Patent · US Active

System and method for voice activity detection

US11062727B2 · kind B2 · utility

0Cited by

1References

17Claims

0Family size

Assignee

Ceva D.S.P. Ltd. · IL

Inventors

Ofer SHAHEN TOV · Raanana, IL
Ofer Schwartz · Ramat Gan, IL
Aviv DAVID · Hod HaSharon, IL

Key dates

Filing date	Jun 10, 2019
Grant date	Jul 13, 2021
Priority date	—
Expiry date	Aug 24, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG10L2025/786
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a system and method for voice activity detection (VAD) including: obtaining audio frames from a multi-microphone array; calculating steered response power (SRP) values of the audio frames; calculating entropy levels based on the SRP values; detecting a sequence of audio frames in which the entropy levels are substantially constant across the sequence of frames and denoting an entropy level of the sequence as a background entropy; identifying an incoming audio frame as containing voice activity if the difference between a level of entropy of the current audio frame and the background entropy is larger than a first threshold, and as not containing voice activity otherwise.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.