Google Inc.

Alexandre Loiko

Alessio Bazzica

Marcus Wirebrand

Samuel Martin Zackrisson

Mans Gustaf Sebastian Ullberg

Daniel Johansson

Ivo Creusen

Iva Creusen

A method includes receiving a microphone audio signal and a playout audio signal, and determining a frequency representation of the microphone audio signal and a frequency representation of the playout audio signal. For each frequency representation, the method also includes determining features based on the frequency representation. Each feature corresponds to a pair of frequencies of the frequency representation and a period of time between the pair of frequencies. The method also includes determining that a match occurs between a first feature based on the frequency representation of the microphone audio signal and a second feature based on the frequency representation of the playout audio signal, and determining that a delay value between the first feature and the second feature corresponds to an echo within the microphone audio signal.

Echo detection

A method () includes receiving a microphone audio signal () and a playout audio signal (), and determining a frequency representation () of the microphone audio signal and a frequency representation of the playout audio signal. For each frequency representation, the method also includes determining features () based on the frequency representation. Each feature corresponds to a pair of frequencies () of the frequency representation and a period of time between the pair of frequencies. The method also includes determining that a match () occurs between a first feature based on the frequency representation of the microphone audio signal and a second feature based on the frequency representation of the playout audio signal, and determining that a delay value () between the first feature and the second feature corresponds to an echo within the microphone audio signal.

Growing community of inventors

Mountain View, CA, United States of America

Alexandre Loiko