Patent · US Expired

Method of and apparatus for determining start-point and end-point of isolated utterances in a speech signal

US4945566A · kind A · utility

31Cited by

3References

14Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Dieter Mergel · Hamburg, DE
Hermann Ney · Hamburg, DE
Horst Tomaschewski · Kaltenkirchen, DE

Key dates

Filing date	Nov 18, 1988
Grant date	Jul 31, 1990
Priority date	—
Expiry date	Nov 18, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG10L25/87
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

In a method of and an arrangment for determining the start-point and end-point of a word signal in a speech signal consisting of isolated utterances, three adjacent windows are determined at each new digital value for the last arrived stored digital values, in which the central window contains the actual word signal. The length of this central window is varied for each digital value between a minimum and a maximum value, and a threshold value is determined from the two adjacent windows and is subtracted from the energy contained in the central window. Thus, the method and the apparatus always takes the overall speech signal into account instead of individual isolated portions so that a reliable end-point determination then is possible.

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