ICASSP '97 Proceedings of the 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '97)-Volume 2 - Volume 2
Unit selection in a concatenative speech synthesis system using a large speech database
ICASSP '96 Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 01
A comparison of grapheme and phoneme-based units for Spanish spoken term detection
Speech Communication
Robust speaker-adaptive HMM-based text-to-speech synthesis
IEEE Transactions on Audio, Speech, and Language Processing
Variable-Length Unit Selection in TTS Using Structural Syntactic Cost
IEEE Transactions on Audio, Speech, and Language Processing
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This paper proposes a method for modeling and generating pitch in hidden Markov model (HMM)-based Mandarin speech synthesis by exploiting prosody hierarchy and dynamic pitch features. The prosodic structure of a sentence is represented by a prosody hierarchy, which is constructed from the predicted prosodic breaks using a supervised classification and regression tree (S-CART). The S-CART is trained by maximizing the proportional reduction of entropy to minimize the errors in the prediction of the prosodic breaks. The pitch contour of a speech sentence is estimated using the STRAIGHT algorithm and decomposed into the prosodic features (static features) at prosodic word, syllable, and frame layers, based on the predicted prosodic structure. Dynamic features at each layer are estimated to preserve the temporal correlation between adjacent units. A hierarchical prosody model is constructed using an unsupervised CART (U-CART) for generating pitch contour. Minimum description length (MDL) is adopted in U-CART training. Objective and subjective evaluations with statistical hypothesis testing were conducted, and the results compared to corresponding results for HMM-based pitch modeling. The comparison confirms the improved performance of the proposed method.