公开(公告)号：US20210151043A1

公开(公告)日：2021-05-20

申请号：US17025459

申请日：2020-09-18

Applicant: LG ELECTRONICS INC.

Inventor： Inho LEE ,  Junmin LEE ,  Keungsang LEE

IPC: G10L15/20 ,  G10L21/0232 ,  G10L25/84 ,  G10L15/22 ,  G10L15/16 ,  G10L15/02 ,  H04W72/12 ,  H04L5/00 ,  G06N3/04 ,  G06N3/08

Abstract: A voice recognition method of an artificial intelligence robot device is disclosed. The voice recognition method includes collecting a first voice spoken by a user and determining whether a wake-up word of the artificial intelligence robot device is recognized based on the collected first voice; if the wake-up word is not recognized, sensing a location of the user using at least one sensor and determining whether the sensed location of the user is included in a set voice collection range; if the location of the user is included in the voice collection range, learning the first voice and determining a noise state of the first voice based on the learned first voice; collecting a second voice in an opposite direction of the location of the user according to a result of the determined noise state of the first voice; and extracting a feature value of a noise based on the second voice and removing the extracted feature value of the noise from the first voice to obtain the wake-up word. The artificial intelligence robot device may be associated with an artificial intelligence module, an unmanned aerial vehicle (UAV), a robot, an augmented reality (AR) device, a virtual reality (VR) device, devices related to 5G services, and the like.