Connected digit speech recognition by using demi-word pair reference pattern (DWPR)
Hiromi Fujii, Masao Watari, Hiroaki Sakoe, Seibi Chiba · 2005
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%).