Amazon Technologies, Inc.

Gabe Beddingfield

Kurt W Piersol

Michael Alan Pogue

Robert Ayrapetian

Yuwen Su

Preethi Narayanan

Arnaud Jean-Louis Charton

A system may be configured to interact with a user through speech using a first and second audio devices, where the first device produces audio and the second device captures audio. The second device may be configured to perform acoustic echo cancellation with respect to a microphone signal based on a reference signal provided by the first device. The reference and microphone signals may have the same nominal signal rates. However, the signal rates may drift from each other over time. In order to synchronize the rates of the signals, each of the devices maintains a signal index. The second device compares the values of the two signal indexes over time to determine rate differences between the reference and microphone signals and then corrects for the rate differences.

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Fremont, CA, United States of America

Gabe Beddingfield