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Differential coding of speech LSF parameters using hybrid vector quantization and bidirectional prediction

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2 Author(s)
da Silva, L.M. ; Dept. of Electr. Eng., Brasilia Univ., Brazil ; Alcaim, A.

This article presents a new strategy to encode the LP (linear predictive) short-time spectral envelope (STSE) of speech. A better reconstruction of the STSE is achieved by modifying the usual trade-off between the transmission rate of the LP parameters and the performance of the quantization algorithm. A differential coding based on bidirectional prediction and hybrid vector quantization is used to compensate the increase in transmission rate. Simulation results show the effectiveness of this coding strategy

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Speech and Audio Processing, IEEE Transactions on  (Volume:8 ,  Issue: 2 )