Speech recognition using the probabilistic neural network
Raymond Low, Roberto B. Togneri · 1998
A novel technique for speaker independent automated speech recognition is proposed. We take a segment model approach to Automated Speech Recognition (ASR), considering the trajectory of an utterance in vector space, then classify using a modified Probabilistic Neural Network (PNN) and maximum likelihood rule. The system performs favourably with established techniques. Our system achieves in excess of 94 % with isolated digit recognition, 88 % with isolated alphabetic letters, and 83% with the confusable /e / set. A favourable compromise between recognition accuracy and computer memory and speech can also be reached by performing clustering on the training data for the PNN. 1.