Method of and apparatus for determining start-point and end-poin

Details Method of and apparatus for determining start-point and end-poin Method of and apparatus for determining start-point and end-poin

1988-11-18

1990-07-31

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 46, G10L 500

Patent

active

049455664

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.

REFERENCES:
patent: 4688256 (1987-08-01), Yasunaga
patent: 4700394 (1987-10-01), Selbach et al.
patent: 4821325 (1989-04-01), Martin et al.

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