System for recognizing speech continuously spoken with number of word or words preselected
AssigneeNippon Electric Co., Ltd.
InventorHiroaki Sakoe
Life of this patent
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Abstract
A continuous speech recognition system comprises a word number specifier for specifying, as the number of continuously spoken word or words, either a single integer or a set of different integers. The single integer may be manually or automatically adjusted. In compliance with the specified word number or numbers, the system carries out pattern matching between an input pattern representative of the spoken word or words and a predetermined number of reference patterns. The matching may be carried into effect by dynamic programming. The input pattern is recognized to be one of the reference patterns or to be a concatenation of some or all of the reference patterns, equal in number either to the single integer or to one of the different integers.
Claims6
In a continuous speech recognition system comprising an input pattern buffer memory for temporarily memorizing an input pattern A represented by a time sequence of input pattern feature vectors a.sub.i, I in number, as:
- A = a.sub.1, a.sub.2, . . . , a.sub.i, . . . , a.sub.I,
- said input pattern being representative of a first predetermined number k of continuously spoken words, said first predetermined number being equal at least to unity;
- a reference pattern memory for memorizing reference patterns B.sup.n representative of a second predetermined number of words n, each reference pattern being represented by a time sequence of referene pattern feature vectors b.sub.j.sup.n, J.sup.n in number, as:
- B.sup.n = b.sub.1.sup.n, b.sub.2.sup.n, . . . , b.sub.j.sup.n, . . . , b.sub.J.spsb.n.sup.n :
- and means responsive to said input and reference pattern feature vectors for recognizing said input pattern to be a concatenation of the reference patterns, k in number;
- the improvment wherein said means comprises a word number specifier for specifying the number K of words of said input pattern, said word number K being preselected for a predetermined duration to be equal at least to unity with reference to said first predetermined number;
- and recognition means responsive to said word number K and said input and reference pattern feature vectors for deciding said concatenation.
Dependencies are inferred from the claim text.