Patent · US Active

Apparatus and method to classify sound to detect speech

US9076459B2 · kind B2 · utility

140Cited by
30References
45Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 12, 2013
Grant dateJul 7, 2015
Priority date—
Expiry dateDec 27, 2033

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG10L25/78
  • WIPO fieldComputer technology
  • WIPO sectorElectrical engineering

Abstract

Audio frames are classified as either speech, non-transient background noise, or transient noise events. Probabilities of speech or transient noise event, or other metrics may be calculated to indicate confidence in classification. Frames classified as speech or noise events are not used in updating models (e.g., spectral subtraction noise estimates, silence model, background energy estimates, signal-to-noise ratio) of non-transient background noise. Frame classification affects acceptance/rejection of recognition hypothesis. Classifications and other audio related information may be determined by circuitry in a headset, and sent (e.g., wirelessly) to a separate processor-based recognition device.

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