Elimination of cross-channel interference and multi-channel source separation by using an interference elimination coefficient based on a source signal absence probability
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United States of America Patent
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Jun 12, 2012
Grant Date -
Feb 16, 2006
app pub date -
Aug 12, 2005
filing date -
Aug 14, 2004
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Abstract
Cross-channel interference is eliminated and multi-channel sources are separated by estimating a source absence probability for a current frame of a first channel output, and determining an interference elimination coefficient for matching a secondary signal of the first channel output with a primary signal of a second channel output by using the source absence probability, generating an interference signal by multiplying the second channel output by an over-subtraction factor and the interference elimination coefficient, wherein a partial differentiation is performed for a v-norm value of a spectral amplitude difference, between the first channel output and the second channel output multiplied by the interference elimination coefficient and a result of multiplication of the source absence probability, by using the interference elimination coefficient to determine an update amount of the interference elimination coefficient for a next frame.
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