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82. 发明专利

CA2727883C AUDIO ENCODING/DECODING SCHEME HAVING A SWITCHABLE BYPASS 未知
公开(公告)号：CA2727883C
公开(公告)日：2014-09-02
申请号：CA2727883
申请日：2009-07-06
申请人： FRAUNHOFER GES FORSCHUNG , VOICEAGE CORP
发明人： GRILL BERNHARD , BAYER STEFAN , FUCHS GUILLAUME , GEYERSBERGER STEFAN , GEIGER RALF , HILPERT JOHANNES , KRAEMER ULRICH , LECOMTE JEREMIE , MULTRUS MARKUS , NEUENDORF MAX , POPP HARALD , RETTELBACH NIKOLAUS , LEFEBVRE ROCH , BESSETTE BRUNO , LAPIERRE JIMMY , SALAMI REDWAN , GOURNAY PHILIPPE
IPC分类号： G10L19/00 , G10L19/04 , G10L19/12
摘要： An apparatus for encoding comprises a first domain Converter (510), a switchable bypass (50), a second domain Converter (410), a first processor (420) and a second processor (520) to obtain an encoded audio signal having different signal portions represented by coded data in different domains, which have been coded by different coding algorithms. Corresponding decoding stages in the decoder together with a bypass for bypassing a domain Converter allow the generation of a decoded audio signal with high quality and low bit rate.

83. 发明专利

AU2010309838B2 Audio signal encoder, audio signal decoder, method for encoding or decoding an audio signal using an aliasing-cancellation 未知
公开(公告)号：AU2010309838B2
公开(公告)日：2014-05-08
申请号：AU2010309838
申请日：2010-10-19
申请人： DOLBY INT AB , FRAUNHOFER GES FORSCHUNG , KONINL PHILIPS ELECTRONICS NV , VOICEAGE CORP
发明人： BESSETTE BRUNO , NEUENDORF MAX , GEIGER RALF , GOURNAY PHILIPPE , LEFEBVRE ROCH , GRILL BERNHARD , LECOMTE JEREMIE , BAYER STEFAN , RETTELBACH NIKOLAUS , VILLEMOES LARS , SALAMI REDWAN , BRINKER ALBERTUS C DEN
IPC分类号： G10L19/00 , G10L19/02 , G10L19/03 , G10L19/20
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.

84. 发明专利

DK1979895T3 FREMGANGSMÅDE OG INDRETNING TIL EFFEKTIVT AT SKJULE RAMMESLETNING I TALE-CODECS 未知
公开(公告)号：DK1979895T3
公开(公告)日：2013-11-18
申请号：DK06840572
申请日：2006-12-28
申请人： VOICEAGE CORP
发明人： VAILLANCOURT TOMMY , GOURNAY PHILIPPE , JELINEK MILAN , SALAMI REDWAN
IPC分类号： G10L19/00

85. 发明专利

HK1156143A1 AUDIO ENCODING/DECODING SCHEME HAVING A SWITCHABLE BYPASS 未知
公开(公告)号：HK1156143A1
公开(公告)日：2012-06-01
申请号：HK11110282
申请日：2011-09-29
申请人： FRAUNHOFER GES FORSCHUNG , VOICEAGE CORP
发明人： GRILL BERNHARD , BAYER STEFAN , FUCHS GUILLAUME , GEYERSBERGER STEFAN , GEIGER RALF , HILPERT JOHANNES , KRAEMER ULRICH , LECOMTE JEREMIE , MULTRUS MARKUS , NEUENDORF MAX , POPP HARALD , RETTELBACH NIKOLAUS , LEFEBVRE ROCH , BESSETTE BRUNO , LAPIERRE JIMMY , SALAMI REDWAN , GOURNAY PHILIPPE
IPC分类号： G10L20060101
摘要： An apparatus for encoding comprises a first domain converter (510), a switchable bypass (50), a second domain converter (410), a first processor (420) and a second processor (520) to obtain an encoded audio signal having different signal portions represented by coded data in different domains, which have been coded by different coding algorithms. Corresponding decoding stages in the decoder together with a bypass for bypassing a domain converter allow the generation of a decoded audio signal with high quality and low bit rate.

86. 发明专利

CO6351832A2 CODIFICADOR Y DECODIFICADOR DE AUDIO PARA CODIFICAR MARCOS DE SEÑALES DE AUDIO MUESTREADAS 未知
公开(公告)号：CO6351832A2
公开(公告)日：2011-12-20
申请号：CO11015746
申请日：2011-02-10
申请人： FRAUNHOFER GES EV , VOICEAGE CORP
发明人： LECOMTE JEREMIE , GOURNAY PHILIPPE , RETTELBACH NIKOLAUS , MULTRUS MARKUS , BAYER STEFAN
IPC分类号： G10L19/14
摘要： Un codificador de audio (100) adaptado para codificar marcos de una señal de audio muestreada para obtener marcos codificados, donde un marco comprende un número de muestras de audio del dominio del tiempo, que comprende una etapa de análisis de codificación predictiva (110) para determinar información sobre los coeficientes de un filtro de síntesis e información sobre el marco de dominio de predicción con base en un marco de muestras de audio. El codificador de audio (100) además comprende un transformador del dominio de la frecuencia (120) para transformar un marco de muestras de audio al dominio de la frecuencia para obtener un espectro de marcos y un tomador de decisiones del dominio de codificación (130) para decidir si los datos codificados para un marco se basan en la información sobre los coeficientes y en la información sobre el marco de dominio de predicción, o si se basan en el espectro de marcos. Más aún, el codificador de audio (100) comprende un controlador (140) para determinar una información de un coeficiente de conmutación cuando el tomador de decisiones del dominio de codificación decida que los datos codificados de un marco en curso se basan en la información de los coeficientes y la información sobre el marco de dominio de predicción cuando los datos codificados de un marco previo han sido codificados con base en un espectro de marcos previo, y un codificador reductor de la redundancia (150) para codificar la información sobre el marco de dominio de predicción, la información sobre los coeficientes, la información sobre el coeficiente de conmutación y/o el espectro de marcos.Fig. 1

87. 发明专利

AU2009301358A8 Multi-resolution switched audio encoding/decoding scheme 未知
公开(公告)号：AU2009301358A8
公开(公告)日：2011-05-26
申请号：AU2009301358
申请日：2009-10-07
申请人： FRAUNHOFER GES FORSCHUNG , VOICEAGE CORP
发明人： NEUENDORF MAX , BAYER STEFAN , LECOMTE JEREMIE , FUCHS GUILLAUME , ROBILLIARD JULIEN , RETTELBACH NIKOLAUS , NAGEL FREDERIK , GEIGER RALF , MULTRUS MARKUS , GRILL BERNHARD , GOURNAY PHILIPPE , SALAMI REDWAN
IPC分类号： G01L19/02 , G10L19/022 , G10L19/14 , G10L19/24

88. 发明专利

CA2730195A1 AUDIO ENCODER AND DECODER FOR ENCODING AND DECODING FRAMES OF SAMPLED AUDIO SIGNAL 未知
公开(公告)号：CA2730195A1
公开(公告)日：2010-01-14
申请号：CA2730195
申请日：2009-06-04
申请人： FRAUNHOFER GES FORSCHUNG , VOICEAGE CORP
发明人： GEIGER RALF , GRILL BERNHARD , BESSETTE BRUNO , GOURNAY PHILIPPE , FUCHS GUILLAUME , MULTRUS MARKUS , NEUENDORF MAX , SCHULLER GERALD
IPC分类号： G06F17/14 , G10L19/02 , G10L19/08 , G10L19/14 , G10L19/20
摘要： An audio encoder (10) adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame comprises a number of time domain audio samples. The audio encoder (10) comprises a predictive coding analysis stage (12) for determining information on coefficients of a synthesis filter and a prediction domain frame based on a frame of audio samples. The audio encoder (10) further comprises a time-aliasing introducing transformer (14) for transforming overlapping prediction domain frames to the frequency domain to obtain prediction domain frame spectra, wherein the time-aliasing introducing transformer (14) is adapted for transforming the overlapping prediction domain frames in a critically-sampled way. Moreover, the audio encoder (10) comprises a redundancy reducing encoder (16) for encoding the prediction domain frame spectra to obtain the encoded frames based on the coefficients and the encoded prediction domain frame spectra.

89. 发明专利

CA2729665E VARIABLE BIT RATE LPC FILTER QUANTIZING AND INVERSE QUANTIZING DEVICE AND METHOD 未知
公开(公告)号：CA2729665E
公开(公告)日：2010-01-14
申请号：CA2729665
申请日：2009-07-10
申请人： VOICEAGE CORP
发明人： BESSETTE BRUNO , GOURNAY PHILIPPE , SALAMI REDWAN
IPC分类号： G10L19/038 , G10L19/087 , G10L19/12 , G10L19/26
摘要： A device and a method for quantizing a LPC filter in the form of an input vector in a quantization domain, comprises a calculator of a first-stage approximation of the input vector, a subtractor of the first-stage approximation from the input vector to produce a residual vector, a calculator of a weighting function from the first-stage approximation, a warper of the residual vector with the weighting function, and a quantizer of the weighted residual vector to supply a quantized weighted residual vector. A device and a method for inverse quantizing of a LPC filter, comprises means for receiving coded indices representative of a first-stage approximation of a vector representative of the LPC filter in a quantization domain and of a quantized weighted residual version of the vector, a calculator of an inverse weighting fmiction from the first-stage approximation, an inverse quantizer of the quantized weighted residual version of the vector to produce a weighted residual vector, a multiplier of the weighted residual vector by the inverse weighting function to produce a residual vector, and an adder of the first-stage approximation with the residual vector to produce the vector representative of the LPC filter in the quantization domain.

90. 发明专利

AU2009267555A1 Audio encoder and decoder for encoding and decoding frames of sampled audio signal 未知
公开(公告)号：AU2009267555A1
公开(公告)日：2010-01-14
申请号：AU2009267555
申请日：2009-06-04
申请人： FRAUNHOFER GES FORSCHUNG , VOICEAGE CORP
发明人： SCHULLER GERALD , BESSETTE BRUNO , MULTRUS MARKUS , NEUENDORF MAX , GEIGER RALF , GOURNAY PHILIPPE , FUCHS GUILLAUME , GRILL BERNHARD
IPC分类号： G06F17/14 , G10L19/02 , G10L19/08 , G10L19/14 , G10L19/20
摘要： An audio encoder (10) adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame comprises a number of time domain audio samples. The audio encoder (10) comprises a predictive coding analysis stage (12) for determining information on coefficients of a synthesis filter and an excitation frame based on a frame of audio samples, the excitation frame comprising samples of an excitation signal for the synthesis filter. The audio encoder (10) further comprises a time-aliasing introducing transformer (14) for transforming overlapping excitation frames to the frequency domain to obtain excitation frame spectra, wherein the time-aliasing introducing transformer (14) is adapted for transforming the overlapping excitation frames in a critically-sampled way. Moreover, the audio encoder (10) comprises a redundancy reducing encoder (16) for encoding the excitation frame spectra to obtain the encoded frames based on the coefficients and the encoded excitation frame spectra.

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