G - Physics – 10 – L
Patent
G - Physics
10
L
354/47
G10L 15/12 (2006.01) G10L 15/00 (2006.01)
Patent
CA 1218152
ABSTRACT A pattern matching system for speech recognition which is inexpensive while enjoying high speed response and reduced requirement for pattern buffer memory includes: a pattern matching control unit for gathering an L number of time points i of the input pattern into a block; thus changes the block number ii from l to I/L thereby to change signal j indicating the time point of the reference pattern for each block number ii from the lower limit L(ii) to the upper limit U(ii) of a matching region and to change a signal ? indicating the time point in one block of the input pattern from l to L. The system also includes a distance computation unit which has an input pattern buffer having its address specified by the signal of said control unit and a reference pattern buffer for temporarily storing the vector ?? at the j-th frame of the reference pattern so that the input pattern ?i and the reference pattern ?? may be read out from the input pattern buffer and the reference pattern buffer to derive the inter-vector distance Image . An asymptotic equation computa- tion unit is also provided and further includes a difference memory Gn(j), which has its address specified by the signals j and n of the control unit, so that the asymptotic equation of a dynamic programming is computed for the time j of each reference pattern and for each time point ? in one block of the input pattern with reference to the distance Image under the connecting condi- tion of the dissimilarity Gn(j) at the time point (ii-l)?L for the block number ii of the time point of the input pattern, thereby to derive the dis- similarity Gn(j) at the time point ii?L of the input pattern.
466378
Corporation Nec
Smart & Biggar
LandOfFree
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