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1. 发明申请

WO2005043511A1 AUDIO SIGNAL ENCODING OR DECODING 审中-公开
标题翻译：音频信号编码或解码
公开(公告)号：WO2005043511A1
公开(公告)日：2005-05-12
申请号：PCT/IB2004/052226
申请日：2004-10-28
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , CODING TECHNOLOGIES GMBH , VILLEMOES, Lars, F. , EKSTRAND, Per , PURNHAGEN, Heiko , SCHUIJERS, Erik, G., P. , DE BONT, Fransiscus M., J.
发明人： VILLEMOES, Lars, F. , EKSTRAND, Per , PURNHAGEN, Heiko , SCHUIJERS, Erik, G., P. , DE BONT, Fransiscus M., J.
IPC分类号： G10L19/00
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.
摘要翻译：提供对音频信号的编码，其中音频信号包括第一音频通道和第二音频通道，该编码包括在复调制滤波器组中对第一音频通道和第二音频通道中的每一个进行子带滤波，以提供第一多个子带信号对于第一音频通道和用于第二音频通道的第二多个子带信号，对每个子带信号进行下采样以提供第一多个下采样子带信号和第二多个下采样子带信号，进一步子带滤波至少一个在另一个滤波器组中进行下采样的子带信号，以便提供多个子子带信号，从子子带信号和未进一步子带滤波的那些下采样子带信号导出空间参数，以及导出包括导出的从第一多个下采样子带信号导出的子带信号和第二多个下采样子带信号。此外，提供了解码，其中包括编码的单声道音频信号和一组空间参数的编码音频信号通过对编码的单声道音频声道进行解码以获得多个下采样的子带信号而被解码，进一步的子带滤波至少一个在另一滤波器组中进行下采样的子带信号，以便提供多个子子带信号，以及从空间参数，子子带信号和未进一步子带滤波的那些下采样子带信号导出两个音频信道。

2. 发明申请

WO2006103584A1 MULTI-CHANNEL AUDIO CODING 审中-公开
标题翻译：多声道音频编码
公开(公告)号：WO2006103584A1
公开(公告)日：2006-10-05
申请号：PCT/IB2006/050822
申请日：2006-03-16
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , CODING TECHNOLOGIES AB , HOTHO, Gerard, H. , BREEBAART, Dirk, J. , SCHUIJERS, Erik, G., P. , DEN BRINKER, Albertus, C. , VILLEMOES, Lars, F. , PURNHAGEN, Heiko , RÖDÉN, Karl, J.
发明人： HOTHO, Gerard, H. , BREEBAART, Dirk, J. , SCHUIJERS, Erik, G., P. , DEN BRINKER, Albertus, C. , VILLEMOES, Lars, F. , PURNHAGEN, Heiko , RÖDÉN, Karl, J.
IPC分类号： G10L19/00 , H04S3/00
CPC分类号： G10L19/008 , H04R2420/07 , H04S3/008
摘要： A multi-channel audio encoder (10) for encoding a multi-channel audio signal (101), e.g. a 5.1 channel audio signal, into a spatial down-mix (102), e.g. a stereo signal, and associated parameters (104, 105). The encoder (10) comprises first and second units (110, 120). The first unit (110) encodes the multi-channel audio signal (101) into the spatial down-mix (102) and parameters (104). These parameters (104) enable a multi-channel decoder (20) to reconstruct the multi¬ channel audio signal (203) from the spatial down-mix (102). The second unit (120) generates, from the spatial down-mix (102), parameters (105) that enable the decoder to reconstruct the spatial down-mix (202) from an alternative down- mix (103), e.g. a so-called artistic down-mix that has been manually mixed in a sound studio. In this way, the decoder (20) can efficiently deal with a situation in which an alternative down-mix (103) is received instead of the regular spatial, down-mix (102). In the decoder (20), first the spatial down-mix (202) is reconstructed from the alternative down-mix (103) and the parameters (105). Next, the spatial down-mix (202) is decoded into the multi-channel audio signal (203).
摘要翻译：一种用于对多声道音频信号（101）进行编码的多声道音频编码器（10）。 5.1声道音频信号转换成空间缩混（102）。立体声信号和相关参数（104,105）。编码器（10）包括第一和第二单元（110,120）。第一单元（110）将多声道音频信号（101）编码成空间缩混（102）和参数（104）。这些参数（104）使得多声道解码器（20）能够从空间缩混（102）重建多声道音频信号（203）。第二单元（120）从空间向下混合（102）产生能够使解码器从替代的下混合（103）重构空间缩混（202）的参数（105）。所谓的艺术混合，已经在一个健全的工作室手工混合。以这种方式，解码器（20）可以有效地处理其中接收替代的下混合（103）而不是常规的空间，下混合（102）的情况。在解码器（20）中，首先，从替代的下混合（103）和参数（105）重构空间缩混（202）。接下来，空间缩混（202）被解码为多声道音频信号（203）。

3. 发明申请

WO2006048814A1 ENCODING AND DECODING OF AUDIO SIGNALS USING COMPLEX-VALUED FILTER BANKS 审中-公开
标题翻译：使用复合过滤器银行编码和解码音频信号
公开(公告)号：WO2006048814A1
公开(公告)日：2006-05-11
申请号：PCT/IB2005/053545
申请日：2005-10-31
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , CODING TECHNOLOGIES AB , VILLEMOES, Lars, F. , SCHUIJERS, Erik, G., P.
发明人： VILLEMOES, Lars, F. , SCHUIJERS, Erik, G., P.
IPC分类号： G10L19/02
CPC分类号： G10L19/0204
摘要： An encoder (109) comprises a receiver (201) which receives a time domain audio signal. A filter bank (203) generates a first subband signal from the time domain audio signal where the first subband signal corresponds to a non-critically sampled complex subband domain representation of the time domain signal. A conversion processor (205) generates a second subband signal from the first subband signal by subband processing. The second subband signal corresponds to a critically sampled complex subband domain representation of the time domain audio signals. An encode processor (207) then generates a waveform encoded data stream by encoding data values of the second subband signal. The conversion processor (205) generates the second subband signal by direct subband conversion without converting back to the time domain. The invention allows an oversampled subband signal typically generated in parametric encoding to be waveform encoded with reduced complexity. A decoder performs the inverse operation.
摘要翻译：编码器（109）包括接收时域音频信号的接收机（201）。滤波器组（203）从时域音频信号产生第一子带信号，其中第一子带信号对应于时域信号的非临时采样的复子带域表示。转换处理器（205）通过子带处理从第一子带信号产生第二子带信号。第二子带信号对应于时域音频信号的批次采样的复数子带域表示。然后，编码处理器（207）通过对第二子带信号的数据值进行编码来生成波形编码数据流。转换处理器（205）通过直接子带转换产生第二子带信号而不转换回时域。本发明允许通常在参数编码中产生的过采样子带信号以降低的复杂度进行波形编码。解码器执行逆运算。

4. 发明申请

WO2007110823A1 AUDIO DECODING 审中-公开
标题翻译：音频解码
公开(公告)号：WO2007110823A1
公开(公告)日：2007-10-04
申请号：PCT/IB2007/051024
申请日：2007-03-23
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , CODING TECHNOLOGIES AB , VILLEMOES, Lars, F. , SCHUIJERS, Erik, G., P.
发明人： VILLEMOES, Lars, F. , SCHUIJERS, Erik, G., P.
IPC分类号： G10L19/02 , G10L19/14 , H04S3/02 , H04S5/00
CPC分类号： H04S3/008 , G10L19/008 , G10L19/0208 , G10L25/18
摘要： An audio decoder comprises a receiver (801) for receiving input data comprising an N-channel signal corresponding to a down-mixed signal of an M-channel audio signal, M>N, having complex valued subband encoding matrices applied in frequency subbands and parametric multi-channel data. A subband filter bank (805) generates real- valued frequency subbands for the N-channel signal. A matrix processor (809) determines real- valued subband decoding matrices for compensating the application of the encoding matrices in response to the parametric multi-channel data. A compensation processor (807) generates down-mix data corresponding to the down-mixed signal by a matrix multiplication of the real-valued subband decoding matrices and data of the N-channel signal in the at least some real- valued frequency subbands. The down-mix data can be used to regenerate the down-mixed signal and the M-channel audio signal. The decoder may compensate for MPEG Matrix Surround Compatibility operations performed at the encoder using real- valued frequency subbands.
摘要翻译：音频解码器包括接收器（801），用于接收输入数据，该输入数据包括对应于M频道音频信号M> N的下混合信号的N信道信号，M信道具有在频率子带中应用的复值子带编码矩阵，并且参数多通道数据。子带滤波器组（805）产生用于N沟道信号的实际频率子带。矩阵处理器（809）响应于参数多通道数据确定用于补偿编码矩阵的应用的实数子带解码矩阵。补偿处理器（807）通过实数子带解码矩阵的矩阵乘法和至少一些实际频率子带中的N信道信号的数据来生成与下混合信号相对应的下混数据。下混合数据可用于重新生成下混合信号和M声道音频信号。解码器可以补偿使用实数频率子带在编码器处执行的MPEG矩阵环绕兼容性操作。

5. 发明申请

WO2007010451A1 GENERATION OF MULTI-CHANNEL AUDIO SIGNALS 审中-公开
标题翻译：多通道音频信号的产生
公开(公告)号：WO2007010451A1
公开(公告)日：2007-01-25
申请号：PCT/IB2006/052368
申请日：2006-07-12
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , CODING TECHNOLOGIES AB , AGERE SYSTEMS , BREEBAART, Dirk, J. , VILLEMOES, Lars, F. , PURNHAGEN, Heiko , FALLER, Christof
发明人： BREEBAART, Dirk, J. , VILLEMOES, Lars, F. , PURNHAGEN, Heiko , FALLER, Christof
IPC分类号： G10L19/00 , H04S3/00
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.
摘要翻译：解码器（115）从接收的第一信号生成诸如环绕声信号的多声道音频信号。多声道信号包括第二组音频通道，第一信号包括第一组音频通道。解码器（115）包括接收第一信号的接收机（401）。接收器（401）耦合到估计处理器（405），该估计处理器响应于第一组音频通道的特性而产生第二组音频通道的估计参数数据。估计的参数数据将第二组音频通道的特性与第一组音频通道的特性相关联。解码器（115）还包括空间音频解码器（403），其响应于所估计的参数数据对第一信号进行解码，以产生包括第二组信道的多信道信号。本发明允许对空间音频编码器未编码的信号使用空间音频解码。

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