/022 ,  G10L19/025 ,  G10L19/028 ,  G10L19/032 ,  G10L19/265 ,  G10L21/043 ,  G10L25/78 ,  G10L25/90

摘要： An audio encoder comprises a window function controller (504), a windower (502), a time warper (506) with a final quality check functionality, a time/frequency converter (508), a TNS stage (510) or a quantizer encoder (512), the window function controller (504), the time warper (506), the TNS stage (510) or an additional noise filling analyzer (524) are controlled by signal analysis results obtained by a time warp analyzer (516) or a signal classifier (520). Furthermore, a decoder applies a noise filling operation using a manipulated noise filling estimate depending on a harmonic or speech characteristic of the audio signal.

摘要翻译： 一种音频编码器包括窗口函数控制器（504），一个加窗器（502），一个时间扭曲器（506）与最终质量检查功能上，一时间/频率转换器（508），一个TNS级（510）或一个量化器编码器 （512），所述窗口函数控制器（504），所述时间扭曲器（506）中，TNS级（510）或额外的噪声填充分析器（524）通过由时间扭曲分析器（516）获得的信号分析结果来控制或 信号分类器（520）。 进一步，解码器应用使用操纵的噪声填充估计取决于音频信号的谐波或语音特性的噪声填充手术。

公开(公告)号：EP2293295A3

公开(公告)日：2011-09-07

申请号：EP10194095.5

申请日：2009-02-17

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

发明人： Multrus, Markus ,  Disch, Sascha ,  Nagel, Frederik ,  Rettelbach, Nikolaus ,  Fuchs, Guillaume

IPC分类号： G10L21/04

CPC分类号： G10L21/04 ,  G10L19/025

摘要： A signal manipulator for manipulating an audio signal having a transient event may comprise a transient remover (100), a signal processor (110) and a signal inserter (120) for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by said transient remover, so that a manipulated audio signal comprises a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor (110), which would destroy the vertical coherence of a transient.

公开(公告)号：EP2293294A3

公开(公告)日：2011-09-07

申请号：EP10194088.0

申请日：2009-02-17

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

发明人： Multrus, Markus ,  Disch, Sascha ,  Nagel, Frederik ,  Rettelbach, Nikolaus ,  Fuchs, Guillaume

IPC分类号： G10L21/04

CPC分类号： G10L21/04 ,  G10L19/025

摘要： A signal manipulator for manipulating an audio signal having a transient event may comprise a transient remover (100), a signal processor (110) and a signal inserter (120) for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by said transient remover, so that a manipulated audio signal comprises a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor (110), which would destroy the vertical coherence of a transient.

摘要翻译： 用于处理具有瞬变事件的音频信号的信号操纵器可以包括瞬变去除器（100），信号处理器（110）和信号插入器（120），用于将时间部分插入处理后的音频信号中的信号位置， 瞬态事件在由所述瞬态去除器处理之前被去除，使得被操纵的音频信号包括不受处理影响的瞬态事件，由此保持瞬态事件的垂直一致性而不是在信号处理器（110）中执行的任何处理， 这会破坏瞬态的垂直一致性。

公开(公告)号：EP2214165A2

公开(公告)日：2010-08-04

申请号：EP09012410.8

申请日：2009-09-30

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

发明人： Nagel, Frederik ,  Walther, Andreas ,  Fuchs, Guillaume ,  Lecomte, Jeremie ,  Popp, Harald ,  Wik, Tilo

IPC分类号： G10L19/02 ,  G10L21/04

CPC分类号： G10L21/04 ,  G10L19/025 ,  G10L19/028

摘要： An apparatus for manipulating an audio signal comprising a transient event comprises a transient signal replacer configured to replace a transient signal portion, comprising the transient event of the audio signal, with a replacement signal portion adapted to signal energy characteristics of one or more non-transient signal portions of the audio signal, or to signal energy characteristics of the transient signal portion, to obtain a transient-reduced audio signal. The apparatus also comprises a signal processor configured to process the transient-reduced audio signal to obtain a processed version of the transient-reduced audio signal. The apparatus also comprises a transient-signal-re-inserter configured to combine the processed version of the transient-reduced audio signal with a transient signal representing, in an original or processed form, a transient content of the transient signal portion.

摘要翻译： 对于包括瞬变事件的音频信号的操纵的装置包括被配置为更换一个暂态信号部分，包括所述音频信号的瞬态事件的瞬时信号替换器，用一个替换信号部分angepasst到信号的一个或多个非瞬时能量特性 所述音频信号的信号部分，或者以信号暂态信号部分的能量特性，以获得暂态减少音频信号。 因此，该装置包括被配置以处理瞬变减小的音频信号，以获得暂态减少音频信号的经处理版本的信号处理器。 因此，该装置包括：瞬时信号重插入器被配置为将暂态减少音频信号的经处理版本与表示瞬态信号结合，在原始或处理后的形式，暂态信号部分的瞬态的内容。

公开(公告)号：EP4235660A2

公开(公告)日：2023-08-30

申请号：EP23178772.2

申请日：2009-06-25

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

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

IPC分类号： G10L19/032

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.

公开(公告)号：EP4191580A1

公开(公告)日：2023-06-07

申请号：EP23150192.5

申请日：2019-12-06

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

发明人： Fuchs, Guillaume ,  Thiergart, Oliver ,  Korse, Srikanth ,  Döhla, Stefan ,  Multrus, Markus ,  Küch, Fabian ,  Bouthéon, Alexandre ,  Eichenseer, Andrea ,  Bayer, Stefan

IPC分类号： G10L19/008 ,  H04S3/00

摘要： An apparatus for generating a sound field description from an input signal comprising one or more channels, comprises: an input signal analyzer (600) for obtaining diffuseness data from the input signal; a sound component generator (650) for generating, from the input signal, one or more sound field components of a first group of sound field components having for each sound field component a direct component and a diffuse component, and for generating, from the input signal, a second group of sound field components having only a direct component, wherein the sound component generator is configured to perform an energy compensation when generating the first group of sound field components, the energy compensation depending on the diffuseness data and at least one of a number of diffuse components in the first group, and a maximum order of sound field components of the second group.

公开(公告)号：EP3683793A1

公开(公告)日：2020-07-22

申请号：EP20155722.0

申请日：2014-01-28

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

发明人： Fuchs, Guillaume ,  Helmrich, Christian ,  Jander, Manuel ,  Schubert, Benjamin ,  Yokotani, Yoshikazu

IPC分类号： G10L19/028

摘要： This invention relates to an audio decoder for providing a decoded audio information on the basis of an encoded audio information comprising linear prediction coefficients (LPC), a respective method, a respective computer program for performing such a method and an audio signal for a storage medium having stored such an audio signal, the audio signal having been treated with such a method. The audio decoder comprises a tilt adjuster configured to adjust a tilt of a noise using linear prediction coefficients of a current frame to obtain a tilt information and a noise inserter configured to add the noise to the current frame in dependence on the tilt information obtained by the tilt calculator. Another audio decoder according to the invention comprises a noise level estimator configured to estimate a noise level for a current frame using a linear prediction coefficient of at least one previous frame to obtain a noise level information; and a noise inserter configured to add a noise to the current frame in dependence on the noise level information provided by the noise level estimator. Thus, side information about a background noise in the bitstream may be omitted.