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1. 发明申请

WO2006005390A1 APPARATUS AND METHOD FOR GENERATING A MULTI-CHANNEL OUTPUT SIGNAL 审中-公开
标题翻译：用于产生多通道输出信号的装置和方法
公开(公告)号：WO2006005390A1
公开(公告)日：2006-01-19
申请号：PCT/EP2005/005199
申请日：2005-05-12
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , AGERE SYSTEMS INC. , HERRE, Jürgen , FALLER, Christof , DISCH, Sascha , HILPERT, Johannes
发明人： HERRE, Jürgen , FALLER, Christof , DISCH, Sascha , HILPERT, Johannes
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S3/00 , H04S2420/03
摘要： An apparatus for generating a multi-channel output signal performs a center channel cancellation to obtain improved base channels for reconstructing left-side output channels or right-side output channels. In particular, the apparatus includes a cancellation channel calculator (20) for calculating a cancellation channel using information related to the original center channel available at the decoder. The device furthermore includes a combiner (22) for combining a transmission channel with the cancellation channel. Finally, the apparatus includes a reconstructor (26) for generating the multi-channel output signal. Due to the center channel cancellation, the channel reconstructor (26) not only uses a different base channel for reconstructing the center channel but also uses base channels different from the transmission channels for reconstructing left and right output channels which have a reduced or even completely cancelled influence of the original center channel.
摘要翻译：用于产生多通道输出信号的装置执行中心信道消除以获得用于重建左侧输出信道或右侧输出信道的改进的基本信道。特别地，该装置包括消除信道计算器（20），用于使用与解码器可用的原始中心信道相关的信息来计算消除信道。该装置还包括用于将传输信道与消除信道组合的组合器（22）。最后，该装置包括用于产生多声道输出信号的重构器（26）。由于中心信道消除，信道重建器（26）不仅使用不同的基本信道来重构中心信道，而且还使用与传输信道不同的基本信道来重构具有减少甚至完全取消的左右输出信道影响原中心频道。

2. 发明申请

WO2006045373A1 DIFFUSE SOUND ENVELOPE SHAPING FOR BINAURAL CUE CODING SCHEMES AND THE LIKE 审中-公开
公开(公告)号：WO2006045373A1
公开(公告)日：2006-05-04
申请号：PCT/EP2005/009784
申请日：2005-09-12
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , AGERE SYSTEMS INC. , ALLAMANCHE, Eric , DISCH, Sascha , FALLER, Christof , HERRE, Jürgen
发明人： ALLAMANCHE, Eric , DISCH, Sascha , FALLER, Christof , HERRE, Jürgen
IPC分类号： H04S3/00 , G10L19/00
CPC分类号： G10L19/008 , H04S3/02
摘要： An input audio signal having an input temporal envelope is converted into an output audio signal having an output temporal envelope. The input temporal envelope of the input audio signal is characterized. The input audio signal is processed to generate a processed audio signal, wherein the processing de-correlates the input audio signal. The processed audio signal is adjusted based on the characterized input temporal envelope to generate the output audio signal, wherein the output temporal envelope substantially matches the input temporal envelope.
摘要翻译：具有输入时间包络的输入音频信号被转换成具有输出时间包络的输出音频信号。表征输入音频信号的输入时间包络。输入音频信号被处理以产生经处理的音频信号，其中该处理使输入音频信号去相关。经处理的音频信号基于表征的输入时间包络被调整以产生输出音频信号，其中输出时间包络基本上与输入的时间包络相匹配。

3. 发明申请

WO2006045371A1 INDIVIDUAL CHANNEL TEMPORAL ENVELOPE SHAPING FOR BINAURAL CUE CODING SCHEMES AND THE LIKE 审中-公开
标题翻译：个性通道时间包装形式
公开(公告)号：WO2006045371A1
公开(公告)日：2006-05-04
申请号：PCT/EP2005/009618
申请日：2005-09-07
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , AGERE SYSTEMS INC. , ALLAMANCHE, Eric , DISCH, Sascha , FALLER, Christof , HERRE, Juergen
发明人： ALLAMANCHE, Eric , DISCH, Sascha , FALLER, Christof , HERRE, Juergen
IPC分类号： G10L19/02 , G10L19/00
CPC分类号： G10L19/008
摘要： At an audio encoder, cue codes are generated for one or more audio channels, wherein an envelope cue code is generated by characterizing a temporal envelope in an audio channel. At an audio decoder, E transmitted audio channel(s) are decoded to generate C playback audio channels, where C>=Eo1. Received cue codes include an envelope cue code corresponding to a characterized temporal envelope of an audio channel corresponding to the transmitted channel(s). One or more transmitted channel(s) are upmixed to generate one or more upmixed channels. One or more playback channels are synthesized by applying the cue codes to the one or more upmixedchannels, wherein the envelope cue code is applied to an upmixed channel or a synthesized signal to adjust a temporal envelope of the synthesized signal based on the characterized temporal envelope such that the adjusted temporal envelope substantially matches the characterized temporal envelope.
摘要翻译：在音频编码器中，为一个或多个音频通道生成提示码，其中通过表征音频通道中的时间包络来产生包络线索码。在音频解码器中，对E个发送的音频信道进行解码以产生C个回放音频信道，其中C> = Eo1。接收的提示码包括与对应于所发送的频道的音频信道的特征化时间包络对应的信封提示码。一个或多个传输的信道被混合以产生一个或多个上混频道。通过将提示码应用于一个或多个上混合信道来合成一个或多个播放频道，其中，包络提示码被应用于上混合信道或合成信号，以基于表征的时间包络来调整合成信号的时间包络，调整后的时间包络基本上与特征化的时间包络相匹配。

4. 发明申请

WO2006072270A1 COMPACT SIDE INFORMATION FOR PARAMETRIC CODING OF SPATIAL AUDIO 审中-公开
标题翻译：空间音频参考编码的紧凑信息
公开(公告)号：WO2006072270A1
公开(公告)日：2006-07-13
申请号：PCT/EP2005/010595
申请日：2005-09-30
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , AGERE SYSTEMS INC. , HERRE, Jürgen , FALLER, Christof
发明人： HERRE, Jürgen , FALLER, Christof
IPC分类号： G10L19/00 , H04S3/00
CPC分类号： G10L19/008
摘要： At an audio encoder, cue codes are generated for one or more audio channels, wherein a combined cue code (e.g., a combined inter-channel correlation (ICC) code) is generated by combining two or more estimated cue codes, each estimated cue code estimated from a group of two or more channels. At an audio decoder, E transmitted audio channel(s) are decoded to generate C playback audio channels. Received cue codes include a combined cue code (e.g., a combined ICC code). One or more transmitted channel(s) are upmixed to generate one or more upmixed channels. One or more playback channels are synthesized by applying the cue codes to the one or more upmixed channels, wherein two or more derived cue codes are derived from the combined cue code, and each derived cue code is applied to generate two or more synthesized channels.
摘要翻译：在音频编码器处，为一个或多个音频通道生成提示码，其中通过组合两个或多个估计的提示码来生成组合的提示码（例如，组合的信道间相关（ICC）码），每个估计的提示码从一组两个或多个渠道估计。在音频解码器处，E个发送的音频信道被解码以产生C个回放音频信道。接收的提示码包括组合的提示码（例如，组合的ICC码）。一个或多个传输的信道被混合以产生一个或多个上混频道。通过将提示码应用于一个或多个上混通道来合成一个或多个回放通道，其中从组合提示码导出两个或多个派生提示码，并且应用每个派生的提示码以生成两个或多个合成通道。

5. 发明申请

WO2005069274A1 APPARATUS AND METHOD FOR CONSTRUCTING A MULTI-CHANNEL OUTPUT SIGNAL OR FOR GENERATING A DOWNMIX SIGNAL 审中-公开
标题翻译：用于构造多通道输出信号或产生下行信号的装置和方法
公开(公告)号：WO2005069274A1
公开(公告)日：2005-07-28
申请号：PCT/EP2005/000408
申请日：2005-01-17
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , AGERE SYSTEMS INC. , HERRE, Jürgen , FALLER, Christof
发明人： HERRE, Jürgen , FALLER, Christof
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S3/02 , H04S2420/03
摘要： The apparatus for constructing a multi-channel output signal using an input signal and parametric side information, the input signal including the first input channel and the second input channel derived from an original multi-channel signal, and the parametric side information describing interrelations between channels of the multi-channel original signal uses base channels for synthesizing (324) first and second output channels on one side of an assumed listener position, which are different from each other. The base channels are different from each other because of a coherence measure. Coherence between the base channels (for example the left and the left surround reconstructed channel) is reduced by calculating (322) a base channel for one of those channels by a combination of the input channels, the combination being determined by the coherence measure. Thus, a high subjective quality of the reconstruction can be obtained because of an approximated original front/back coherence.
摘要翻译：用于使用输入信号和参数侧信息构造多通道输出信号的装置，包括从原始多通道信号导出的第一输入通道和第二输入通道的输入信号以及描述通道之间的相互关系的参数侧信息多通道原始信号使用基本通道来合成（324）彼此不同的假定收听者位置一侧的第一和第二输出声道。由于一致性测量，基本通道彼此不同。通过通过输入通道的组合计算（322）这些通道中的一个通道的基本通道来减小基本通道（例如左和左环绕重构通道）之间的相干性，该组合由相干性测量确定。因此，由于近似的原始前/后相干性，可以获得重建的高主观质量。

6. 发明申请

WO2007009548A1 CONCEPT FOR BRIDGING THE GAP BETWEEN PARAMETRIC MULTI-CHANNEL AUDIO CODING AND MATRIXED-SURROUND MULTI-CHANNEL CODING 审中-公开
标题翻译：概念参与参数多通道音频编码和基准环绕多通道编码
公开(公告)号：WO2007009548A1
公开(公告)日：2007-01-25
申请号：PCT/EP2006/005971
申请日：2006-06-21
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , AGERE SYSTEMS INC. , HILPERT, Johannes , FALLER, Christof , LINZMEIER, Karsten , SPERSCHNEIDER, Ralph
发明人： HILPERT, Johannes , FALLER, Christof , LINZMEIER, Karsten , SPERSCHNEIDER, Ralph
IPC分类号： G10L19/00 , H04S3/02
CPC分类号： G06F12/0815 , G10L19/008 , H04S3/02
摘要： The purpose of the invention is to bridge the gap between pa-rametric multi-channel audio coding and matrixed-surround multi-channel coding by gradually improving the sound of an up-mix signal while raising the bit-rate consumed by the side-information starting from 0 up to the bit-rates of the parametric methods. More specifically, it provides a method of flexibly choosing an "operating point" somewhere between matrixed-surround (no side-information, limited audio qual-ity) and fully parametric reconstruction (full side-information rate required, good quality). This operating point can be chosen dynamically (i.e. varying over time) and in response to the permissible side-information rate, as it is dictated by the individual application.
摘要翻译：本发明的目的是通过逐渐改善上混合信号的声音来弥合参数多声道音频编码和矩阵环绕多声道编码之间的差距，同时提高侧信息消耗的比特率从0开始到参数方法的比特率。更具体地说，它提供了在矩阵环绕（无侧信息，有限音频质量）和完全参数重建（所需的全侧信息速率，良好质量）之间的某处的灵活选择“操作点”的方法。该操作点可以动态地选择（即随着时间而变化）并且响应于由个体应用所规定的允许的侧信息速率。

7. 发明申请

WO2011104146A1 APPARATUS FOR GENERATING AN ENHANCED DOWNMIX SIGNAL, METHOD FOR GENERATING AN ENHANCED DOWNMIX SIGNAL AND COMPUTER PROGRAM 审中-公开
标题翻译：用于产生增强的下行信号的装置，用于产生增强的下行信号和计算机程序的方法
公开(公告)号：WO2011104146A1
公开(公告)日：2011-09-01
申请号：PCT/EP2011/052246
申请日：2011-02-15
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , KÜCH, Fabian , HERRE, Jürgen , FALLER, Christof , TOURNERY, Christophe
发明人： KÜCH, Fabian , HERRE, Jürgen , FALLER, Christof , TOURNERY, Christophe
IPC分类号： G10L19/00
CPC分类号： H04R5/00 , G10L19/008 , G10L19/265 , G10L21/02
摘要： An apparatus for generating an enhanced downmix signal on the basis of a multi-channel microphone signal comprises a spatial analyzer configured to compute a set of spatial cue parameters comprising a direction information describing a direction-of-arrival of a direct sound, a direct sound power information and a diffuse sound power information on the basis of the multi-channel microphone signal. The apparatus also comprises a filter calculator for calculating enhancement filter parameters in dependence on the direction information describing the direction-of-arrival of the direct sound, in dependence on the direct sound power information and in dependence on the diffuse sound power information. The apparatus also comprises a filter for filtering the microphone signal, or a signal derived therefrom, using the enhancement filter parameters, to obtain the enhanced downmix signal.
摘要翻译：一种用于基于多声道麦克风信号产生增强的下混信号的装置包括：空间分析器，被配置为计算一组空间提示参数，所述空间提示参数包括描述直接声音的到达方向的方向信息，直接声音功率信息和基于多声道麦克风信号的漫射声功率信息。该装置还包括一个滤波器计算器，用于根据直接声功率信息和依赖于扩散声功率信息，根据描述直接声音到达方向的方向信息计算增强滤波器参数。该装置还包括用于过滤麦克风信号的滤波器或使用增强滤波器参数从其导出的信号，以获得增强的降混信号。

8. 发明申请

WO2005094125A1 FREQUENCY-BASED CODING OF AUDIO CHANNELS IN PARAMETRIC MULTI-CHANNEL CODING SYSTEMS 审中-公开
标题翻译：参数多通道编码系统中频率通道的基于频率的编码
公开(公告)号：WO2005094125A1
公开(公告)日：2005-10-06
申请号：PCT/US2005/005605
申请日：2005-02-23
申请人： AGERE SYSTEMS INC. , FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , FALLER, Christof , HERRE, Juergen
发明人： FALLER, Christof , HERRE, Juergen
IPC分类号： H04S3/00
CPC分类号： H04S3/00 , G10L19/008 , H04S2420/03
摘要： For a multi-channel audio signal, parametric coding is applied to different subsets of audio input channels for different frequency regions. For example, for a 5.1 surround sound signal having five regular channels and one low-frequency (LFE) channel, binaural cue coding (BCC) can be applied to all six audio channels for sub-bands at or below a specified cut-off frequency, but to only five audio channels (excluding the LFE channel) for sub-bands above the cut-off frequency. Such frequency-based coding of channels can reduce the encoding and decoding processing loads and/or size of the encoded audio bitstream relative to parametric coding techniques that are applied to all input channels over the entire frequency range.
摘要翻译：对于多声道音频信号，参数编码被应用于不同频率区域的音频输入通道的不同子集。例如，对于具有五个常规频道和一个低频（LFE）频道的5.1环绕声信号，可以将双耳提示编码（BCC）应用于等于或低于指定截止频率的子频带的所有六个音频通道，但是对于截止频率以上的子频带，只有五个音频通道（不包括LFE通道）。信道的这种基于频率的编码可以相对于在整个频率范围上应用于所有输入信道的参数编码技术来减少编码和解码处理负载和/或编码音频比特流的大小。

9. 发明申请

WO2009092522A1 APPARATUS AND METHOD FOR COMPUTING CONTROL INFORMATION FOR AN ECHO SUPPRESSION FILTER AND APPARATUS AND METHOD FOR COMPUTING A DELAY VALUE 审中-公开
标题翻译：用于计算ECHO抑制过滤器的控制信息的装置和方法以及计算延迟值的装置和方法
公开(公告)号：WO2009092522A1
公开(公告)日：2009-07-30
申请号：PCT/EP2009/000123
申请日：2009-01-12
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , KÜCH, Fabian , KALLINGER, Markus , FALLER, Christof , FAVROT, Alexis
发明人： KÜCH, Fabian , KALLINGER, Markus , FALLER, Christof , FAVROT, Alexis
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An embodiment of an apparatus (200) for computing control information for a suppression filter (210) for filtering a second audio signal to suppress an echo based on a first audio signal includes a computation means (220) having a value determination means (230) for determining at least one energy-related value for a band-pass signal of at least two temporally successive data blocks of at least one signal of a group of signals. The computation means (220) further includes a mean value determination means (250) for determining at least one mean value of the at least one determined energy-related value for the band-pass signal. The computation means (220) further includes a modification means (260) for modifying the at least one energy-related value for the band-pass signal on the basis of the determined mean value for the band-pass signal. The computation means (220) ' further includes a control information computation means (270) for computing the control information for the suppression filter (210) on the basis of the at least one modified energy-related value.
摘要翻译：用于计算用于滤波第二音频信号以抑制基于第一音频信号的回波的抑制滤波器（210）的控制信息的装置（200）的实施例包括具有值确定装置（230）的计算装置（220）用于为一组信号的至少一个信号的至少两个时间上连续的数据块的带通信号确定至少一个能量相关值。计算装置（220）还包括一个平均值确定装置（250），用于确定所述至少一个确定的带通信号的能量相关值的平均值。计算装置（220）还包括修改装置（260），用于根据确定的带通信号的平均值修改带通信号的至少一个能量相关值。计算装置（220）还包括控制信息计算装置（270），用于根据至少一个经修改的能量相关值计算抑制滤波器（210）的控制信息。

10. 发明申请

WO2012055687A1 ECHO SUPPRESSION COMPRISING MODELING OF LATE REVERBERATION COMPONENTS 审中-公开
标题翻译：包含最新版本组件建模的ECHO抑制
公开(公告)号：WO2012055687A1
公开(公告)日：2012-05-03
申请号：PCT/EP2011/067486
申请日：2011-10-06
申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V. , KUECH, Fabian , SCHMIDT, Markus , FALLER, Christof , FAVROT, Alexis
发明人： KUECH, Fabian , SCHMIDT, Markus , FALLER, Christof , FAVROT, Alexis
IPC分类号： G10L21/02 , H04M9/08
CPC分类号： H04R3/002 , G10L2021/02082 , H04M9/085
摘要： An apparatus (200) for computing filter coefficients (H[k,m]) for an adaptive filter (210) is disclosed. The adaptive filter is used for filtering a microphone signal (140, 430) so as to suppress an echo due to a loudspeaker signal (130, 420). The apparatus (200) comprises: an echo decay modeling means (465) for modeling a decay behavior of an acoustic environment (120) and for providing a corresponding echo decay parameter (τ; α m ); and computing means (270; 370) for computing the filter coefficients (H[k,m]) of the adaptive filter (210) on the basis of the echo decay parameter (τ; α m ). A corresponding method comprises: providing echo decay parameters (τ; Ĝ[k,m]; α m ) determined by means of an echo decay modeling means (465); and computing the filter coefficients (H[k,m]) of the adaptive filter (210) on the basis of the echo decay parameters (τ; α m ).
摘要翻译：公开了一种用于计算自适应滤波器（210）的滤波器系数（H [k，m]）的装置（200）。自适应滤波器用于对麦克风信号（140,430）进行滤波，以便抑制由扬声器信号（130,420）引起的回波。所述装置（200）包括：回波衰减建模装置（465），用于对声学环境（120）的衰减行为进行建模并提供对应的回波衰减参数（t; am）; 以及用于基于回波衰减参数（t; am）计算自适应滤波器（210）的滤波器系数（H [k，m]）的计算装置（270; 370）。相应的方法包括：提供通过回波衰减建模装置（465）确定的回波衰减参数（t; G [k，m]; am）; 并根据回波衰减参数（t; am）计算自适应滤波器（210）的滤波器系数（H [k，m]）。

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