Reconhecimento automatico de palavras isoladas : estudo e aplicação dos metodos deterministico e estocastico

AUTOR(ES)
DATA DE PUBLICAÇÃO

1993

RESUMO

In this work, the most commonly used techniques employed in speech recognition for isolated words were studied and implemented. Initially the parametrization and acoustic pattern recognition methods were discussed. In the discussion, we not only maintained the mathematical formalism as suggested in the literature but also sought the easy way for the practical implementation of these techniques. Three parametrization techniques, namely LPC,LPC-cepstral and Mel cepstral coefficients, were compared with respect to the assimilation capability of speaker-dependent and independent features, and noise robustness. Particularly, the DTW technique (deterministic analysis) was used for these comparative tests, which is capable of eliminating the time difference between two elocutions. A speaker independent digit recognizer was implemented employing the HMM techniques (stochastic analysis) with word modelling and Mel-cepstral coefficients

ASSUNTO(S)

reconhecimento automatico da voz sistemas de reconhecimento de padrões

ACESSO AO ARTIGO

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