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1. 发明申请

WO2012025429A1 REDUCTION OF SPURIOUS UNCORRELATION IN FM RADIO NOISE 审中-公开
标题翻译：减少FM无线电噪声中的不寻常的不符合
公开(公告)号：WO2012025429A1
公开(公告)日：2012-03-01
申请号：PCT/EP2011/064077
申请日：2011-08-16
申请人： DOLBY INTERNATIONAL AB , ENGDEGARD, Jonas , PURNHAGEN, Heiko , SEHLSTROM, Leif
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , SEHLSTROM, Leif
IPC分类号： H04B1/16 , G10L19/00 , H04S1/00
CPC分类号： H04R5/04 , G10L19/008 , H04B1/1676 , H04S1/007
摘要： The document relates to audio signal processing, in particular to a system and a corresponding method for improving an audio signal of an FM stereo radio receiver, in this context, one aspect relates to the estimation of noise in a received side signal and the compensation of such noise in parametric stereo parameters. A system for generating a parametric stereo parameter from a two-channel audio signal is described. The two-channel audio signal is presentable as a mid signal and side signal representative of a corresponding left and right audio signal. The system comprises a noise estimation stage configured to determine an impact factor characteristic for the noise of the side signal; and a parametric stereo parameter estimation stage configured to determine the parametric stereo parameter; wherein the determining is based on the two-channel audio signal and the impact factor.
摘要翻译：本文件涉及音频信号处理，具体涉及用于改进FM立体声无线电接收机的音频信号的系统和相应方法，在本上下文中，一个方面涉及接收侧信号中的噪声估计和这样的噪声参数立体声参数。描述了一种用于从双声道音频信号产生参数立体声参数的系统。双声道音频信号可以作为表示相应的左和右音频信号的中间信号和侧面信号呈现。该系统包括噪声估计级，其被配置为确定侧信号的噪声的影响因子特性; 以及被配置为确定所述参数立体声参数的参数立体声参数估计级; 其中所述确定基于所述双声道音频信号和所述影响因子。

2. 发明申请

WO2011124621A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124621A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055374
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
IPC分类号： G10L19/00 , H04B1/66
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel,the first frequency-domain representation of the second input channel and a complex prediction coefficient. The method comprises applying independent bandwidth limits for the input channels.
摘要翻译：本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。该方法包括对输入通道应用独立的带宽限制。

3. 发明申请

WO2011124473A1 AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION 审中-公开
标题翻译：音频编码器，音频解码器和使用复杂预测处理多通道音频信号的相关方法
公开(公告)号：WO2011124473A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/054485
申请日：2011-03-23
申请人： FRAUNHOFER-GESELLSCHAFT DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
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 , G10L19/04
CPC分类号： G10L19/04 , G10L19/008
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.
摘要翻译：音频编码器和音频解码器基于两个音频通道（201,202）的组合，以获得作为中间信号的第一组合信号（204）和可以使用预测侧信号导出的残留信号（205）从中间信号导出。基于优化目标（208），将第一组合信号和预测残差信号与由优化器（207）导出的预测信息（206）一起编码（209）并写入（212）到数据流（213）中。解码器使用预测残差信号，第一组合信号和预测信息来导出解码的第一信道信号和解码的第二信道信号。在编码器示例或解码器示例中，可以应用实 - 虚变换来估计第一组合信号的频谱的虚部。为了计算在推导预测残差信号中使用的预测信号，将实值第一组合信号乘以复数预测信息的实部，并将第一组合信号的估计虚部乘以假想部分复杂的预测信息。

4. 发明申请

WO2006048204A1 MULTI PARAMETRISATION BASED MULTI-CHANNEL RECONSTRUCTION 审中-公开
标题翻译：多参数多通道重构
公开(公告)号：WO2006048204A1
公开(公告)日：2006-05-11
申请号：PCT/EP2005/011587
申请日：2005-10-28
申请人： CODING TECHNOLOGIES AB , KONINKLIJKE PHILIPS ELECTRONICS N.V. , VILLEMOES, Lars , KJÖRLING, Kristofer , PURNHAGEN, Heiko , RÖDEN, Jonas , BREEBAART, Jeroen , HOTHO, Gerard
发明人： VILLEMOES, Lars , KJÖRLING, Kristofer , PURNHAGEN, Heiko , RÖDEN, Jonas , BREEBAART, Jeroen , HOTHO, Gerard
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/04 , H04S2420/03
摘要： A Multi-channel synthesiser for generating at least three output channels (110, 111, 112) using an input signal having at least one base channel, the base channel being derived from the original multi-channel signal (101, 102, 103), the input signal further including at least two different up-mixing parameters, and an up-mixer mode indication (1005) indicating, in a first state that a first up-mixing rule is to be performed, and, indicating, in a second state, that a different second up-mixing rule is to be performed, uses an up-mixer for up-mixing the at least one base channel using the at least two different up-mixing parameters based on the first or the second up-mixing rule in response to the up-mixer mode indication (1005) so that the at least three output channels (110, 111, 112) are obtained.
摘要翻译：一种多通道合成器，用于使用具有至少一个基本通道的输入信号来产生至少三个输出通道（110,111,112），所述基本通道从原始多通道信号（101,102,103）导出，所述输入信号还包括至少两个不同的上混参数，以及上混合模式指示（1005），在第一状态下指示要执行第一加混规则，并且以第二状态要执行不同的第二上调规则，使用上混合器，用于使用基于第一或第二上混合规则的至少两个不同的上混参数来上混合至少一个基本信道响应于上混频器模式指示（1005），使得获得至少三个输出通道（110,111,112）。

5. 发明申请

WO2004097795A3 ADAPTIVE VOICE ENHANCEMENT FOR LOW BIT RATE AUDIO CODING 审中-公开
公开(公告)号：WO2004097795A3
公开(公告)日：2004-11-11
申请号：PCT/EP2004/004608
申请日：2004-04-30
申请人： CODING TECHNOLOGIES AB , PURNHAGEN, Heiko
发明人： PURNHAGEN, Heiko
IPC分类号： G10L19/14
摘要： The present invention provides improvements to prior art audio codecs applied to voice signals like human speech. These improvements are accomplished by adaptively processing (501) the signal in the decoder to reduce perceived distortion introduced by the coding process, primarily for voiced parts of the audio signal. The signal processing is adaptively controlled by signal analysis in the encoder or in the decoder. The invention can be applied as post-processing in a general audio codec or can be applied as intermediate processing step in a general audio codec that utilizes high frequency reconstruction (HFR) techniques.

6. 发明申请

WO2012025431A2 CONCEALMENT OF INTERMITTENT MONO RECEPTION OF FM STEREO RADIO RECEIVERS 审中-公开
标题翻译： FM立体声无线电接收机的间接单声道接收
公开(公告)号：WO2012025431A2
公开(公告)日：2012-03-01
申请号：PCT/EP2011/064084
申请日：2011-08-16
申请人： DOLBY INTERNATIONAL AB , SEHLSTROM, Leif , PURNHAGEN, Heiko , ENGDEGARD, Jonas
发明人： SEHLSTROM, Leif , PURNHAGEN, Heiko , ENGDEGARD, Jonas
IPC分类号： G10L19/00
CPC分类号： H04R5/00 , G10L19/005 , G10L19/008 , G10L21/0364 , H04B1/1676 , H04H40/81
摘要： The present invention relates to audio signal processing. In particular, it relates to a method and system for reliably concealing intermittent mono reception of FM stereo radio receivers. The system comprises a parametric stereo parameter estimation stage configured to determine a first parametric stereo parameter based on a first frame of the received two-channel audio signal. The system further comprises a concealment detection stage configured to determine an energy of a side signal within the first signal frame; determine a number of following successive signal frames during which the energy of the side signal drops from a value above the high threshold to a value below a low threshold; determine that the two-channel audio signal following the first signal frame is a forced mono signal if the number of successive signal frames is below a frame threshold; and determine the parametric stereo parameter based on the first parametric stereo parameter.
摘要翻译：本发明涉及音频信号处理。特别涉及用于可靠地隐藏FM立体声无线电接收机的间歇单声道接收的方法和系统。该系统包括参数立体声参数估计级，其被配置为基于所接收的双声道音频信号的第一帧来确定第一参数立体声参数。所述系统还包括隐藏检测级，被配置为确定所述第一信号帧内的侧信号的能量; 确定随后的连续信号帧的数量，在此期间，侧信号的能量从高于高阈值的值下降到低于低阈值的值; 如果连续信号帧的数量低于帧阈值，则确定跟随第一信号帧的双声道音频信号是强制单声道信号; 并根据第一参数立体声参数确定参数立体声参数。

7. 发明申请

WO2010125104A1 APPARATUS FOR PROVIDING ONE OR MORE ADJUSTED PARAMETERS FOR A PROVISION OF AN UPMIX SIGNAL REPRESENTATION ON THE BASIS OF A DOWNMIX SIGNAL REPRESENTATION, AUDIO SIGNAL DECODER, AUDIO SIGNAL TRANSCODER, AUDIO SIGNAL ENCODER, AUDIO BITSTREAM, METHOD AND COMPUTER PROGRAM USING AN OBJECT-RELATED PARAMETRIC INFORMATION 审中-公开
标题翻译：提供一个或多个调整参数的装置，用于提供基于下标信号表示，音频信号解码器，音频信号转换器，音频信号编码器，音频比特，方法AN的UPMIX信号表示
公开(公告)号：WO2010125104A1
公开(公告)日：2010-11-04
申请号：PCT/EP2010/055717
申请日：2010-04-28
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , FRIEDRICH-ALEXANDER-UNIVERSITÄT ERLANGEN-NÜRNBERG , HERRE, Jürgen , HOELZER, Andreas , TERENTIEV, Leonid , KASTNER, Thorsten , FALCH, Cornelia , PURNHAGEN, Heiko , ENGDEGARD, Jonas
发明人： HERRE, Jürgen , HOELZER, Andreas , TERENTIEV, Leonid , KASTNER, Thorsten , FALCH, Cornelia , PURNHAGEN, Heiko , ENGDEGARD, Jonas
IPC分类号： G10L19/00 , G10L19/14
CPC分类号： G10L19/008 , G10L19/20
摘要： An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information comprises a parameter adjuster. The parameter adjuster is configured to receive one or more input parameters and to provide, on the basis thereof, one or more adjusted parameters. The parameter adjuster is configured to provide the one or more adjusted parameters in dependence on the one or more input parameters and the object-related parametric information, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for input parameters deviating from optimal parameters by more than a predetermined deviation.
摘要翻译：基于降混信号表示和对象相关参数信息提供用于提供上混合信号表示的一个或多个调整参数的装置包括参数调整器。参数调整器被配置为接收一个或多个输入参数并且在其基础上提供一个或多个调整的参数。参数调整器被配置为根据一个或多个输入参数和对象相关参数信息来提供一个或多个经调整的参数，使得由使用非最优参数引起的上混信号表示的失真减少至少对于偏离最佳参数的输入参数大于预定偏差。

8. 发明申请

WO2010105926A2 ADVANCED STEREO CODING BASED ON A COMBINATION OF ADAPTIVELY SELECTABLE LEFT/RIGHT OR MID/SIDE STEREO CODING AND OF PARAMETRIC STEREO CODING 审中-公开
标题翻译：基于自适应可选左/右或中/侧立体声编码和参数立体声编码组合的高级立体声编码
公开(公告)号：WO2010105926A2
公开(公告)日：2010-09-23
申请号：PCT/EP2010052866
申请日：2010-03-05
申请人： DOLBY INT AB , PURNHAGEN HEIKO , CARLSSON PONTUS , KJOERLING KRISTOFER
发明人： PURNHAGEN HEIKO , CARLSSON PONTUS , KJOERLING KRISTOFER
IPC分类号： G10L19/00
CPC分类号： G10L19/002 , G10L19/008 , G10L19/18 , H04S3/02 , H04S5/00 , H04S5/005 , H04S5/02 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.
摘要翻译：该应用涉及音频编码器和解码器系统。编码器系统的实施例包括用于基于立体声信号来生成下混合信号和残余信号的下混合级。另外，编码器系统包括用于确定参数立体声参数（诸如声道间强度差和声道间互相关）的参数确定级。优选地，参数化立体声参数是时间和频率变化的。此外，编码器系统包括变换阶段。变换级通过基于缩混信号和残差信号执行变换来生成伪左/右立体声信号。伪立体声信号由感知立体声编码器处理。对于立体声编码，可以选择左/右编码或中/侧编码。优选地，左/右立体声编码和中/立体声编码之间的选择是时间和频率变化的。

9. 发明申请

WO2006108456A1 APPARATUS AND METHOD FOR GENERATING MULTI-CHANNEL SYNTHESIZER CONTROL SIGNAL AND APPARATUS AND METHOD FOR MULTI-CHANNEL SYNTHESIZING 审中-公开
标题翻译：用于产生多通道合成器控制信号的装置和方法以及用于多通道合成的装置和方法
公开(公告)号：WO2006108456A1
公开(公告)日：2006-10-19
申请号：PCT/EP2006/000455
申请日：2006-01-19
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , CODING TECHNOLOGIES AB , KONINKLIJKE PHILIPS ELECTRONICS N.V. , NEUSINGER, Matthias , HERRE, Juergen , DISCH, Sascha , PURNHAGEN, Heiko , KJOERLING, Kristofer , ENGDEGARD, Jonas , BREEBAART, Jeroen , SCHUIJERS, Erik , OOMEN, Werner
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： G10L19/14 , H04S5/00
CPC分类号： G10L19/26 , G10L19/008 , G10L2019/0012 , H04S3/008
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.
摘要翻译：在编码器侧，分析多声道音频输入信号以获得平滑控制信息，该平滑控制信息将被解码器侧多声道音频合成用于平滑量化的发送参数或从量化的发送参数导出的值提供了改进的主观音频质量，特别是用于缓慢移动的点源和具有诸如快速移动的正弦曲线之类的音调材料的快速移动的点源。

10. 发明申请

WO2005101371A1 METHOD FOR REPRESENTING MULTI-CHANNEL AUDIO SIGNALS 审中-公开
标题翻译：用于表示多通道音频信号的方法
公开(公告)号：WO2005101371A1
公开(公告)日：2005-10-27
申请号：PCT/EP2005/003849
申请日：2005-04-12
申请人： CODING TECHNOLOGIES AB , PURNHAGEN, Heiko , VILLEMOES, Lars , ENGDEGARD, Jonas , RÖDÉN, Jonas , KJÖRLING, Kristofer
发明人： PURNHAGEN, Heiko , VILLEMOES, Lars , ENGDEGARD, Jonas , RÖDÉN, Jonas , KJÖRLING, Kristofer
IPC分类号： G10L19/00
CPC分类号： H04R5/00 , G10L19/008 , G10L19/0204 , G10L19/032 , G10L19/167 , G10L19/26 , H04S3/02 , H04S5/00 , H04S2400/01 , H04S2400/03
摘要： A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter (r1), a first coherence parameter, or a first inter-channel time difference between a first channel pair and a second bal-ance parameter (r2), or a second coherence parameter, or a second inter-channel time difference parameter between a second channel pair are calculated. This set of parameters is the parameter representation of the original signals. The first channel pair (102, 104) has two channels, which are different from two channels of a second channel pair (102, 104, 103). Furthermore, each channel of the two chan-nel pairs is one of the original channels, or a weighted combination of the original channels, and the first channel pair and the second channel pair include information on the three original channels. For multi-channel reconstruction purposes, the parameters are used in addition to down-mixing information to generate a selectable number of out-put channels in a scalable fashion.
摘要翻译：具有至少三个原始信道的多信道输入信号由多信道信号的参数表示来表示。第一平衡参数（r1），第一相干参数或第一通道对和第二平衡参数（r2）之间的第一通道间时间差或第二相干参数或第二通道间时间计算第二通道对之间的差参数。这组参数是原始信号的参数表示。第一信道对（102,104）具有与第二信道对（102,104,103）的两个信道不同的两个信道。此外，两个通道对的每个通道是原始通道之一或原始通道的加权组合，并且第一通道对和第二通道对包括关于三个原始通道的信息。对于多通道重建的目的，除了降混信息之外还使用参数以便以可缩放的方式生成可选数量的输出通道。

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