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21.发明授权Generation of spatial downmixes from parametric representations of multi channel signals 有权从多通道信号的参数化表示生成空间缩混公开(公告)号：US08175280B2
公开(公告)日：2012-05-08
申请号：US11469799
申请日：2006-09-01
IPC分类号： H04R5/00
CPC分类号： H04S3/004 , H04S3/002 , H04S3/008 , H04S2400/01 , H04S2420/01
摘要： A headphone down mix signal can be efficiently derived from a parametric down mix of a multi-channel signal, when modified HRTFs (head related transfer functions) are derived from HRTFs of a multi-channel signal using a level parameter having information on a level relation between two channels of the multi-channel signals such that a modified HRTF is stronger influenced by the HRTF of a channel having a higher level than by the HRTF of a channel having a lower level. Modified HRTFs are derived within the decoding process taking into account the relative strength of the channels associated to the HRTFs. The HRTFs are thus modified such that a down mix signal of a parametric representation of a multi-channel signal can directly be used to synthesize the headphone down mix signal without the need of an intermediate full parametric multi-channel reconstruction of the parametric down mix.
摘要翻译： 当使用具有关于电平关系的信息的电平参数从多信道信号的HRTF导出修改的HRTF（头部相关传输函数）时，可以从多信道信号的参数下调混合中有效地导出耳机下混合信号。 在多信道信号的两个信道之间，使得修改的HRTF受到具有比具有较低电平的信道的HRTF高的信道的信道的HRTF更强的影响。 考虑到与HRTF相关联的信道的相对强度，在解码过程中导出修改的HRTF。 因此，HRTF被修改为使得多信道信号的参数表示的下混合信号可以直接用于合成耳机下混合信号，而不需要参数下调混合的中间全参数多通道重建。
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22.发明申请Method for Reduction of Aliasing Introduced by Spectral Envelope Adjustment in Real-Valued Filterbanks 有权减少实数滤波器中频谱信号调整引入的混叠的方法公开(公告)号：US20110054914A1
公开(公告)日：2011-03-03
申请号：US12872482
申请日：2010-08-31
IPC分类号： G10L19/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
摘要翻译： 本发明提出了一种用于提高基于实数滤波器组的频谱包络调节器的性能的新方法。 通过自适应地锁定取决于通道的符号的相邻通道的增益值，如应用中定义的那样，实现了减少的混叠。 此外，增益计算期间信道的分组给出了滤波器组中实值子带信号的改进的能量估计。
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23.发明申请公开(公告)号：US20070223708A1
公开(公告)日：2007-09-27
申请号：US11469799
申请日：2006-09-01
IPC分类号： H04R5/00
CPC分类号： H04S3/004 , H04S3/002 , H04S3/008 , H04S2400/01 , H04S2420/01
摘要： A headphone down mix signal can be efficiently derived from a parametric down mix of a multi-channel signal, when modified HRTFs (head related transfer functions) are derived from HRTFs of a multi-channel signal using a level parameter having information on a level relation between two channels of the multi-channel signals such that a modified HRTF is stronger influenced by the HRTF of a channel having a higher level than by the HRTF of a channel having a lower level. Modified HRTFs are derived within the decoding process taking into account the relative strength of the channels associated to the HRTFs. The HRTFs are thus modified such that a down mix signal of a parametric representation of a multi-channel signal can directly be used to synthesize the headphone down mix signal without the need of an intermediate full parametric multi-channel reconstruction of the parametric down mix.
摘要翻译： 当使用具有关于电平关系的信息的电平参数从多信道信号的HRTF导出修改的HRTF（头部相关传输函数）时，可以从多信道信号的参数下调混合中有效地导出耳机下混合信号。 在多信道信号的两个信道之间，使得修改的HRTF受到具有比具有较低电平的信道的HRTF高的信道的信道的HRTF更强的影响。 考虑到与HRTF相关联的信道的相对强度，在解码过程中导出修改的HRTF。 因此，HRTF被修改为使得多信道信号的参数表示的下混合信号可以直接用于合成耳机下混合信号，而不需要参数下调混合的中间全参数多通道重建。
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24.发明授权公开(公告)号：US08346566B2
公开(公告)日：2013-01-01
申请号：US12872482
申请日：2010-08-31
IPC分类号： G10L19/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
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25.发明授权公开(公告)号：US08145475B2
公开(公告)日：2012-03-27
申请号：US12473075
申请日：2009-05-27
IPC分类号： G10L19/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
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26.发明授权Method for reduction of aliasing introduced by spectral envelope adjustment in real-valued filterbanks 有权减少由实数滤波器组中的频谱包络调整引入的混叠的方法公开(公告)号：US08108209B2
公开(公告)日：2012-01-31
申请号：US12472147
申请日：2009-05-26
IPC分类号： G10L19/00
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
摘要翻译： 本发明提出了一种用于提高基于实数滤波器组的频谱包络调节器的性能的新方法。 通过自适应地锁定取决于通道的符号的相邻通道的增益值，如应用中定义的那样，实现了减少的混叠。 此外，增益计算期间信道的分组给出了滤波器组中实值子带信号的改进的能量估计。
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公开(公告)号：US07965848B2
公开(公告)日：2011-06-21
申请号：US11464149
申请日：2006-08-11
IPC分类号： H04R5/00
CPC分类号： H04S3/00 , H04S2420/03
摘要： An intermediate channel representation of a multi-channel signal can be reconstructed highly efficient and with high fidelity, when upmix parameters for upmixing a transmitted downmix signal to the intermediate channel representation are derived that allow for an upmix using the same upmixing algorithms as within the multi-channel reconstruction. This can be achieved when a parameter re-calculator is used to derive the upmix parameters that takes into account also parameters having information on channels that are not included in the intermediate channel representation.
摘要翻译： 当导出用于将传输的下混合信号上混合到中间信道表示的上混参数被导出时，多通道信号的中间信道表示可以被高效重构并具有高保真度，这允许使用与多重信道内部相同的上混合算法进行上混合 通道重建。 当使用参数重新计算器来导出上混参数时，可以实现这一点，该混合参数也考虑了具有关于不包括在中间信道表示中的信道的信息的参数。
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28.发明授权公开(公告)号：US07577570B2
公开(公告)日：2009-08-18
申请号：US10652397
申请日：2003-08-29
CPC分类号： G10L19/0204 , G10L19/00 , G10L19/025 , G10L19/083 , G10L19/12 , G10L19/26 , G10L25/12 , G10L25/18 , G10L25/21 , G10L25/48 , H03H17/0266
摘要： The present invention proposes a new method for improving the performance of a real-valued filterbank based spectral envelope adjuster. By adaptively locking the gain values for adjacent channels dependent on the sign of the channels, as defined in the application, reduced aliasing is achieved. Furthermore, the grouping of the channels during gain-calculation, gives an improved energy estimate of the real valued subband signals in the filterbank.
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公开(公告)号：US20070233293A1
公开(公告)日：2007-10-04
申请号：US11464149
申请日：2006-08-11
IPC分类号： H04R5/00
CPC分类号： H04S3/00 , H04S2420/03
摘要： An intermediate channel representation of a multi-channel signal can be reconstructed highly efficient and with high fidelity, when upmix parameters for upmixing a transmitted downmix signal to the intermediate channel representation are derived that allow for an upmix using the same upmixing algorithms as within the multi-channel reconstruction. This can be achieved when a parameter re-calculator is used to derive the upmix parameters that takes into account also parameters having information on channels that are not included in the intermediate channel representation.
摘要翻译： 当导出用于将传输的下混合信号上混合到中间信道表示的上混参数被导出时，多通道信号的中间信道表示可以被高效重构并具有高保真度，这允许使用与多重信道内部相同的上混合算法进行上混合 通道重建。 当使用参数重新计算器来导出上混参数时，可以实现这一点，该混合参数也考虑了具有关于不包括在中间信道表示中的信道的信息的参数。
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公开(公告)号：US20120328124A1
公开(公告)日：2012-12-27
申请号：US13582967
申请日：2011-07-14
申请人： Kristofer Kjoerling
发明人： Kristofer Kjoerling
IPC分类号： H03G5/00
CPC分类号： G10L19/0017 , G10L19/0204 , G10L21/038
摘要： The application relates to HFR (High Frequency Reconstruction/Regeneration) of audio signals. In particular, the application relates to a method and system for performing HFR of audio signals having large variations in energy level across the low frequency range which is used to reconstruct the high frequencies of the audio signal. A system configured to generate a plurality of high frequency subband signals covering a high frequency interval from a plurality of low frequency subband signals is described. The system comprises means for receiving the plurality of low frequency subband signals; means for receiving a set of target energies, each target energy covering a different target interval within the high frequency interval and being indicative of the desired energy of one or more high frequency subband signals lying within the target interval; means for generating the plurality of high frequency subband signals from the plurality of low frequency subband signals and from a plurality of spectral gain coefficients associated with the plurality of low frequency subband signals, respectively; and means for adjusting the energy of the plurality of high frequency subband signals using the set of target energies.
摘要翻译： 该应用涉及音频信号的HFR（高频重建/再生）。 特别地，本申请涉及一种用于执行HFR的方法和系统，所述音频信号在用于重构音频信号的高频的低频范围内的能级具有很大变化。 描述了一种被配置为从多个低频子带信号产生覆盖高频间隔的多个高频子带信号的系统。 该系统包括用于接收多个低频子带信号的装置; 用于接收一组目标能量的装置，每个目标能量覆盖高频间隔内的不同目标间隔，并且指示位于目标间隔内的一个或多个高频子带信号的期望能量; 用于分别从多个低频子带信号和与多个低频子带信号相关联的多个频谱增益系数产生多个高频子带信号的装置; 以及用于使用所述目标能量集来调整所述多个高频子带信号的能量的装置。
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