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1. 发明公开

KR20180054823A 선형 예측 코딩을 사용하여 감소된 배경 잡음을 갖는 오디오 신호를 인코딩하기 위한 인코더 및 방법 审中-公开
公开(公告)号：KR20180054823A
公开(公告)日：2018-05-24
申请号：KR20187011461
申请日：2016-09-23
申请人： FRAUNHOFER GES FORSCHUNG
发明人： FISCHER JOHANNES , BAECKSTROEM TOM , JOKINEN EMMA
IPC分类号： G10L19/06 , G10L21/0208
CPC分类号： G10L19/06 , G10L21/0208
摘要： 선형예측코딩을사용하여감소된배경잡음을갖는오디오신호를인코딩하기위한인코더가도시된다. 인코더는오디오신호의배경잡음을추정하도록구성된배경잡음추정기, 오디오신호로부터오디오신호의추정된배경잡음을감산함으로써배경잡음감소된오디오신호를발생시키도록구성된배경잡음감소기, 및오디오신호에선형예측분석이이루어지게하여제1 세트의선형예측필터(LPC) 계수들을획득하고배경잡음감소된오디오신호에선형예측분석이이루어지게하여제2 세트의선형예측필터(LPC) 계수들을획득하도록구성된예측기를포함한다. 더욱이, 인코더는획득된제1 세트의 LPC 계수들및 획득된제2 세트의 LPC 계수들에의해제어되는시간도메인필터들의캐스케이드로구성된분석필터를포함한다.

2. 发明专利

CA2939738C CONCEPT FOR ENCODING OF INFORMATION 未知
公开(公告)号：CA2939738C
公开(公告)日：2018-10-02
申请号：CA2939738
申请日：2015-02-09
申请人： FRAUNHOFER GES FORSCHUNG
发明人： BAECKSTROEM TOM , FISCHER PEDERSEN CHRISTIAN , FISCHER JOHANNES , HUETTENBERGER MATTHIAS , PINO ALFONSO
IPC分类号： G10L19/07
摘要： The invention provides an information encoder for encoding an information signal (IS), the information encoder (1) comprising: an analyzer (2) for analyzing the information signal (IS) in order to obtain linear prediction coefficients of a predictive polynomial A(z); a converter (3) for converting the linear prediction coefficients of the predictive polynomial A(z) to frequency values f1...fn of a spectral frequency representation of the predictive polynomial A(z), wherein the converter (3) is configured to determine the frequency values f1...fn by analyzing a pair of polynomials P(z) and Q(z) being defined as P(z) = A(z) + z-m-lA(z-1) and Q(z) = A(z) - z-m-lA(z-1), wherein m is an order of the predictive polynomial A(z) and I is greater or equal to zero, wherein the converter (3) is configured to obtain the frequency values (f1...fn) by establishing a strictly real spectrum (RES) derived from P(z) and a strictly imaginary spectrum (IES) from Q(z) and by identifying zeros of the strictly real spectrum (RES) derived from P(z) and the strictly imaginary spectrum (IES) derived from Q(z); a quantizer (4) for obtaining quantized frequency (fq1...fqn) values from the frequency values (f1...fn); and a bitstream producer (5) for producing a bitstream comprising the quantized frequency values (fq1...fqn).

3. 发明专利

CA3017405A1 ENCODING APPARATUS FOR PROCESSING AN INPUT SIGNAL AND DECODING APPARATUS FOR PROCESSING AN ENCODED SIGNAL 未知
公开(公告)号：CA3017405A1
公开(公告)日：2017-09-21
申请号：CA3017405
申请日：2017-03-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： BAECKSTROEM TOM , GHIDO FLORIN , FISCHER JOHANNES
IPC分类号： G10L19/038
摘要： The invention refers to an apparatus (1) for processing an input signal (3), comprising a perceptual weighter (10) and a quantizer (14). The perceptual weighter (10) comprises a model provider (12) and a model applicator (13). The model provider (12) provides a perceptual weighted model (W) based on the input signal (3). The model applicator (13) provides a perceptually weighted spectrum (x) by applying the perceptual weighted model (W) to a spectrum (s) based on the input signal (3). The quantizer (14) is configured to quantize the perceptually weighted spectrum (x) and for providing a bitstream (fi). The quantizer (14) comprises a random matrix applicator (16) and a sign function calculator (17). The random matrix applicator (16) is configured for applying a random matrix (P) to the perceptually weighted spectrum (x) in order to provide a transformed spectrum (u). The sign function calculator (17) is configured for calculating a sign function of components of the transformed spectrum (u) in order to provide the bitstream (u). The invention further refers to an apparatus (2) for processing an encoded signal (4) and to corresponding methods.

4. 发明专利

MX2012010439A DECODIFICADOR DE SEÑALES DE AUDIO, CODIFICADOR DE SEÑALES DE AUDIO, METODO PARA DECODIFICAR UNA SEÑAL DE AUDIO, METODO PARA CODIFICAR UNA SEÑAL DE AUDIO Y PROGRAMA DE COMPUTACION QUE UTILIZAN UNA ADAPTACION DEPENDIENTE DE LA FRECUENCIA DE UN CONTEXTO DE CODIFICACION. 未知
公开(公告)号：MX2012010439A
公开(公告)日：2013-04-29
申请号：MX2012010439
申请日：2011-03-09
申请人： FRAUNHOFER GES FORSCHUNG
发明人： EDLER BERND , GEIGER RALF , DISCH SASCHA , VILLEMOES LARS , BAECKSTROEM TOM , BAYER STEFAN
IPC分类号： G10L21/04 , G10L19/02 , G10L19/022 , G10L25/90
摘要： Un decodificador de señales de audio (150 para producir una representación de señal de audio decodificada (154) sobre la base de una representación de señal de audio codificada (152) que comprende una representación de espectro codificado (ac_spectral_data[]) y una información de distorsión de tiempo codificada (tw_data[]) comprende un decodificador de valores espectrales basado en el contexto (160) configurado para decodificar una palabra en código (acod_m) que describe uno o más valores espectrales o por lo menos una porción (m) de una representación numérica de uno o más valores espectrales dependiendo de un estado del contexto, para obtener valores espectrales decodificados (162, 297, x ac_dec[]). El decodificador de señales de audio también comprende un determinador de estado del contexto (170) configurado para determinar un estado actual del contexto (164, c) dependiendo de uno o más valores espectrales anteriormente decodificados (162, 297). El decodificador de señales de audio también comprende un convertidor del dominio de la frecuencia al dominio del tiempo con distorsión de tiempo (180) configurado para generar una representación en el dominio del tiempo con distorsión de tiempo (182) de un cuadro de audio dado sobre la base de una serie de valores espectrales decodificados (162) asociados al cuadro de audio dado y provistos por el decodificador de valores espectrales basado en el contexto y dependiendo de la información de distorsión de tiempo. El determinador del estado del contexto (170) está configurado para adaptar la determinación del estado del contexto a un cambio de una frecuencia fundamental entre los cuadros de audio subsiguientes. Un codificador de señales de audio aplica un concepto comparable.

5. 发明专利

HK1172727A1 MULTI-MODE AUDIO SIGNAL DECODER, MULTI-MODE AUDIO SIGNAL ENCODER, METHODS AND COMPUTER PROGRAM USING A LINEAR-PREDICTION-CODING BASED NOISE SHAPING 未知
公开(公告)号：HK1172727A1
公开(公告)日：2013-04-26
申请号：HK12113383
申请日：2012-12-27
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NEUENDORF MAX , FUCHS GUILLAUME , RETTELBACH NIKOLAUS , BAECKSTROEM TOM , LECOMTE JÉRÉMIE , HERRE JURGEN
摘要： A multi-mode audio signal decoder has a spectral value determinator to obtain sets of decoded spectral coefficients for a plurality of portions of an audio content and a spectrum processor configured to apply a spectral shaping to a set of spectral coefficients in dependence on a set of linear-prediction-domain parameters for a portion of the audio content encoded in a linear-prediction mode, and in dependence on a set of scale factor parameters for a portion of the audio content encoded in a frequency-domain mode. The audio signal decoder has a frequency-domain-to-time-domain converter configured to obtain a time-domain audio representation on the basis of a spectrally-shaped set of decoded spectral coefficients for a portion of the audio content encoded in the linear-prediction mode and for a portion of the audio content encoded in the frequency domain mode. An audio signal encoder is also described.

6. 发明专利

MX2012004116A DECODIFICADOR MULTIMODO PARA SEÑAL DE AUDIO, CODIFICADOR MULTIMODO PARA SEÑAL DE AUDIO, METODO Y PROGRAMA DE COMPUTACION QUE USAN UN MODELADO DE RUIDO EN BASE A LINEALIDAD-PREDICCION-CODI FICACION. 未知
公开(公告)号：MX2012004116A
公开(公告)日：2012-05-22
申请号：MX2012004116
申请日：2010-10-06
申请人： FRAUNHOFER GES FORSCHUNG
发明人： FUCHS GUILLAUME , NEUENDORF MAX , HERRE JUERGEN , RETTELBACH NIKOLAUS , BAECKSTROEM TOM , LECOMTE JEREMIE
IPC分类号： G10L19/02 , G10L19/14
摘要： Un decodificador multimodo para señal de audio para proporcionar una representación decodificada de un contenido de audio sobre la base de una representación codificada del contenido de audio comprende un determinador de valores espectrales, configurado para obtener conjuntos de coeficientes espectrales decodificados para una pluralidad de porciones del contenido de audio. El decodificador para señal de audio también comprende un procesador espectral configurado para aplicar un modelado espectral a un conjunto de coeficientes espectrales, o a una versión pre-procesada del mismo, dependiendo de un conjunto de parámetros de dominio de predicción lineal para una porción del contenido de audio codificado en un modo de predicción lineal, y para aplicar un modelado espectral a un conjunto de coeficientes espectrales decodificados, o una versión pre-procesada del mismo, dependiendo de un conjunto de parámetros de factores de escala para una porción del contenido de audio codificado en un modo de dominio de frecuencia. El decodificador para señal de audio comprende un convertidor de dominio de frecuencia a dominio de tiempo configurado para obtener una representación de dominio de tiempo del contenido de audio sobre la base de un conjunto modelado espectralmente de coeficientes espectrales decodificados para una porción del contenido de audio codificado en el modo de predicción lineal, y para obtener una representación de dominio de tiempo del contenido de audio sobre la base de un conjunto modelado espectralmente de coeficientes espectrales decodificados para una porción del contenido de audio codificado en el modo de dominio de frecuencia.

7. 发明专利

BR112012007803B1 Decodificador de sinal de áudio multimodal, codificador de sinal de áudio multimodal e métodos usando uma configuração de ruído com base em codificação de previsão linear 未知
公开(公告)号：BR112012007803B1
公开(公告)日：2022-03-15
申请号：BR112012007803
申请日：2010-10-06
申请人： FRAUNHOFER GES FORSCHUNG
发明人： FUCHS GUILLAUME , LECOMTE JÉRÉMIE , HERRE JÜRGEN , NEUENDORF MAX , RETTELBACH NIKOLAUS , BAECKSTROEM TOM
IPC分类号： G10L19/022
摘要： decodificador de sinal de áudio multimodal, codificador de sinal de áudio multimodal, métodos e programa de computador usando uma configuração de ruído com base em codificação de previsão linear. um decodificador de sinal de áudio multimodal para fornecer uma representação decodificada de um conteúdo de áudio com base em uma representação codificada do conteúdo de áudio compreende um determinador de valor espectral configurado para obter conjuntos de coeficientes espectrais decodificados para uma pluralidade de porções do conteúdo de áudio. o decodificador de sinal de áudio também compreende um processador de espectro configurado para aplicar uma configuração espectral a um conjunto de coeficientes espectrais, ou a sua versão pré-processada, em dependência de um conjunto de parâmetros de domínio de previsão linear para uma porção do conteúdo de áudio codificada em um modo de previsão linear, e aplicar uma configuração espectral a um conjunto de coeficientes espectrais decodificados, ou sua versão pré-processada, em dependência de um conjunto de parâmetros de fator de escala para uma porção do conteúdo de áudio codificada em um modo de domínio de frequência.

8. 发明专利

CA3017405C ENCODING APPARATUS FOR PROCESSING AN INPUT SIGNAL AND DECODING APPARATUS FOR PROCESSING AN ENCODED SIGNAL 未知
公开(公告)号：CA3017405C
公开(公告)日：2021-09-28
申请号：CA3017405
申请日：2017-03-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： BAECKSTROEM TOM , GHIDO FLORIN , FISCHER JOHANNES
IPC分类号： G10L19/038
摘要： The invention refers to an apparatus (1) for processing an input signal (3), comprising a perceptual weighter (10) and a quantizer (14). The perceptual weighter (10) comprises a model provider (12) and a model applicator (13). The model provider (12) provides a perceptual weighted model (W) based on the input signal (3). The model applicator (13) provides a perceptually weighted spectrum (x) by applying the perceptual weighted model (W) to a spectrum (s) based on the input signal (3). The quantizer (14) is configured to quantize the perceptually weighted spectrum (x) and for providing a bitstream (fi). The quantizer (14) comprises a random matrix applicator (16) and a sign function calculator (17). The random matrix applicator (16) is configured for applying a random matrix (P) to the perceptually weighted spectrum (x) in order to provide a transformed spectrum (u). The sign function calculator (17) is configured for calculating a sign function of components of the transformed spectrum (u) in order to provide the bitstream (u). The invention further refers to an apparatus (2) for processing an encoded signal (4) and to corresponding methods.

9. 发明专利

CA2777073C MULTI-MODE AUDIO SIGNAL DECODER, MULTI-MODE AUDIO SIGNAL ENCODER, METHODS AND COMPUTER PROGRAM USING A LINEAR-PREDICTION-CODING BASED NOISE SHAPING 未知
公开(公告)号：CA2777073C
公开(公告)日：2015-11-24
申请号：CA2777073
申请日：2010-10-06
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NEUENDORF MAX , FUCHS GUILLAUME , RETTELBACH NIKOLAUS , BAECKSTROEM TOM , LECOMTE JEREMIE , HERRE JUERGEN
IPC分类号： G10L19/00 , G10L19/12
摘要： A multi-mode audio signal decoder for providing a decoded representation of an audio content on the basis of an encoded representation of the audio content comprises a spectral value determinator configured to obtain sets of decoded spectral coefficients for a plurality of portions of the audio content. The audio signal decoder also comprises a spectrum processor configured to apply a spectral shaping to a set of spectral coefficients, or to a pre-processed version thereof, in dependence on a set of linear-prediction-domain parameters for a portion of the audio content encoded in a linear-prediction mode, and to apply a spectral shaping to a set of decoded spectral coefficients, or a pre-processed version thereof, in dependence on a set of scale factor parameters for a portion of the audio content encoded in a frequency-domain mode. The audio signal decoder comprises a frequency-domain-to-time-domain converter configured to obtain a time-domain representation of the audio content on the basis of a spectrally-shaped set of decoded spectral coefficients for a portion of the audio content encoded in the linear-prediction mode, and to obtain a time domain representation of the audio content on the basis of a spectrally shaped set of decoded spectral coefficients for a portion of the audio content encoded in the frequency domain mode. An audio signal encoder is also described.

10. 发明专利

AU2012217184B2 Encoding and decoding of pulse positions of tracks of an audio signal 未知
公开(公告)号：AU2012217184B2
公开(公告)日：2015-07-30
申请号：AU2012217184
申请日：2012-02-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： BAECKSTROEM TOM , FUCHS GUILLAUME
IPC分类号： G10L19/012
摘要： An apparatus for decoding an encoded audio signal, wherein one or more tracks are associated with the encoded audio signal, each one of the tracks having a plurality of track positions and a plurality of pulses is provided. The apparatus comprises a pulse information decoder (110) and a signal decoder (120). The pulse information decoder (110) is adapted to decode a plurality of pulse positions, wherein each one of the pulse positions indicates one of the track positions of one of the tracks to indicate a position of one of the pulses of the track, and wherein the pulse information decoder is configured to decode the plurality of pulse positions by using a track positions number indicating a total number of the track positions of at least one of the tracks, a total pulses number indicating a total number of the pulses of at least one of the tracks, and one state number. The signal decoder (120) is adapted to decode the encoded audio signal by generating a synthesized audio signal using the plurality of pulse positions and a plurality of predictive filter coefficients being associated with the encoded audio signal.

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