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

Claim 19:
20. An apparatus for collecting a human voice signal in a far-field pickup device, comprising:
at least one memory configured to store program code; and
at least one processor configured to read the program code and operate as instructed by the program code, the program code comprising:
synchronizing signal generating code configured to cause at least one of the at least one processor to generate 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;

playback code configured to cause at least one of the at least one processor to output the synchronizing signal and the first sound signal;
receiving code configured to cause at least one of the at least one processor to receive an echo of a second sound signal output by a device body of the far-field pickup device and user speech that are collected by a microphone, and a signal based on the collected user speech and the echo;
determining code configured to cause at least one of the at least one processor to determine a time delay between a second frequency band component in the based on the collected user speech and the echo and the synchronizing signal; and
signal obtaining code configured to cause at least one of the at least one processor to perform 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.