Correlation-based method for ambience extraction from two-channel audio signals
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United States of America Patent
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Jan 31, 2012
Grant Date -
Apr 9, 2009
app pub date -
Aug 21, 2008
filing date -
Oct 4, 2007
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Abstract
A method of ambience extraction includes analyzing an input signal to determine the time-dependent and frequency-dependent amount of ambience in the input signal, wherein the amount of ambience is determined based on a signal model and correlation quantities computed from the input signals and wherein the ambience is extracted using a multiplicative time-frequency mask. Another method of ambience extraction includes compensating a bias in the estimation of a short-term cross-correlation coefficient. In addition, systems having various modules for implementing the above methods are disclosed.
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