Patent · US Expired

Method for recognizing a keyword in speech

US6505156B1 · kind B1 · utility

5Cited by

6References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Jochen Junkawitsch · Hersbruck, DE
Harald Höge · Gauting, DE

Key dates

Filing date	Feb 25, 2000
Grant date	Jan 7, 2003
Priority date	—
Expiry date	Feb 25, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG10L2015/088
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A keyword is recognized in spoken language by assuming a start of this keyword is at every sampling time. An attempt is then made to image this keyword onto a sequence of HMM statusses that represent the keyword. The best path in a presentation space is determined with the Viterbi algorithm; and a local confidence standard is employed instead of the emission probability used in the Viterbi algorithm. When a global confidence standard that is composed of local confidence standards downwardly crosses a lower barrier for the best Viterbi path, then the keyword is recognized; and the sampling time assumed as start of the keyword is confirmed.

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