Method and apparatus for word speech recognition by pattern matching
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United States of America Patent
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Mar 24, 1998
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N/A
app pub date -
Apr 10, 1996
filing date -
Jun 19, 1995
priority date (Note) -
Expired
status (Latency Note)
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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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