Speech recognition method and apparatus
First Claim
1. A speech recognition apparatus comprising:
- feature extracting means for extracting features of an unknown input voice and producing a corresponding unknown voice pattern;
speaker-independent reference pattern storing means for storing speaker-independent reference patterns;
speaker-dependent reference pattern storing means for storing speaker-dependent reference patterns;
speaker-independent recognition means for calculating a degree of similarity between the unknown input pattern and each of the speaker-independent reference patterns and producing at least one candidate for the unknown input pattern;
speaker-dependent recognition means for calculating a degree of similarity between the unknown input pattern and each of the speaker-dependent reference patterns and producing at least one candidate for the unknown input patterns;
coefficient storing means for storing at least one coefficient for correcting the degree of similarity which is obtained by either one of the speaker-independent recognition means and the speaker-dependent recognition means;
correcting means for multiplying said coefficient and the degree of similarity of said candidate supplied from a predetermined one of said speaker-independent recognition means and said speaker-dependent recognition means to generate corrected degrees of similarity of candidate; and
identification means for comparing the degree of similarity of said candidate supplied from the predetermined one of the speaker-independent recognition means and the speaker-dependent recognition means with said corrected degree of similarity of said candidate related to the other recognition means supplied from said correcting means and for selecting one candidate having the highest degree of similarity among said degree of similarity of candidate and said corrected degree of similarity of candidate, said selected one candidate being the recognized result.
0 Assignments
0 Petitions
Accused Products
Abstract
A voice recognition apparatus includes a coefficient memory for storing at least one coefficient for correcting a degree of similarity which is obtained by either one of the speaker-independent recognition and the speaker-dependent recognition. The apparatus also includes a voice identification circuit for comparing the degrees of similarity of the candidates obtained by either one of the speaker-independent recognition and the speaker-dependent recognition with corrected degrees of similarity of the candidates related to the other recognition type which are obtained by performing a predetermined operation to the degree of similarity of each candidate which is supplied from the other recognition type. Then the voice identification decides one candidate having the highest degree of similarity to be an identification result.
65 Citations
10 Claims
-
1. A speech recognition apparatus comprising:
-
feature extracting means for extracting features of an unknown input voice and producing a corresponding unknown voice pattern; speaker-independent reference pattern storing means for storing speaker-independent reference patterns; speaker-dependent reference pattern storing means for storing speaker-dependent reference patterns; speaker-independent recognition means for calculating a degree of similarity between the unknown input pattern and each of the speaker-independent reference patterns and producing at least one candidate for the unknown input pattern; speaker-dependent recognition means for calculating a degree of similarity between the unknown input pattern and each of the speaker-dependent reference patterns and producing at least one candidate for the unknown input patterns; coefficient storing means for storing at least one coefficient for correcting the degree of similarity which is obtained by either one of the speaker-independent recognition means and the speaker-dependent recognition means; correcting means for multiplying said coefficient and the degree of similarity of said candidate supplied from a predetermined one of said speaker-independent recognition means and said speaker-dependent recognition means to generate corrected degrees of similarity of candidate; and identification means for comparing the degree of similarity of said candidate supplied from the predetermined one of the speaker-independent recognition means and the speaker-dependent recognition means with said corrected degree of similarity of said candidate related to the other recognition means supplied from said correcting means and for selecting one candidate having the highest degree of similarity among said degree of similarity of candidate and said corrected degree of similarity of candidate, said selected one candidate being the recognized result. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A speech recognition method comprising the steps of:
-
producing an unknown input voice pattern of an unknown input voice from features extracted from the unknown input voice; calculating a degree of similarity between the produced unknown pattern and reference patterns which are composed of reference patterns used exclusively for speaker-independent recognition and reference patterns used exclusively for speaker-dependent recognition to thereby generate at least one candidate related to said speaker-independent recognition and at least one candidate related to said speaker-independent recognition; correcting the degree of similarity of said candidate a predetermined one of the speaker-independent recognition and the speaker-dependent recognition by multiplying said degree of similarity and a coefficient to thereby generate corrected degree of similarity of candidate; comparing said degree of similarity of said candidate related to the predetermined one of said speaker-dependent recognition and said speaker-dependent recognition with said corrected degree of similarity of said candidate related to the other recognition; and selecting one candidate having the highest degree of similarity among said degree of similarity of candidate and said corrected degree of similarity of candidate, said selected one candidate being the recognized result. - View Dependent Claims (9, 10)
-
Specification