公开(公告)号：US20220199074A1

公开(公告)日：2022-06-23

申请号：US17604379

申请日：2020-04-13

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Lie LU ,  Xin LIU

IPC: G10L15/197 ,  G10L15/04 ,  G10L15/02 ,  G10L15/22 ,  G10L25/18 ,  H04S1/00 ,  G10L25/81

Abstract: The present application relates to a method of extracting audio features in a dialog detector in response to an input audio signal, the method comprising dividing the input audio signal into a plurality of frames, extracting frame audio features from each frame, determining a set of context windows, each context window including a number of frames surrounding a current frame, deriving, for each context window, a relevant context audio feature for the current frame based on the frame audio features of the frames in each respective context, and concatenating each context audio feature to form a combined feature vector to represent the current frame. The context windows with the different length can improve the response speed and improve robustness.