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公开(公告)号：US10481859B2
公开(公告)日：2019-11-19
申请号：US15834752
申请日：2017-12-07
发明人： Graham Tull , Troels Bastholm , Mads Berre Eriksen , Kurt Heick Rasmussen , Jens Christian Lindof
摘要： Systems and techniques are provided for audio synchronization and delay estimation. Audio metadata including a first discrete Fourier transform representation may be received. An audio signal may be pre-processed. A second discrete Fourier transform representation may be generated from the pre-processed audio signal. A correlation result in a discrete Fourier transform representation may be generated based on an element-wise multiplication of the first and second discrete Fourier transform representations. An inverse Fourier transform may be performed on the correlation result in a discrete Fourier transform representation to generate a correlated signal including samples that may have a position and a value. A relative delay value may be determined based on the position of a sample having a value with the greatest magnitude. Playback of a second audio signal may be adjusted based on a current delay value adjusted based on the relative delay value.
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公开(公告)号：US20200089468A1
公开(公告)日：2020-03-19
申请号：US16687473
申请日：2019-11-18
发明人： Graham TULL , Troels Bastholm , Mads Berre Eriksen , Kurt Heick Rasmussen , Jens Christian Lindof
摘要： Systems and techniques are provided for audio synchronization and delay estimation. Audio metadata including a first discrete Fourier transform representation may be received. An audio signal may be pre-processed. A second discrete Fourier transform representation may be generated from the pre-processed audio signal. A correlation result in a discrete Fourier transform representation may be generated based on an element-wise multiplication of the first and second discrete Fourier transform representations. An inverse Fourier transform may be performed on the correlation result in a discrete Fourier transform representation to generate a correlated signal including samples that may have a position and a value. A relative delay value may be determined based on the position of a sample having a value with the greatest magnitude. Playback of a second audio signal may be adjusted based on a current delay value adjusted based on the relative delay value.
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公开(公告)号：US20190179597A1
公开(公告)日：2019-06-13
申请号：US15834752
申请日：2017-12-07
发明人： Graham TULL , Troels Bastholm , Mads Berre Eriksen , Kurt Heick Rasmussen , Jens Christian Lindof
CPC分类号： G06F3/165 , H04R3/04 , H04R3/12 , H04R5/02 , H04R27/00 , H04R2227/003 , H04R2420/07 , H04S7/301
摘要： Systems and techniques are provided for audio synchronization and delay estimation. Audio metadata including a first discrete Fourier transform representation may be received. An audio signal may be pre-processed. A second discrete Fourier transform representation may be generated from the pre-processed audio signal. A correlation result in a discrete Fourier transform representation may be generated based on an element-wise multiplication of the first and second discrete Fourier transform representations. An inverse Fourier transform may be performed on the correlation result in a discrete Fourier transform representation to generate a correlated signal including samples that may have a position and a value. A relative delay value may be determined based on the position of a sample having a value with the greatest magnitude. Playback of a second audio signal may be adjusted based on a current delay value adjusted based on the relative delay value.
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