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- W1569121103 abstract "It is known that voice quality plays an important role in expres- sive speech. In this paper, we present a methodology for modi- fying vocal effort level, which can be applied by text-to-speech (TTS) systems to provide the flexibility needed to improve the naturalness of synthesized speech. This extends previous work using low order Linear Prediction Coefficients (LPC) where the flexibility was constrained by the amount of vocal effort levels available in the corpora. The proposed methodology overcomes these limitations by replacing the low order LPC by ninth or- der polynomials to allow not only vocal effort to be modified towards the available templates, but also to allow the generation of intermediate vocal effort levels between levels available in training data. This flexibility comes from the combination of Harmonics plus Noise Models and using a parametric model to represent the spectral envelope. The conducted perceptual tests demonstrate the effectiveness of the proposed technique in per- forming vocal effort interpolations while maintaining the signal quality in the final synthesis. The proposed technique can be used in unit-selection TTS systems to reduce corpus size while increasing its flexibility, and the techniques could potentially be employed by HMM based speech synthesis systems if appropri- ate acoustic features are being used. Index Terms: vocal effort interpolation, harmonics plus noise model, expressive speech synthesis" @default.
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- W1569121103 date "2013-01-01" @default.
- W1569121103 modified "2023-09-27" @default.
- W1569121103 title "Parametric model for vocal effort interpolation with Harmonics Plus Noise Models" @default.
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