A Speech Recognition Back-End Algorithm for Portuguese Language with Unlimited Vocabulary

Francisco J. Fraga

DOI: 10.14209/its.2002.861

Evento: 2002 International Telecommunications Symposium (ITS2002)

Keywords:

Abstract

"It is possible to implement a speech-to\u2014text system with unlimited vocabulary by connecting two subsystems: A phoneme recognizer, which is performed by sub-syllabic segmenting the incoming speech, and a phonologic-graphemic converter. This paper presents an automatic speech recognition system with these features. The segmentation method and the phoneme recognizer are briefly described while the phonologic-graphemic converter is detailed. The algorithm that allows the transition from the phoneme level to the word level is based on rules obtained from the structure of the Portuguese language. This task is achieved without any kind of pronouncing tables, which allows the system to recognize any word that belongs to the Portuguese lexicon, without limitation on the size of the vocabulary"

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