Filter gain compensation method for specific frequency band using difference between windowed filters
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United States of America Patent
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Mar 20, 2018
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Sep 7, 2017
filing date -
Oct 20, 2016
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Abstract
A filter gain compensation method for a specific frequency band for use in an electronic device is provided. In the method, a windowed filter is applied on each of a plurality of band-pass filters in a multi-segment band-pass filter corresponding to the high-frequency signal and different frequency bands of the low-frequency signal. In addition, a high-frequency cancellation filter corresponding to the high-frequency signal of an input digital signal is calculated. A compensation gain for the high-frequency cancellation filter and each of the band-pass filters is calculated according to fitting frequency gains and a fitting frequency relationship matrix. The output acoustic signal is synthesized using output signals from the windowed band-pass filters and the high-frequency cancellation filter that are obtained according to updated filter features and compensation gain for the windowed band-pass filters and the high-frequency cancellation filter.
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