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公开(公告)号：EP1905006A1
公开(公告)日：2008-04-02
申请号：EP06780055.7
申请日：2006-07-12
CPC分类号： H04S3/008 , G10L19/008
摘要： A decoder (115) generates a multi channel audio signal, such as a surround sound signal, from a received first signal. The multi-channel signal comprises a second set of audio channels and the first signal comprises a first set of audio channels. The decoder (115) comprises a receiver (401) which receives the first signal. The receiver (401) is coupled to an estimate processor (405) which generates estimated parametric data for the second set of audio channels in response to characteristics of the first set of audio channels. The estimated parametric data relates characteristics of the second set of audio channels to characteristics of the first set of audio channels. The decoder (115) furthermore comprises a spatial audio decoder (403) which decodes the first signal in response to the estimated parametric data to generate the multi-channel signal comprising the second set of channels. The invention allows use of spatial audio decoding with signals that are not encoded by a spatial audio encoder.
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公开(公告)号：EP1730726B1
公开(公告)日：2007-10-10
申请号：EP05811028.9
申请日：2005-10-28
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： For a multi-channel reconstruction of audio signals based on at least one base channel, an energy measure is used for compensating energy losses due to an predictive upmix. The energy measure can be applied in the encoder or the decoder. Furthermore, a decorrelated signal is added to output channels generated by an energy-loss introducing upmix procedure. The energy of the decorrelated signal is smaller than or equal to an energy error introduced by the predictive upmix. Thus, problems occurring for prediction based up-mix methods such as up-mixing signals that are coded with High Frequency Reconstruction techniques are solved, so that the correct correlation between the up-mixed channels is obtained or the up-mix is adapted to arbitrary down-mixes.
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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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公开(公告)号：EP1683133B1
公开(公告)日：2007-02-14
申请号：EP04770333.5
申请日：2004-10-28
发明人： VILLEMOES, Lars, F. , EKSTRAND, Per , PURNHAGEN, Heiko , SCHUIJERS, Erik, G., P. , DE BONT, Fransiscus M., J.
CPC分类号： G10L19/008 , G10L21/038
摘要： Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel and the second audio channel in a complex modulated filterbank to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downsampling each of the subband signals to provide a first plurality of downsampled subband signals and a second plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, deriving spatial parameters from the sub-subband signals and from those downsampled subband signals that are not further subband filtered, and deriving a single channel audio signal comprising derived subband signals derived from the first plurality of downsampled subband signals and the second plurality of downsampled subband signals. Further, decoding is provided wherein an encoded audio signal comprising an encoded single channel audio signal and a set of spatial parameters is decoded by decoding the encoded single channel audio channel to obtain a plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, and deriving two audio channels from the spatial parameters, the sub-subband signals and those downsampled subband signals that are not further subband filtered.
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5.发明公开APPARATUS AND METHOD FOR GENERATING MULTI-CHANNEL SYNTHESIZER CONTROL SIGNAL AND APPARATUS AND METHOD FOR MULTI-CHANNEL SYNTHESIZING 有权装置和方法，用于生成多声道合成器控制信号的装置和方法的多声道SYNTHESIZEN
公开(公告)号：EP1738356A1
公开(公告)日：2007-01-03
申请号：EP06706309.9
申请日：2006-01-19
申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. , Coding Technologies AB , Koninklijke Philips Electronics N.V.
发明人： NEUSINGER, Matthias , HERRE, Juergen , DISCH, Sascha , PURNHAGEN, Heiko , KJOERLING, Kristofer , ENGDEGARD, Jonas , BREEBAART, J., Koninklijke Philips Electronic N.V. , SCHUIJERS, E., Koninklijke Philips Electronic N.V. , OOMEN, W., Koninklijke Philips Electronic N.V.
CPC分类号： G10L19/26 , G10L19/008 , G10L2019/0012 , H04S3/008
摘要： On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel 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.
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公开(公告)号：EP1784819B1
公开(公告)日：2008-04-30
申请号：EP05798859.4
申请日：2005-10-31
发明人： PURNHAGEN, Heiko , BREEBAART, Jeroen , SCHUIJERS, Erik , VILLEMOES, Lars , RÖDEN, Jonas , ENGDEGARD, Jonas
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： A parametric representation (12) of a multi-channel audio signal having parameters suited to be used together with a monophonic downmix signal to calculate a reconstruction of the multi-channel audio signal can efficiently be derived in a stereo-backwards compatible way when a parameter combiner (18) is used to generate the parametric representation (12) by combining one or more spatial parameters (20) and a stereo parameter (22) resulting in a parametric representation (12) having a decoder usable stereo parameter (24) and an information on the one or more spatial parameters (26) that represents, together with the decoder usable stereo parameter (24) , the one or more spatial parameters (20).
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7.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：EP1738353A1
公开(公告)日：2007-01-03
申请号：EP05797620.1
申请日：2005-10-28
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： 一种多声道合成器，用于使用具有至少一个基本声道的输入信号来产生至少三个输出声道（110,111,112），所述基本声道是从原始多声道信号（101,102,103）导出的， 所述输入信号还包括至少两个不同的上混频参数，以及上混频器模式指示（1005），其在第一状态下指示要执行第一上混频规则，并且在第二状态中指示 ，要执行不同的第二上混合规则，基于第一或第二上混合规则，使用上混合器使用至少两个不同的上混合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），从而获得至少三个输出通道（110,111,112）。
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公开(公告)号：EP1683133A1
公开(公告)日：2006-07-26
申请号：EP04770333.5
申请日：2004-10-28
发明人： VILLEMOES, Lars, F. , EKSTRAND, Per , PURNHAGEN, Heiko , SCHUIJERS, Erik, G., P. , DE BONT, Fransiscus M., J.
CPC分类号： G10L19/008 , G10L21/038
摘要： Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel and the second audio channel in a complex modulated filterbank to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downsampling each of the subband signals to provide a first plurality of downsampled subband signals and a second plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, deriving spatial parameters from the sub-subband signals and from those downsampled subband signals that are not further subband filtered, and deriving a single channel audio signal comprising derived subband signals derived from the first plurality of downsampled subband signals and the second plurality of downsampled subband signals. Further, decoding is provided wherein an encoded audio signal comprising an encoded single channel audio signal and a set of spatial parameters is decoded by decoding the encoded single channel audio channel to obtain a plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, and deriving two audio channels from the spatial parameters, the sub-subband signals and those downsampled subband signals that are not further subband filtered.
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10.发明授权ENERGY DEPENDENT QUANTIZATION FOR EFFICIENT CODING OF SPATIAL AUDIO PARAMETERS 有权依赖能源的QUANTIZE FOR有效编码空间音频参数
公开(公告)号：EP1754222B1
公开(公告)日：2007-11-14
申请号：EP06724214.9
申请日：2006-04-10
申请人： Coding Technologies AB , Fraunhofer-Gesellschaft zur Förderung der angewandten 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.
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