Method for determining the variation with time of a speech param

Details Method for determining the variation with time of a speech param Method for determining the variation with time of a speech param

1987-11-24

1989-03-14

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

364402, 381 47, G10L 500

Patent

active

048130753

ABSTRACT:
In a speech or speaker recognition system, a segment or sequence of speech parameter values are smoothed to a most probable sequency by Dynamic Programming. The method for determining the variation with time of a speech parameter is based on a speech signal which is subdivided into successive segments and an individual value exists in each segment and for each value of the parameter within a limited range of values. For the example of the fundamental voice frequency, a value has been generated in each speech segment with the aid of the AMDF (Average Magnitude Difference Function). The required variation now links a sequency of horizontally, vertically or diagonally directly adjacent speech parameter values to one another in such a manner that the sum of the associated individual values represents a minimum. In this arrangement, this sum is slightly magnified in diagonal or vertical sections since a horizontal variation is most probable. This magnification is controlled by certain fixed values which influence the smoothness of the variation.

REFERENCES:
patent: 4555796 (1985-11-01), Sakoe
patent: 4751737 (1988-06-01), Gerson

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