Acoustic Echo Cancellation for Audio System with Bring Your Own Devices (BYOD)

摘要

A controller for the conference session receives at least one audio signal to generate a speaker signal. The controller correlates the speaker signal with network timing information and generates speaker timing information. The controller transmits the correlated speaker signal and timing information to a mobile device participating in the conference session. The mobile device generates an echo cancelled microphone signal from a microphone of the mobile device, and transmits the echo cancelled signal back to the controller. The controller also receives array microphone signals associated with an array of microphones at known positions in the room. The controller removes acoustic echo from the array microphone signals, and estimates a relative location of the mobile device. The controller dynamically selects as audio output corresponding to the mobile device location either (a) the array microphone signal, or (b) the echo cancelled microphone signal from the mobile device.

主权项

1. A method comprising:
receiving at least one audio signal at a controller associated with a conference session; receiving, at the controller, a plurality of array microphone signals associated with an array of microphones at corresponding known positions in a room of the conference session; generating a speaker signal from the at least one audio signal and the plurality of array microphone signals; correlating, at the controller, the speaker signal with network timing information to generate speaker timing information; transmitting the speaker signal with the speaker timing information via a network to a mobile device that is participating in the conference session to enable the mobile device to generate an echo cancelled microphone signal from a microphone of the mobile device; receiving, at the controller, the echo cancelled remote microphone signal; removing an acoustic echo from the plurality of array microphone signals to generate a plurality of echo cancelled array microphone signals; estimating a relative location of the mobile device with respect to one or more of the plurality of array microphones; pairing the mobile device with one or more of the plurality of array microphones based on the relative location of the mobile device; and dynamically selecting as audio output for the mobile device either (a) the echo cancelled array microphone signal associated with the one or more array microphones to which the mobile device is paired or (b) the echo cancelled microphone signal derived from the microphone of the mobile device.