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21.发明公开ENERGY DEPENDENT QUANTIZATION FOR EFFICIENT CODING OF SPATIAL AUDIO PARAMETERS 有权对空间音频参数进行有效编码的能量相关量化
公开(公告)号：EP1754222A1
公开(公告)日：2007-02-21
申请号：EP06724214.9
申请日：2006-04-10
申请人： Coding Technologies AB , Fraunhofer-Gesellschaft Zur Förderung der angewand ten Forschung e.v. , Koninklijke Philips Electronics N.V.
发明人： ROEDEN, Jonas , ENGDEGARD, Jonas , PURNHAGEN, Heiko , BREEBAART,Jeroen , SCHUIJERS, Erik , VAN DE PAR, Steven , HILPERT, Johannes , HERRE, Jürgen
IPC分类号： G10L19/00
CPC分类号： G10L19/03 , G10L19/008
摘要： Parameters being a measure for a characteristic of a channel or of a pair of channels, wherein the parameter is a measure for a characteristic of the channel or of the pair of channels with respect to another channel of a multi-channel signal can be quantized more efficiently using a quantization rule that is generated based on a relation of an energy measure of the channel or the pair of channels and an energy measure of the multi-channel signal. With generation of the quantization rule taking into account a psycho acoustic approach, the size of an encoded representation of the multi-channel signal can be decreased by coarser quantization without significantly disturbing the perceptual quality of the multi-channel signal when reconstructed from the encoded representation.
摘要翻译： 参数是一个信道或一对信道的特性的量度，其中该参数是信道或一对信道相对于多信道信号的另一个信道的特性的量度可以被量化更多 有效地使用基于信道或信道对的能量测量值与多信道信号的能量测量值之间的关系生成的量化规则。 通过考虑心理声学方法产生量化规则，多声道信号的编码表示的大小可以通过较粗量化来减小，而在从编码表示重构时不明显地干扰多声道信号的感知质量 。
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公开(公告)号：EP1808047A1
公开(公告)日：2007-07-18
申请号：EP05807484.0
申请日：2005-10-31
CPC分类号： H04S5/02 , G10L19/008
摘要： A multi-channel audio signal having at least three channels can be reconstructed such, that the reconstructed channels are at least partly de-correlated from each other using a downmixed signal derived from an original multi-channel signal and a set of decorrelated signals provided by a de-correlator (101) that derives the set of de-correlated signals from the downmix signal, wherein the de-correlated signals within the set of de-correlated signals are mutually mostly orthogonal to each other, i.e. an orthogonality relation between channel pairs is satisfied within an orthogonality tolerance range.
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23.发明公开
公开(公告)号：EP1695338A1
公开(公告)日：2006-08-30
申请号：EP05743164.5
申请日：2005-04-12
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 parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel allows a multi-channel reconstruction. An additional level parameter is calculated such that an energy of the at least one downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an up-mixer or within the up-mixing process.
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24.发明授权EFFICIENT AND SCALABLE PARAMETRIC STEREO CODING FOR LOW BITRATE APPLICATIONS 有权高效和可扩展的参数化立体声编码低位速率应用
公开(公告)号：EP1410687B1
公开(公告)日：2005-09-28
申请号：EP02741611.4
申请日：2002-07-10
IPC分类号： H04S5/00
CPC分类号： G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
摘要： The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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25.发明公开ADVANCED PROCESSING BASED ON A COMPLEX-EXPONENTIAL-MODULATED FILTERBANK AND ADAPTIVE TIME SIGNALLING METHODS 有权先进的加工基于带有指数调制滤波器组的自适应时的信令流程关于复
公开(公告)号：EP1616461A2
公开(公告)日：2006-01-18
申请号：EP04730525.5
申请日：2004-04-30
发明人： ENGDEGARD, Jonas , VILLEMOES, Lars
IPC分类号： H04S3/00
CPC分类号： G10L19/008 , G10L19/0204 , H03H17/0266 , H04S5/00 , H04S2420/03
摘要： A synthesizer for generating a decorrelation signal using an input signal is operative on a plurality of subband signals, wherein a subband signal includes a sequence of at least two subband samples, the sequence of the subband samples representing a bandwidth of the subband signal, which is smaller than a bandwidth of the input signal. The synthesizer includes a filter stage (201) for filtering each subband signal using a reverberation filter to obtain a plurality of reverberated subband signals, wherein a plurality of reverberated subband signals together represent the decorrelation signal. This decorrelation signal is used for reconstructing a signal based on a parametrically encoded stereo signal consisting of a mono signal and a coherence measure.
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26.发明公开EFFICIENT AND SCALABLE PARAMETRIC STEREO CODING FOR LOW BITRATE APPLICATIONS 有权高效和可扩展的参数化立体声编码低位速率应用
公开(公告)号：EP1410687A1
公开(公告)日：2004-04-21
申请号：EP02741611.4
申请日：2002-07-10
IPC分类号： H04S5/00
CPC分类号： G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
摘要： The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
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27.发明授权
公开(公告)号：EP1695338B1
公开(公告)日：2007-09-12
申请号：EP05743164.5
申请日：2005-04-12
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 parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel allows a multi-channel reconstruction. An additional level parameter is calculated such that an energy of the at least one downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an up-mixer or within the up-mixing process.
摘要翻译： 具有多个原始声道的多声道信号的参数表示包括参数集，其中，当与至少一种下混合信道一起使用允许多通道重建。 一个额外的等级参数计算搜索那样由电平参数加权的所述至少一个下混声道的能量等于原始通道的能量之和。 附加等级参数为反式mitted到多声道重构器连同参数与缩减混音信道设置或在一起。 用于生成多声道表示的装置使用的电平的参数来校正所述至少一个反式mitted进入缩减混音信号转换成上混频器或上混频过程中之前缩减混音信道的能量。
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28.发明公开INTERPOLATION AND SIGNALLING OF SPACIAL RECONSTRUCTION PARAMETERS FOR MULTICHANNEL CODING AND DECODING OF AUDIO SOURCES 有权插值和信令参数FOR空间重构的多声道编码和解码音频源
公开(公告)号：EP1807824A1
公开(公告)日：2007-07-18
申请号：EP05808103.5
申请日：2005-10-31
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： The present application relates to multichannel source encoding and decoding. On a coder-side, a parameter calculator calculates lower resolution parametric information such as binaural cues, interpolation control information representing the choice of one of a plurality of interpolation characteristics, and generates a downmixed set of channels of the source. On a decoder-side, an upmixer (500) is used for generating the output channels (502) based on a downmixed set of encoded channels. The upmixer (500) uses high resolution parametric information (506) generated by a parameter interpolator (508) based on the low resolution parametric information (510) and decoder-side derived interpolation information (512) or encoder-generated interpolation information (512) for selecting one of a plurality of different interpolation characteristics.
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公开(公告)号：EP1735775B8
公开(公告)日：2008-11-19
申请号：EP05735201.5
申请日：2005-04-12
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 parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel allows a multi-channel reconstruction. An additional level parameter is calculated such that an energy of the at least one downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted down-mix channel before entering the down-mix signal into an up-mixer or within the up-mixing process.
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30.发明授权INTERPOLATION AND SIGNALLING OF SPACIAL RECONSTRUCTION PARAMETERS FOR MULTICHANNEL CODING AND DECODING OF AUDIO SOURCES 有权插值和信令参数FOR空间重构的多声道编码和解码音频源
公开(公告)号：EP1807824B1
公开(公告)日：2008-02-27
申请号：EP05808103.5
申请日：2005-10-31
IPC分类号： G10L19/00
CPC分类号： G10L19/008
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