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21. 发明专利

CA2566992C APPARATUS AND METHOD FOR GENERATING MULTI-CHANNEL SYNTHESIZER CONTROL SIGNAL AND APPARATUS AND METHOD FOR MULTI-CHANNEL SYNTHESIZING 未知
公开(公告)号：CA2566992C
公开(公告)日：2013-12-24
申请号：CA2566992
申请日：2006-01-19
申请人： FRAUNHOFER GES FORSCHUNG , CODING TECH AB , KONINKL PHILIPS ELECTRONICS NV
发明人： NEUSINGER MATTHIAS , HERRE JUERGEN , DISCH SASCHA , PURNHAGEN HEIKO , KJOERLING KRISTOFER , ENGDEGARD JONAS , BREEBAART JEROEN , SCHUIJERS ERIK , OOMEN WERNER
IPC分类号： G10L19/008 , H04S3/00
摘要： On an encoder-side, a multi-channel audio input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel audio synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.

22. 发明专利

AU2010209869B2 Apparatus, method and computer program for upmixing a downmix audio signal 未知
公开(公告)号：AU2010209869B2
公开(公告)日：2013-07-11
申请号：AU2010209869
申请日：2010-01-12
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NEUSINGER MATTHIAS , ROBILLIARD JULIEN , HILPERT JOHANNES
IPC分类号： G10L19/00 , H04B1/66
摘要： An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels comprises an upmixer configured to apply temporally variable upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The apparatus also comprises a parameter interpolator, wherein the parameter interpolator is configured to obtain one or more temporally interpolated upmix parameters to be used by the upmixer on the basis of a first complex-valued upmix parameter and a subsequent second complex-valued upmix parameter. The parameter interpolator is configured to separately interpolate between a magnitude value of the first complex-valued upmix parameter and a magnitude value of the second complex-valued upmix parameter, and between a phase value of the first complex-valued upmix parameter and a phase value of the second complex-valued upmix parameter, to obtain the one or more temporally interpolated upmix parameters. A respective method can be implemented, for example, as a computer program.

23. 发明专利

HK1166174A1 APPARATUS, METHOD AND COMPUTER PROGRAM FOR UPMIXING A DOWNMIX AUDIO SIGNAL USING A PHASE VALUE SMOOTHING 未知
公开(公告)号：HK1166174A1
公开(公告)日：2012-10-19
申请号：HK12106712
申请日：2012-07-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： NEUSINGER MATTHIAS , ROBILLIARD JULIEN , HILPERT JOHANNES
IPC分类号： G10L20060101
摘要： An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels comprises an upmixer and a parameter determinator. The upmixer is configured to apply temporally variable upmix parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal, wherein the temporally variable upmix parameters comprise temporally variable smoothened phase values. The parameter determinator is configured to obtain one or more temporally smoothened upmix parameters for usage by the upmixer on the basis of a quantized upmix parameter input information. The parameter determinator is configured to combine a scaled version of a previous smoothened phase value with a scaled version of an input phase information using a phase change limitation algorithm, to determine a current smoothened phase value on the basis of the previous smoothened phase value and the phase input information.

24. 发明专利

CA2804907A1 AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION 未知
公开(公告)号：CA2804907A1
公开(公告)日：2011-10-13
申请号：CA2804907
申请日：2011-03-23
申请人： DOLBY INT AB , FRAUNHOFER GES FORSCHUNG
发明人： PURNHAGEN HEIKO , CARLSSON PONTUS , VILLEMOES LARS , ROBILLARD JULIEN , NEUSINGER MATTHIAS , HELMRICH CHRISTIAN , HILPERT JOHANNES , RETTELBACH NIKOLAUS , DISCH SASCHA , EDLER BERND
IPC分类号： G10L19/00 , G10L19/008 , G10L19/04
摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.

25. 发明专利

AU2006301612B2 Temporal and spatial shaping of multi-channel audio signals 未知
公开(公告)号：AU2006301612B2
公开(公告)日：2010-07-22
申请号：AU2006301612
申请日：2006-08-31
申请人： FRAUNHOFER GES FORSCHUNG , KONINKLIJKE PHILIPS ELECTRONICS NV
发明人： BREEBAART JEROEN , NEUSINGER MATTHIAS , DISCH SASCHA , HERRE JUERGEN , HOTHO GERARD
IPC分类号： G10L19/00 , H04S3/00
摘要： A selected channel of a multi-channel signal which is represented by frames composed from sampling values having a high time resolution can be encoded with higher quality when a wave form parameter representation representing a wave form of an intermediate resolution representation of the selected channel is derived, the wave form parameter representation including a sequence of intermediate wave form parameters having a time resolution lower than the high time resolution of the sampling values and higher than a time resolution defined by a frame repetition rate. The wave form parameter representation with the intermediate resolution can be used to shape a reconstructed channel to retrieve a channel having a signal envelope close to that one of the selected original channel. The time scale on which the shaping is performed is shorter than the time scale of a framewise processing, thus enhancing the quality of the reconstructed channel. On the other hand, the shaping time scale is larger than the time scale of the sampling values, significantly reducing the amount of data needed by the wave form parameter representation.

26. 发明专利

CA2725793A1 APPARATUS AND METHOD FOR GENERATING AUDIO OUTPUT SIGNALS USING OBJECT BASED METADATA 未知
公开(公告)号：CA2725793A1
公开(公告)日：2010-01-21
申请号：CA2725793
申请日：2009-07-06
申请人： FRAUNHOFER GES FORSCHUNG
发明人： SCHREINER STEPHAN , FIESEL WOLFGANG , NEUSINGER MATTHIAS , HELLMUTH OLIVER , SPERSCHNEIDER RALPH
IPC分类号： H04S3/00
摘要： An apparatus for generating at least one audio output signal representing a superposition of at least two different audio objects comprises a processor for processing an audio input signal to provide an object representation of the audio input signal, where this object representation can be generated by a parametrically guided approximation of original objects using an object downmix signal. An object manipulator individually manipulates objects using audio object based metadata referring to the individual audio objects to obtain manipulated audio objects. The manipulated audio objects are mixed using an object mixer for finally obtaining an audio output signal having one or several channel signals depending on a specific rendering setup.

27. 发明专利

AU2006233504B2 Apparatus and method for generating multi-channel synthesizer control signal and apparatus and method for multi-channel synthesizing 未知
公开(公告)号：AU2006233504B2
公开(公告)日：2008-07-31
申请号：AU2006233504
申请日：2006-01-19
申请人： DOLBY INT AB , FRAUNHOFER GES FORSCHUNG , KONINKLIJKE PHILIPS ELECTRONICS NV
发明人： ENGDEGARD JONAS , OOMEN WERNER , BREEBAART JEROEN , DISCH SASCHA , HERRE JUERGEN , SCHUIJERS ERIK , PURNHAGEN HEIKO , KJOERLING KRISTOFER , NEUSINGER MATTHIAS
IPC分类号： G10L19/14 , H04S5/00
摘要： An apparatus and a method for generating a multi-channel synthesizer control signal, a multi-channel synthesizer, a method of generating an output signal from an input signal and a machine-readable storage medium are provided. On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.

28. 发明专利

CA2625213A1 TEMPORAL AND SPATIAL SHAPING OF MULTI-CHANNEL AUDIO SIGNALS 未知
公开(公告)号：CA2625213A1
公开(公告)日：2007-04-19
申请号：CA2625213
申请日：2006-08-31
申请人： FRAUNHOFER GES FORSCHUNG , KONINKL PHILIPS ELECTRONICS NV
发明人： HERRE JUERGEN , NEUSINGER MATTHIAS , BREEBAART JEROEN , HOTHO GERARD , DISCH SASCHA
IPC分类号： G10L19/00 , H04S3/00
摘要： A selected channel of a multi-channel signal which is represented by frames composed from sampling values having a high time resolution can be encoded with higher quality when a wave form parameter representation representing a wave form of an intermediate resolution representation of the selected channel is derived, the wave form parameter representation including a sequence of intermediate wave form parameters having a time resolution lower than the high time resolution of the sampling values and higher than a time resolution defined by a frame repetition rate. The wave form parameter representation with the intermediate resolution can be used to shape a reconstructed channel to retrieve a channel having a signal envelope close to that one of the selected original channel. The time scale on which the shaping is performed is shorter than the time scale of a framewise processing, thus enhancing the quality of the reconstructed channel. On the other hand, the shaping time scale is larger than the time scale of the sampling values, significantly reducing the amount of data needed by the wave form parameter representation.

29. 发明专利

AU2006301612A1 Temporal and spatial shaping of multi-channel audio signals 未知
公开(公告)号：AU2006301612A1
公开(公告)日：2007-04-19
申请号：AU2006301612
申请日：2006-08-31
申请人： KONINKL PHILIPS ELECTRONICS NV , FRAUNHOFER GES FORSCHUNG
发明人： BREEBAART JEROEN , NEUSINGER MATTHIAS , DISCH SASCHA , HERRE JURGEN , HOTHO GERARD
IPC分类号： G10L19/00 , H04S3/00
摘要： A selected channel of a multi-channel signal which is represented by frames composed from sampling values having a high time resolution can be encoded with higher quality when a wave form parameter representation representing a wave form of an intermediate resolution representation of the selected channel is derived, the wave form parameter representation including a sequence of intermediate wave form parameters having a time resolution lower than the high time resolution of the sampling values and higher than a time resolution defined by a frame repetition rate. The wave form parameter representation with the intermediate resolution can be used to shape a reconstructed channel to retrieve a channel having a signal envelope close to that one of the selected original channel. The time scale on which the shaping is performed is shorter than the time scale of a framewise processing, thus enhancing the quality of the reconstructed channel. On the other hand, the shaping time scale is larger than the time scale of the sampling values, significantly reducing the amount of data needed by the wave form parameter representation.

30. 发明专利

ES2901758T3 Codificación y decodificación de audio usando un procesador de dominio de frecuencia, un procesador de dominio de tiempo y un procesador cruzado para inicialización del procesador de dominio de tiempo 未知
公开(公告)号：ES2901758T3
公开(公告)日：2022-03-23
申请号：ES19165957
申请日：2015-07-24
申请人： FRAUNHOFER GES FORSCHUNG
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
摘要： Codificador de audio para la codificación de una señal de audio, que comprende una banda alta y una banda baja, comprendiendo el codificador de audio: un primer procesador de codificación (600) para la codificación de una primera porción de señal de audio en un dominio de frecuencia, teniendo la primera porción de la señal de audio asociada en ella una primera velocidad de muestreo, donde el primer procesador de codificación (600) comprende: un convertidor de frecuencia de tiempo (602) para convertir la primera porción de señal de audio en una representación de un dominio de frecuencia que tiene líneas espectrales hasta una frecuencia máxima de la primera porción de señal de audio, donde la frecuencia máxima de la porción de señal de audio es inferior o igual a la mitad de la primera velocidad de muestreo y al menos un cuarto de la primera velocidad de muestreo o superior; un codificador espectral (606) para la codificación de la representación del dominio de frecuencia para obtener una representación espectral codificada de la primera porción de la señal de audio que es una primera porción de señal codificada; un segundo procesador de codificación (610) para la codificación de una segunda porción de señal de audio en un dominio de tiempo para obtener una segunda porción de señal codificada, siendo la segunda porción de la señal de audio diferente de la primera porción de la señal de audio, donde el segundo procesador de codificación (610) comprende un convertidor de velocidad de muestreo (900) para convertir la segunda porción de la señal de audio a una segunda representación de velocidad de muestreo que tiene una segunda velocidad de muestreo, siendo la segunda velocidad de muestreo inferior a la primera velocidad de muestreo, donde la segunda representación de la velocidad de muestreo no incluye la banda alta de la señal de audio; codificando un codificador de banda baja de dominio de tiempo (910) para el dominio de tiempo la segunda representación de la velocidad de muestreo; y un codificador de extensión de ancho de banda de dominio de tiempo (920) para codificar paramétricamente la banda alta de la señal de audio; un procesador cruzado (700) para calcular, a partir de la representación espectral codificada de la primera porción de señal de audio, datos de inicialización del segundo procesador de codificación (610), de modo que el segundo procesador de codificación (610) se inicialice para codificar la segunda porción de señal de audio inmediatamente después de la primera porción de señal de audio en tiempo en la señal de audio, donde el procesador cruzado (700) está configurado para usar una transformada en tiempo de frecuencia realizando adicionalmente un muestreo descendente desde la primera velocidad de muestreo a la segunda velocidad de muestreo seleccionando una porción de banda baja de la representación de dominio de frecuencia junto con un tamaño de transformada reducido para obtener los datos de inicialización del segundo procesador de codificación (610); un controlador (620) configurado para analizar la señal de audio y para determinar, la porción de la señal de audio que es la primera porción de señal de audio codificada por el primer procesador de codificación (600) y la porción de la señal de audio que es la segunda porción de la señal de audio codificada por el segundo procesador de codificación (610); y un formador de señal codificada (630) para formar una señal de audio codificada que comprende la primera porción de la señal codificada para la primera porción de la señal de audio y la segunda porción de la señal codificada para la segunda porción de la señal de audio.

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