Patent
1991-11-29
1994-02-15
Fleming, Michael R.
G10L 902
Patent
active
052874290
ABSTRACT:
On carrying out connected word recognition in compliance with a regular grammar and in synchronism with successive specification of input feature vectors of an input pattern, one of an n-th word (n) of first through third occurrence (n(1) to n(3)) is selected as the n-th word of selected occurrence in an i-th period in which an n-th input feature vector is specified. The n-th word appears as the first through the third occurrence in transition rules specified by the grammar. In the i-th period, distances are calculated, only for the n-th word of the selected occurrence, between the input feature vector assigned to the i-th period and reference feature vectors for the n-th word. In the i-th period, a recurrence value g(n, i, j) is calculated only for the n-th word of the selected occurrence under a boundary condition T(p, i-1) iteratively in correspondence to the reference feature vectors by using the distances calculated for the n-th word of the selected occurrence before the i-th period, where j represents each feature vector. The recurrence value for the n-th word of nonselected occurrence is estimated by using the recurrence value for the n-th word of the selected occurrence and the boundary conditions T(p, i-1)'s for the n-th word of the selected and the nonselected occurrence. The above-mentioned one of the n-th word of the first through the third occurrence is selected so as to have a minimum value of the T(p, i-1)'s.
REFERENCES:
patent: 4555796 (1985-11-01), Sakoe
patent: 4624008 (1986-11-01), Vensko et al.
patent: 4882757 (1989-11-01), Fisher et al.
patent: 5073939 (1991-12-01), Vensko et al.
Doerrler Michelle
Fleming Michael R.
NEC Corporation
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