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Sociedade Brasileira de Telecomunicações

Extensão Artificial de Largura de Banda para Sinais de Fala Usando Classificação Fonética

This paper presents a new strategy for implementing artificial band width extension (ABWE) systems of speech signals applied to telephony over packet networks. In the open literature, several approaches are presented for theses systems, however, there is still no procedure that can satisfactorily represent speech segments with concentrated energy at high frequencies. Aiming to improve the performance of these systems, a new strategy based on phonetic classification is discussed here. The obtained results show an enhancement in the quality of reconstructed speech signals, confirming the effectiveness of the proposed strategy.

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