专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 发明专利

CA2730536A1 NOISE FILLER, NOISE FILLING PARAMETER CALCULATOR, METHOD FOR PROVIDING A NOISE FILLING PARAMETER, METHOD FOR PROVIDING A NOISE-FILLED SPECTRAL REPRESENTATION OF AN AUDIO SIGNAL, CORRESPONDING COMPUTER PROGRAM AND ENCODED AUDIO SIGNAL 未知
公开(公告)号：CA2730536A1
公开(公告)日：2010-01-14
申请号：CA2730536
申请日：2009-06-26
申请人： FRAUNHOFER GES FORSCHUNG
发明人： RETTELBACH NIKOLAUS , GRILL BERNHARD , FUCHS GUILLAUME , GEYERSBERGER STEFAN , MULTRUS MARKUS , POPP HARALD , HERRE JUERGEN , WABNIK STEFAN , SCHULLER GERALD , HIRSCHFELD JENS
IPC分类号： G10L19/00 , G10L19/02
摘要： A noise filler for providing a noise-filled spectral representation of an audio signal on the basis of an input spectral representation of the audio signal comprises a spectral region identifier configured to identify spectral regions of the input spectral representation spaced from non-zero spectral regions of the input spectral representation by at least one intermediate spectral region, to obtain identified spectral regions, and a noise inserter configured to selectively introduce noise into the identified spectral regions to obtain the noise-filled spectral representation of the audio signal. A noise filling parameter calculator for providing a noise filling parameter on the basis of a quantized spectral representation of an audio signal comprises a spectral region identifier, as mentioned above, and a noise value calculator configured to selectively consider quantization errors of the identified spectral regions for a calculation of the noise filling parameter. Accordingly, an encoded audio signal representation representing the audio signal can be obtained.

62. 发明专利

CA2730361A1 AUDIO ENCODER, AUDIO DECODER, METHODS FOR ENCODING AND DECODING AN AUDIO SIGNAL, AUDIO STREAM AND COMPUTER PROGRAM 未知
公开(公告)号：CA2730361A1
公开(公告)日：2010-01-14
申请号：CA2730361
申请日：2009-06-25
申请人： FRAUNHOFER GES FORSCHUNG
发明人： RETTELBACH NIKOLAUS , GRILL BERNHARD , FUCHS GUILLAUME , GEYRSBERGER STEFAN , MULTRUS MARKUS , POPP HARALD , HERRE JUERGEN , WABNIK STEFAN , SCHULLER GERALD , HIRSCHFELD JENS
IPC分类号： G10L19/00 , G10L19/02
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.

63. 发明专利

DE502005008041D1 未知
公开(公告)号：DE502005008041D1
公开(公告)日：2009-10-15
申请号：DE502005008041
申请日：2005-02-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： SCHULLER GERALD , WABNIK STEFAN , HIRSCHFELD JENS , LUTZKY MANFRED
IPC分类号： G10L19/00 , G10L19/02 , G10L19/26
摘要： Coding an audio signal of a sequence of audio values into a coded signal includes determining first and second listening thresholds for first and second blocks of audio values of the sequence of audio values; calculating versions of first second parameterizations of the parameterizable filter such that the transfer function thereof roughly corresponds to the inverse of the magnitude of the first and second listening thresholds, respectively; filtering a predetermined block of audio values of the sequence of audio values with the parameterizable filter using a predetermined parameterization which depends on the version of the second parameterization to obtain a block of filtered audio values corresponding to the predetermined block which is quantized; forming a difference between the versions of the first and second parameterizations; integrating information on, inter alias, the difference into the coded signal.

64. 发明专利

AU2007250308A1 Information signal coding 未知
公开(公告)号：AU2007250308A1
公开(公告)日：2007-11-22
申请号：AU2007250308
申请日：2007-02-28
申请人： FRAUNHOFER GES FORSCHUNG
发明人： HIRSCHFELD JENS , LUTZKY MANFRED , WABNIK STEFAN , KRAMER ULRICH , SCHULLER GERALD
IPC分类号： G10L19/02 , G10L19/00 , G10L19/035 , G10L19/06
摘要： A very coarse quantization exceeding the measure determined by the masking threshold without or only very little quality losses is enabled by quantizing not immediately the prefiltered signal, but a prediction error obtained by forward-adaptive prediction of the prefiltered signal. Due to the forward adaptivity, the quantizing error has no negative effect on the prediction on the decoder side.

65. 发明专利

ES2285551T3 ESQUEMA DE CODIFICACION PREDICTIVA. 未知
公开(公告)号：ES2285551T3
公开(公告)日：2007-11-16
申请号：ES04804095
申请日：2004-12-20
申请人： FRAUNHOFER GES FORSCHUNG
发明人： SCHULLER GERALD , LUTZKY MANFRED , KRAMER ULRICH , WABNIK STEFAN , HIRSCHFELD JENS
IPC分类号： G10L19/14 , G10L19/00 , G10L19/02 , G10L19/025 , G10L19/04 , G10L19/24
摘要： Procedimiento para codificar de manera predictiva una señal de información que incluye una secuencia de valores de información por medio de un algoritmo de predicción adaptativo, cuyos coeficientes (omegai) de predicción pueden inicializarse y que puede controlarse mediante un parámetro (lambda) de velocidad para operar con una primera velocidad de adaptación y una primera precisión de adaptación en caso de que el parámetro (lambda) de velocidad presente un primer valor y operar con una segunda velocidad de adaptación menor comparada con la primera y una segunda precisión de adaptación mayor comparada con la primera, en caso de que el parámetro (lambda) de velocidad presente un segundo valor, caracterizado por las siguientes etapas: A) inicializar (40) los coeficientes (omegai) de predicción; B) controlar (42) el algoritmo de predicción adaptativo para ajustar el parámetro (lambda) de velocidad al primer valor; C) codificar (44) valores de información sucesivos de la señal de información por medio del algoritmo de predicción adaptativo con el parámetro (lambda) de velocidad ajustado al primer valor, mientras que una duración predeterminada después de la etapa B) no haya transcurrido para codificar la primera parte de la señal de información; D) después de transcurrir de la duración predeterminada después de la etapa B), controlar (50) el algoritmo de predicción adaptativo para ajustar el parámetro (lambda) de velocidad al segundo valor; y E) codificar (44) valores de información de la señal de información después de los valores de información codificados en la etapa C) por medio del algoritmo de predicción adaptativo con el parámetro (lambda) de velocidad ajustado al segundo valor para codificar una segunda parte de la señal de información después de la primera parte.

66. 发明专利

BRPI0506627A 未知
公开(公告)号：BRPI0506627A
公开(公告)日：2007-05-02
申请号：BRPI0506627
申请日：2005-02-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： SCHULLER GERALD , WABNIK STEFAN , HIRSCHFELD JENS , FIESEL WOLFGANG
IPC分类号： G10L19/032 , G10L19/26
摘要： Quantizing an information signal of a sequence of information values includes frequency-selective filtering the sequence of information values to obtain a sequence of filtered information values and quantizing the filtered information values to obtain a sequence of quantized information values by means of a quantizing step function which maps the filtered information values to the quantized information values and the course of which is steeper below a threshold information value than above the threshold information value.

67. 发明专利

AU2005213770A1 Audio encoding 未知
公开(公告)号：AU2005213770A1
公开(公告)日：2005-08-25
申请号：AU2005213770
申请日：2005-02-10
申请人： FRAUNHOFER GES FORSCHUNG
发明人： WABNIK STEFAN , SCHULLER GERALD , HIRSCHFELD JENS , LUTZKY MANFRED
IPC分类号： G10L19/00 , G10L19/02 , G10L19/26
摘要： Coding an audio signal of a sequence of audio values into a coded signal includes determining first and second listening thresholds for first and second blocks of audio values of the sequence of audio values; calculating versions of first second parameterizations of the parameterizable filter such that the transfer function thereof roughly corresponds to the inverse of the magnitude of the first and second listening thresholds, respectively; filtering a predetermined block of audio values of the sequence of audio values with the parameterizable filter using a predetermined parameterization which depends on the version of the second parameterization to obtain a block of filtered audio values corresponding to the predetermined block which is quantized; forming a difference between the versions of the first and second parameterizations; integrating information on, inter alias, the difference into the coded signal.

68. 发明专利

DE102004007185B3 Predictive coding method for information signals using adaptive prediction algorithm with switching between higher adaption rate and lower prediction accuracy and lower adaption rate and higher prediction accuracy 未知
公开(公告)号：DE102004007185B3
公开(公告)日：2005-06-30
申请号：DE102004007185
申请日：2004-02-13
申请人： FRAUNHOFER GES FORSCHUNG
发明人： SCHULLER GERALD , LUTZKY MANFRED , KRAEMER ULRICH , WABNIK STEFAN , HIRSCHFELD JENS
IPC分类号： G10L19/00 , G10L19/02 , G10L19/025 , G10L19/04 , G10L19/14 , G10L19/24
摘要： The predictive coding method has successive information values of an information signal coded via an adaptive prediction algorithm which has initially selected prediction parameters and which is controlled via an adaption rate parameter, such that when the latter has a first value it operates with a first adaption rate and first prediction accuracy and when the adaption rate parameter has a second value it operates with the lower adaption rate and a higher adaption accuracy. The coding method provides switching between a higher adaption rate and a lower prediction accuracy and a lower adaption rate and a higher prediction accuracy for coding different parts of an information signal. Also included are Independent claims for the following: (A) a predictive coding device; (B) a decoding method for a predictive coded information signal; (C) a decoding device for a predictive coded information signal; (D) a computer program for a predictive coding method or a method for decoding a predictive coded information signal.

69. 发明专利

BR122021017287B1 Esquema de codificação/decodificação de áudio com taxa de bits baixa com pré-processamento comum 未知
公开(公告)号：BR122021017287B1
公开(公告)日：2022-02-22
申请号：BR122021017287
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.

70. 发明专利

BRPI0709450B1 codificação de sinal de informação 未知
公开(公告)号：BRPI0709450B1
公开(公告)日：2020-02-04
申请号：BRPI0709450
申请日：2007-02-28
申请人： FRAUNHOFER GES FORSCHUNG
发明人： HIRSCHFELD JENS , KRÄMER ULRICH , LUTZKY MANFRED , SCHULLER GERALD , WABNIK STEFAN
IPC分类号： G10L19/06 , G10L19/00 , G10L19/035
摘要： ificaçao de sinal de informaçao quantização muito grosseira que ultrapassa a medida determinada pelo limite de mascaramento, sem ou somente com muito pouca perda de qualidade, é permitida quantizando não imediatamente o sinal pré-filtrado, mas um erro de predição obtido pela predição adaptativa para frente do sinal pré-filtrado. devido à adaptatividade para frente, o erro de quantização não tem efeito negativo na predição no lado do decodificador.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式