公开(公告)号：US20230343359A1

公开(公告)日：2023-10-26

申请号：US17729238

申请日：2022-04-26

Applicant: Cirrus Logic International Semiconductor Ltd.

Inventor： William E. SHERWOOD ,  Fred D. GEIGER ,  Narayan KOVVALI ,  Seth SUPPAPPOLA

IPC: G10L21/0388 ,  G10L15/20 ,  G10L21/0364

CPC classification number: G10L21/0388 ,  G10L15/20 ,  G10L21/0364

Abstract: A method of detecting a suitability of a signal for live speech detection, the method comprising: receiving the signal containing speech from a transducer; measuring a signal characteristic of an audible component of the received signal; estimating an expected signal characteristic of an ultrasonic component of the received signal based on the measured signal characteristic of the audible component; determining, based on the estimated expected signal characteristic, whether the ultrasonic component is suitable for detecting whether the speech is live speech.