Synchronization of inbound and outbound audio in a heterogeneous echo cancellation system
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United States of America Patent
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Nov 7, 2017
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N/A
app pub date -
Feb 16, 2016
filing date -
Feb 16, 2016
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Abstract
An echo cancellation system that synchronizes output audio data with input audio data in a heterogeneous system. The system may increment a counter as outgoing audio frames are sent to a digital-to-analog converter in a speaker. As incoming audio frames are received by an analog-to-digital converter in a microphone, the system may copy contents of the counter into the incoming audio frames. Based on the contents of the counter, the incoming audio frames may be associated with corresponding outgoing audio frames. After synchronizing the incoming audio frames and the outgoing audio frames, the system may perform Acoustic Echo Cancellation by removing the outgoing audio frames from the incoming audio frames.
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