Patent ID: 11871176
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 14:
15. A method for collecting a human voice signal in a far-field pickup device, the far-field pickup device comprising a device body and a microphone, the method comprising:
generating, by the device body, a synchronizing signal that is synchronized with a first sound signal, the first sound signal having a frequency in a first frequency band, the synchronizing signal having a frequency in a second frequency band, wherein the second frequency band is different from the first frequency band;
outputting, by the device body, a second sound signal based on the synchronizing signal and the first sound signal;
receiving, by the device body, an echo of the second sound signal output by the device body and user speech that are collected by the microphone, and a signal based on the collected user speech and the echo;
determining, by the device body, a time delay between a second frequency band component in the signal based on the collected user speech and the echo and the synchronizing signal; and
performing, by the device body, echo cancellation on the signal based on the collected user speech and the echo to obtain a collected human voice signal, by using the first sound signal delayed according to the time delay.