Systems and methods for echo cancellation with arbitrary playback sampling rates
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United States of America Patent
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Jul 31, 2007
Grant Date -
Apr 28, 2005
app pub date -
Feb 24, 2004
filing date -
Oct 24, 2003
priority date (Note) -
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Abstract
The present invention relates to systems and methods that remove echo from a signal via a novel echo cancellation technique that supports arbitrary playback sampling rates. The novel echo cancellation technique transforms a playback signal to a frequency domain representation and converts its sampling rate to a sampling rate of a frequency domain transformed received signal for the appropriate number of frequency bins. This conversion is achieved via an exact or interpolated approached. The re-sampled playback signal transform is then utilized in connection with the received signal transform to remove echo associated with the playback signal from the received signal.
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