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81. 发明专利

CA2730232A1 AN APPARATUS AND A METHOD FOR DECODING AN ENCODED AUDIO SIGNAL 未知
公开(公告)号：CA2730232A1
公开(公告)日：2010-01-17
申请号：CA2730232
申请日：2009-06-23
申请人： FRAUNHOFER GES FORSCHUNG
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： G10L19/14 , G10L21/02
摘要： An apparatus for decoding (100) an encoded audio signal (102). A first decoder (110a) decodes a first portion (104a) in accordance with a first decoding algorithm for a first time portion of the encoded signal (102) to obtain a first decoded signal (114a). A second decoder (110b) decodes a second portion (104b) in accordance with a second decoding algorithm for a second time portion of the encoded signal (102) to obtain a second decoded signal (114b). A BWE module (130) has a controllable crossover frequency (fx) and is configured for performing a bandwidth extension algorithm using the first decoded signal (114a) and BWE parameters (106) for the first portion (104a), and for performing a bandwidth extension algorithm using the second decoded signal (114b) and the bandwidth extension parameters (106) for the second portion (104b). A controller (140) controls the crossover frequency (fx) for the BWE module (130) in accordance with a coding mode information (108).

82. 发明专利

BR122021017391B1 Esquema de codificação/decodificação de áudio com taxa de bits baixa com pré-processamento comum 未知
公开(公告)号：BR122021017391B1
公开(公告)日：2022-02-22
申请号：BR122021017391
申请日：2009-07-06
申请人： FRAUNHOFER GES FORSCHUNG
发明人： GRILL BERNHARD , NAGEL FREDERIK , SCHULLER GERALD , FUCHS GUILLAUME , POPP HARALD , HIRSCHFELD JENS , LECOMTE JEREMIE , HILPERT JOHANNES , HERRE JUERGEN , MULTRUS MARKUS , NEUENDORF MAX , RETTELBACH NIKOLAUS , GEIGER RALF , DISCH SASCHA , BAYER STEFAN , GEYERSBERGER STEFAN , WABNIK STEFAN , KRAEMER ULRICH , YOKOTANI YOSHIKAZU
IPC分类号： G10L19/00 , G10L19/008 , G10L19/02 , G10L19/16 , G10L19/18
摘要： um codificador de áudio compreende uma etapa de pré-processamento comum (100), uma ramificação de codificação ba-seada em escoadouro de informações (400) como a ramificação de codificação de domínio espectral, uma ramificação de codificação baseada na fonte de informações (500) como uma ramificação de codificação de domínio lpc e uma chave (200) para alternar entre essas ramificações em entradas nessas ramificações ou saídas dessas ramificações controladas por uma etapa de decisão (300). um decodificador de áudio compreende uma ramificação de decodificação de domínio espectral, uma ramificação de decodificação de domínio lpc, uma ou mais chaves para alternância entre as ramificações e uma etapa de pós-processamento comum para pós-processar um sinal de áudio de domínio de tempo para obter um sinal de áudio pós-processado.

83. 发明专利

BRPI0904958B1 aparelho e método para calcular dados de extensão de largura de banda usando um quadro controlado por inclinação espectral 未知
公开(公告)号：BRPI0904958B1
公开(公告)日：2020-03-03
申请号：BRPI0904958
申请日：2009-06-23
申请人： FRAUNHOFER GES FORSCHUNG
发明人： DISCH SASCHA , KRAEMER ULRICH , NAGEL FREDERIK , NEUENDORF MAX , WABNIK STEFAN
IPC分类号： G10L21/02 , G10L25/93
摘要： aparelho e método para calcular dados de extensão de largura de banda usando um quadro controlado por inclinação espectral aparelho para calcular dados de extensão de largura de banda de um sinal de áudio em um sistema de extensão de largura de banda, no qual uma primeira banda espectral é codificada com um primeiro número de bits e uma segunda banda espectral diferente da primeira banda espectral é codificada com um segundo número de bits, o segundo número de bits sendo menor que o primeiro número de bits, tendo um calculador de parâmetro de extensão de largura de banda (10) para calcular parâmetros de extensão de largura de banda para a segunda banda de freqüência em âmbito de quadro para uma seqüência de quadros do sinal de áudio. cada quadro tem um instante de tempo de início controlável. o aparelho adicionalmente compreende um detector de inclinação espectral (12) para detectar uma inclinação espectral em uma porção de tempo do sinal de áudio e para sinalizar o instante de tempo de início para os quadros individuais do sinal de áudio dependendo da inclinação espectral.

84. 发明专利

PL2038879T3 Koder audio i dekoder audio mające dynamicznie zmienną charakterystykę odkształcania 未知
公开(公告)号：PL2038879T3
公开(公告)日：2016-04-29
申请号：PL07725316
申请日：2007-05-16
申请人： FRAUNHOFER GES FORSCHUNG
发明人： HERRE JUERGEN , GRILL BERNHARD , MULTRUS MARKUS , BAYER STEFAN , KRAEMER ULRICH , HIRSCHFELD JENS , WABNIK STEFAN , SCHULLER GERALD
IPC分类号： G10L19/00 , G10L19/20

85. 发明专利

CA2729971C AN APPARATUS AND A METHOD FOR CALCULATING A NUMBER OF SPECTRAL ENVELOPES 未知
公开(公告)号：CA2729971C
公开(公告)日：2014-11-04
申请号：CA2729971
申请日：2009-06-23
申请人： FRAUNHOFER GES FORSCHUNG
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： G10L19/02
摘要： An apparatus (100) calculates a number (102) of spectral envelopes (104) to be derived by a spectral band replication (SBR) encoder, wherein the SBR encoder is adapted to encode an audio signal (105) using a plurality of sample values within a predetermined number of subsequent time portions (110) in an SBR frame extending from an initial time (t0) to a final time (tn), the predetermined number of subsequent time portions (110) being arranged in a time sequence given by the audio signal (105). The apparatus (100) comprises a decision value calculator (120) for determining a decision value (125), the decision value (125) measuring a deviation in spectral energy distributions of a pair of neighboring time portions. The apparatus (100) further comprises a detector (130) for detecting a violation (135) of a threshold by the decision value (125) and a processor (140) for determining a first envelope border (145) between the pair of neighboring time portions when the violation (135) of the threshold is detected. The apparatus (100) further comprises a processor (150) for determining a second envelope border (155) between a different pair of neighboring time portions or at the initial time (t0) or at the final time (tn) for an envelope having the first envelope border (145) based on the violation (135) of the threshold for the other pair or based on a temporal position of the pair or the different pair in the SBR frame. The apparatus (100) further comprises a number processor (160) for establishing the number (102) of spectral envelopes (104) having the first envelope border (145) and the second envelope border (155).

86. 发明专利

CA2730198C AUDIO SIGNAL SYNTHESIZER AND AUDIO SIGNAL ENCODER 未知
公开(公告)号：CA2730198C
公开(公告)日：2014-09-16
申请号：CA2730198
申请日：2009-06-19
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NAGEL FREDERIK , DISCH SASCHA , RETTELBACH NIKOLAUS , NEUENDORF MAX , GRILL BERNHARD , KRAEMER ULRICH , WABNIK STEFAN
IPC分类号： G10L19/00
摘要： In accordance with a first aspect of the invention, an audio signal synthesizer generates a synthesis audio signal having a first frequency band and a second synthesized frequency band derived from the first frequency band. The audio signal synthesizer comprises a patch generator, a spectral converter, a raw signal processor and a combiner. The patch generator performs at least two different patching algorithms, wherein each patching algorithm generates a raw signal having signal components in the second synthesized frequency band using an audio signal having signal components in the first frequency band. The patch generator is adapted to select one of the at least two different patching algorithms in response to a control information for a first time portion and the other of the at least two different patching algorithms in response to the control information for a second time portion different from the first time portion to obtain the raw signal for the first and the second time portion. The spectral converter converts the raw signal into a raw signal spectral representation. The raw signal processor processes the raw signal spectral representation in response to spectral domain spectral band replication parameters to obtain an adjusted raw signal spectral representation. The combiner combines an audio signal having signal components in the first band or a signal derived from the audio signal with the adjusted raw signal spectral representation or with a further signal derived from the adjusted raw signal spectral representation to obtain the synthesis audio signal.

87. 发明专利

AU2013257391A1 An apparatus and a method for generating bandwidth extension output data 未知
公开(公告)号：AU2013257391A1
公开(公告)日：2013-11-28
申请号：AU2013257391
申请日：2013-11-11
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NEUENDORF MAX , GRILL BERNHARD , MULTRUS MARKUS , POPP HARALD , RETTELBACH NIKOLAUS , NAGEL FREDERIK , LOHWASSER MARKUS , GAYER MARC , JANDER MANUEL , BACIGALUPO VIRGILIO , KRAEMER ULRICH
IPC分类号： G10L21/02
摘要： Abstract: An apparatus (100) for generating bandwidth extension output data (102) for an audio signal (105) comprises a noise floor measurer (110), a signal energy characterizer (120) and a processor (130). The audio signal (105) comprises components in a first frequency band (105a) and components in a second frequency band (105b), the bandwidth extension output data (102) are adapted to control a synthesis of the components in the second frequency band (105b). The noise floor measurer (110) measures noise floor data (115) of the second frequency band (105b) for a time portion (T) of the audio signal (105). The signal energy characterizer (120) derives energy distribution data (125), the energy distribution data (125) characterizing an energy distribution in a spectrum of the time portion (T) of the audio signal (105). The processor (130) combines the noise floor data (115) and the energy distribution data (125) to obtain the bandwidth extension output data (102). 4856902 1 (GHMatters) P86095.AU.1 105a,b 115 noise floor measurer processor signal energy characterizer 105a,b 125 130

88. 发明专利

AU2009267531B2 An apparatus and a method for decoding an encoded audio signal 未知
公开(公告)号：AU2009267531B2
公开(公告)日：2013-01-10
申请号：AU2009267531
申请日：2009-06-23
申请人： FRAUNHOFER GES FORSCHUNG
发明人： RETTELBACH NIKOLAUS , GAYER MARC , BACIGALUPO VIRGILIO , LOHWASSER MARKUS , NEUENDORF MAX , MULTRUS MARKUS , POPP HARALD , KRAEMER ULRICH , JANDER MANUEL , GRILL BERNHARD , NAGEL FREDERIK
IPC分类号： G10L21/02
摘要： An apparatus for decoding (100) an encoded audio signal (102). A first decoder (110a) decodes a first portion (104a) in accordance with a first decoding algorithm for a first time portion of the encoded signal (102) to obtain a first decoded signal (114a). A second decoder (110b) decodes a second portion (104b) in accordance with a second decoding algorithm for a second time portion of the encoded signal (102) to obtain a second decoded signal (114b). A BWE module (130) has a controllable crossover frequency (fx) and is configured for performing a bandwidth extension algorithm using the first decoded signal (114a) and BWE parameters (106) for the first portion (104a), and for performing a bandwidth extension algorithm using the second decoded signal (114b) and the bandwidth extension parameters (106) for the second portion (104b). A controller (140) controls the crossover frequency (fx) for the BWE module (130) in accordance with a coding mode information (108).

89. 发明专利

HK1154112A1 APPARATUS AND METHOD FOR GENERATING A BANDWIDTH EXTENDED SIGNAL 未知
公开(公告)号：HK1154112A1
公开(公告)日：2012-04-20
申请号：HK11108364
申请日：2011-08-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NAGEL FREDERIK , DISCH SASCHA , NEUENDORF MAX , BAYER STEFAN , GAYER MARC , LOHWASSER MARKUS , RETTELBACH NIKOLAUS , KRAEMER ULRICH
IPC分类号： G10L21/038
摘要： An apparatus for generating a bandwidth extended signal from an input signal comprises a patch generator and a combiner. The input signal is represented for a first band by a first resolution data, and for a second band by a second resolution data, the second resolution being lower than the first resolution. The patch generator generates a first patch from the first band of the input signal according to a first patching algorithm and generates a second patch from the first band of the input signal according to a second patching algorithm. A spectral density of the second patch generated according to the second patching algorithm is higher than a spectral density of a first patch generated according to the first patching algorithm. The combiner combines the first patch, the second patch and the first band of the input signal to obtain the bandwidth extended signal. The apparatus for generating a bandwidth extended signal scales the input signal according to the first patching algorithm and according to the second patching algorithm or scales the first patch and the second patch, so that the bandwidth extended signal fulfills a spectral envelope criterion.

90. 发明专利

ES2376989T3 Codificación por transformada de audio utilizando corrección tonal 未知
公开(公告)号：ES2376989T3
公开(公告)日：2012-03-21
申请号：ES09728768
申请日：2009-03-23
申请人： FRAUNHOFER GES FORSCHUNG
发明人： EDLER BERND , DISCH SASCHA , GEIGER RALF , BAYER STEFAN , KRAEMER ULRICH , FUCHS GUILLAUME , NEUENDORF MAX , MULTRUS MARKUS , SCHULLER GERALD , POPP HARALD
IPC分类号： G10L19/02
摘要： Procesador de audio para generar una representación procesada de una señal de audio que tiene una secuencia de tramas, comprendiendo el procesador de audio: un muestreador adaptado para muestrear la señal de audio dentro de una primera y una segunda trama de la secuencia de tramas, siguiendo la segunda trama a la primera trama, utilizando el muestreador información sobre un contorno tonal de la primera y la segunda trama para derivar una primera representación muestreada y para muestrear la señal de audio dentro de la segunda y una tercera trama, siguiendo la tercera trama a la segunda trama en la secuencia de tramas utilizando la información sobre el contorno tonal de la segunda trama e información sobre un contorno tonal de la tercera trama para derivar una segunda representación muestreada; un calculador de ventanas de transformada adaptado para derivar una primera ventana de ajuste a escala para la primera representación muestreada y una segunda ventana de ajuste a escala para la segunda representación muestreada, dependiendo las ventanas de ajuste a escala del muestreo aplicado para derivar la primera representación muestreada o la segunda representación muestreada; y un divisor en ventanas adaptado para aplicar la primera ventana de ajuste a escala a la primera representación muestreada y la segunda ventana de ajuste a escala a la segunda representación muestreada para derivar una representación procesada de las tramas de audio primera, segunda y tercera de la señal de audio.

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