Method and apparatus for word speech recognition by pattern matc

Details Method and apparatus for word speech recognition by pattern matc Method and apparatus for word speech recognition by pattern matc

1996-04-10

1998-03-24

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704252, 704238, 704243, G10L 506, G10L 900

Patent

active

057323941

ABSTRACT:
In a word speech recognition method which performs pattern matching between unknown speech pattern and multiple reference templates and detects that one of the reference templates which provides the smallest one of distance measures detected between the unknown speech pattern and the reference templates, when the difference d between the speech period length of the unknown speech pattern and the speech period length of a selected reference template exceeds a fixed threshold value .epsilon..sub.1, partial patterns are extracted from the unknown speech pattern, each starting at a different position, and the minimum one of the distances obtained by pattern matching between these extracted partial patterns and the selected reference template is determined to be the distance between the selected reference template and the unknown speech pattern. When the difference d is in the range of -.epsilon..sub.2 .ltoreq.d.ltoreq..epsilon..sub.1, pattern matching is performed between speech periods of the unknown speech pattern and the reference templates with their variation periods eliminated therefrom at their both ends.

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