专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP4375996A2 APPARATUS AND METHOD FOR ENCODING OR DECODING AN AUDIO SIGNAL USING A TRANSIENT-LOCATION DEPENDENT OVERLAP 审中-公开
公开(公告)号：EP4375996A2
公开(公告)日：2024-05-29
申请号：EP24167580.0
申请日：2014-02-20
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： HELMRICH, Christian , LECOMTE, Jérémie , MARKOVIC, Goran , SCHNELL, Markus , EDLER, Bernd , REUSCHL, Stefan
IPC分类号： G10L19/02
CPC分类号： G10L19/022 , G10L19/0212
摘要： A decoder for decoding an audio or image signal comprising a sequence of blocks of converted windowed samples and associated window information (160) identifying a specific window function for a block out of at least three different window functions, comprises: a processor (156) for providing a sequence of blocks of spectral values; a controllable converter (158) for converting the sequence of blocks of spectral values into a time domain representation using an overlap-add processing, wherein the controllable converter (158) is controlled by the window information to apply window functions indicated by the window information to the corresponding block to calculate a decoded audio or image signal, wherein the window is selected from a group of at least three windows comprising a first window (201) having a first overlap length (203), a second window (215) having a second overlap length (218), and a third window (224) having a third overlap length (229) or having no overlap, wherein the first overlap length (203) is greater than the second overlap length (218), and wherein the second overlap length (218) is greater than the third overlap length (229) or greater than an overlap of zero.

2. 发明公开

EP4369335A1 NOISE FILLING IN MULTICHANNEL AUDIO CODING 审中-公开
公开(公告)号：EP4369335A1
公开(公告)日：2024-05-15
申请号：EP24167391.2
申请日：2014-07-18
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： LUIS VALERO, Maria , HELMRICH, Christian , HILPERT, Johannes
IPC分类号： G10L19/008 , G10L19/028 , G10L19/035
CPC分类号： G10L19/028 , G10L19/008 , G10L19/035
摘要： In multichannel audio coding, an improved coding efficiency is achieved by the following measure: the noise filling of zero-quantized scale factor bands is performed using noise filling sources other than artificially generated noise or spectral replica. In particular, the coding efficiency in multichannel audio coding may be rendered more efficient by performing the noise filling based on noise generated using spectral lines from a previous frame of, or a different channel of the current frame of, the multichannel audio signal.

5. 发明授权

EP3017448B1 APPARATUS, METHOD AND COMPUTER PROGRAM FOR DECODING AN ENCODED AUDIO SIGNAL 有权
公开(公告)号：EP3017448B1
公开(公告)日：2020-07-08
申请号：EP14739811.9
申请日：2014-07-15
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： DISCH, Sascha , GEIGER, Ralf , HELMRICH, Christian , NAGEL, Frederik , NEUKAM, Christian , SCHMIDT, Konstantin , FISCHER, Michael
IPC分类号： G10L21/0388 , G10L19/02

6. 发明授权

EP3417452B1 APPARATUS AND METHOD FOR STEREO FILLING IN MULTICHANNEL CODING 有权
公开(公告)号：EP3417452B1
公开(公告)日：2019-12-25
申请号：EP17704485.6
申请日：2017-02-14
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： DICK, Sascha , HELMRICH, Christian , RETTELBACH, Nikolaus , SCHUH, Florian , FUEG, Richard , NAGEL, Frederik
IPC分类号： G10L19/008 , G10L19/028

7. 发明公开

EP3471093A1 NOISE FILLING IN PERCEPTUAL TRANSFORM AUDIO CODING 有权
公开(公告)号：EP3471093A1
公开(公告)日：2019-04-17
申请号：EP18206224.0
申请日：2014-01-28
申请人： FRAUNHOFER-GESELLSCHAFT zur Förderung der angewandten Forschung e.V.
发明人： DISCH, Sascha , GAYER, Marc , HELMRICH, Christian , MARKOVIC, Goran , LUIS VALERO, Maria
IPC分类号： G10L19/028
摘要： Noise filling in perceptual transform audio codecs is improved by performing the noise filling with a spectrally global tilt, rather than in a spectrally flat manner.

8. 发明授权

EP2951814B1 LOW-FREQUENCY EMPHASIS FOR LPC-BASED CODING IN FREQUENCY DOMAIN 有权
标题翻译：爱德华兹·贝松
公开(公告)号：EP2951814B1
公开(公告)日：2017-05-10
申请号：EP14701984.8
申请日：2014-01-28
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： DÖHLA, Stefan , GRILL, Bernhard , HELMRICH, Christian , RETTELBACH, Nikolaus
IPC分类号： G10L19/02 , G10L19/26 , G10L19/08
CPC分类号： G10L19/087 , G10L19/0212 , G10L19/06 , G10L19/08 , G10L19/16 , G10L19/26 , G10L19/265
摘要： The invention provides an audio encoder including a combination of a linear predictive coding filter having a plurality of linear predictive coding coefficients and a time-frequency converter, wherein the combination is configured to filter and to convert a frame of the audio signal into a frequency domain in order to output a spectrum based on the frame and on the linear predictive coding coefficients; a low frequency emphasizer configured to calculate a processed spectrum based on the spectrum, wherein spectral lines of the processed spectrum representing a lower frequency than a reference spectral line are emphasized; and a control device configured to control the calculation of the processed spectrum by the low frequency emphasizer depending on the linear predictive coding coefficients of the linear predictive coding filter.
摘要翻译：本发明提供一种音频编码器，其包括具有多个线性预测编码系数的线性预测编码滤波器和时间 - 频率转换器的组合，其中该组合被配置为滤波并将该音频信号的帧转换为频域以便基于帧和线性预测编码系数输出频谱; 配置为基于频谱计算处理频谱的低频增强器，其中强调表示比参考频谱线更低频率的处理频谱的频谱线; 以及控制装置，被配置为根据线性预测编码滤波器的线性预测编码系数来控制低频增强器对经处理频谱的计算。

9. 发明公开

EP3117430A1 ENCODER, DECODER AND METHOD FOR ENCODING AND DECODING 审中-公开
标题翻译： CODIERER，DECODIERER UND VERFAHREN ZUR CODIERUNG UND DECODIERUNG
公开(公告)号：EP3117430A1
公开(公告)日：2017-01-18
申请号：EP15707636.5
申请日：2015-03-03
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
发明人： BÄCKSTRÖM, Tom , FISCHER, Johannes , HELMRICH, Christian
IPC分类号： G10L19/08
CPC分类号： G10L19/167 , G10L19/0212 , G10L19/028 , G10L19/032 , G10L19/08
摘要： An encoder for encoding an audio signal into a data stream comprises a predictor, a factorizer, a transformer and a quantize and encode stage. The predictor is configured to analyze the audio signal in order to obtain prediction coefficients describing a spectral analog of the audio signal or a fundamental frequency of the audio signal and subject the audio signal to an analysis filter function dependent on the prediction coefficients in order to output a residual signal of the audio signal. The factorizer is configured to apply a matrix factorization onto an audiocorrelation or covariance matrix of synthesis filter function defined by the prediction coefficients to obtain factorized matrices. The transformer is configured to transform the residual signal based on the factorized matrices to obtain a transformed residual signal. The quantize and decode stage is configured to quantize the transformed residual signal to obtain a quantized transformed residual signal or an encoded quantized transformed residual signal.
摘要翻译：用于将音频信号编码成数据流的编码器包括预测器，分解器，变压器和量化和编码级。预测器被配置为分析音频信号，以便获得描述音频信号的频谱模拟或音频信号的基频的预测系数，并根据预测系数对音频信号进行分析滤波器功能，以输出音频信号的残留信号。因子分解器被配置为将矩阵分解应用于由预测系数定义的合成滤波函数的音频相关或协方差矩阵，以获得因子化矩阵。变压器被配置为基于因式分解矩阵来变换残差信号以获得经变换的残差信号。量化和解码级被配置为量化变换的残差信号以获得量化的变换残差信号或编码的量化变换残差信号。

10. 发明公开

EP3025331A1 MULTI-CHANNEL AUDIO DECODER, MULTI-CHANNEL AUDIO ENCODER, METHODS AND COMPUTER PROGRAM USING A RESIDUAL-SIGNAL-BASED ADJUSTMENT OF A CONTRIBUTION OF A DECORRELATED SIGNAL 有权转让
标题翻译：多声道音频解码器，多路音频编码器，方法和计算机程序WITH A去相关的信号的贡献的复位信号基础的适应
公开(公告)号：EP3025331A1
公开(公告)日：2016-06-01
申请号：EP14739486.0
申请日：2014-07-17
申请人： Fraunhofer Gesellschaft zur Förderung der angewandten Forschung E.V.
发明人： DICK, Sascha , HELMRICH, Christian , HILPERT, Johannes , HÖLZER, Andreas
IPC分类号： G10L19/008 , G10L19/20
CPC分类号： G10L19/008 , G10L19/20 , G10L19/22 , H04S1/007 , H04S3/02 , H04S2400/03 , H04S2420/07
摘要： A multi-channel audio decoder for providing at least two output audio signals on the basis of an encoded representation is configured to perform a weighted combination of a downmix signal, a decorrelated signal and a residual signal, to obtain one of the output audio signals. The multi-channel audio decoder is configured to determine a weight describing a contribution of the decorrelated signal in the weighted combination in dependence on the residual signal. A multi-channel audio encoder for providing an encoded representation of a multi-channel audio signal is configured to obtain a downmix signal on the basis of the multi-channel audio signal, to provide parameters describing dependencies between the channels of the multi-channel audio signal, and to provide a residual signal. The multi-channel audio encoder is configured to vary an amount of residual signal included into the encoded representation in dependence on the multi-channel audio signal.

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