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An Unsupervised Adaptive Filtering Approach of 2-to-5 Channel Upmix

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A new algorithm of converting two-channel audio materials to five-channel based on subband unsupervised adaptive filtering is proposed in this paper. This algorithm uses a subband analysis-processing-synthesis framework. In each subband, a robust stereo image is obtained using principle component analysis, and an effective energy re-distribution among surround channels is achieved by mapping cross-correlation between two input channels to a weighted panning matrix.

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Permalink: http://www.aes.org/e-lib/browse.cfm?elib=13284

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