Apparatuses and systems for acoustic channel auto-balancing during multi-channel signal extraction
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United States of America Patent
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Jul 2, 2019
Grant Date -
Feb 8, 2018
app pub date -
Oct 14, 2017
filing date -
Mar 13, 2013
priority date (Note) -
In Force
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Abstract
Systems and apparatuses are described to automatically balance acoustic channel sensitivity. A computer readable medium containing executable computer program instructions, which when executed by an acoustic signal processing system, cause the acoustic signal processing system to perform a process that includes calculating a long-term power level of a main acoustic signal to obtain an averaged main acoustic signal. Segments of the main acoustic signal are excluded from the averaged main acoustic signal using a desired voice activity detection signal. A long-term power level of a reference acoustic signal is calculated to obtain an averaged reference acoustic signal. Segments of the reference acoustic signal are excluded from the averaged reference acoustic signal using the desired voice activity detection signal. An amplitude correction signal is created using the averaged main acoustic signal and the averaged reference acoustic signal. The amplitude correction signal is used to adjust either the main acoustic signal or the reference acoustic signal to automatically balance acoustic channel sensitivity.
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