MBE synthesis of speech coded in LPC format

A method used to produce high quality speech from signals coded in linear predictive coding (LPC) format is proposed. In this method, speech signals coded in the LPC format is synthesized via a multiband excitation (MBE) model. Since the MBE model demands more parameters than the LPC model can provide, techniques had been developed to regenerate the necessarily information for MBE synthesis from LPC coded speech. A V/UV regeneration scheme for MBE synthesis is proposed to extract the V/UV decisions from spectral envelopes by a long term statistical training approach. Informal listening shows that the method provides a significant improvement of speech quality over conventional LPC synthesis. Simulation shows that the synthetic speech produced by the proposed method is comparable to the speech synthesized using MBE.