Abstract
This paper describes the improvement of the quality of Tamil text to speech using LPC based diphone database and the modification of syllable pitch through time scale modification. Speech is generated by concatenative speech synthesizer. Syllable units need to be concatenated such that spectral discontinuities are lowered at unit boundaries without degrading their quality. Smoothing is done by inserting suitable diphone at the concatenation boundary and changing the syllable pitch by performing time scale modification. The suitable diphone is chosen based on LPC coefficient files and their corresponding residuals.
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