Connected digit speech recognition by using demi-word pair reference pattern (DWPR)

This paper proposes two methods that cope with difficulties in connected digit recognition. One is the ´Demi-Word Pair Reference Pattern(DWPR) Method´, which is useful for dealing with the coarticulation effect appearing at the word boundaries. The other is the ´Typically Distorted Pattern (TDP) Method´. This helps prepare robust reference templates including several types of distortion which often occur in natural speech. An experiment has been performed for 20 untrained speakers in speaker-dependent mode. The TDP was gathered from multiple speakers´ pattern. The results showed that the TDP+DWPR integrated method achieved considerably higher recognition accuracy (99.0%) than a conventional word-based DP-matching method (97.5%).