Sixth European Conference on Speech Communication and Technology

Budapest, Hungary
September 5-9, 1999

Exploiting Improved Parameter Smoothing Within a Hybrid Concatenative/LPC Speech Synthesizer

Erhard Rank

Institute of Communications and Radio-Frequency Engineering, Vienna University of Technology, Wien, Austria

We depict the interpolation strategies for the concatenation of inventory demisyllables in our hybrid concatena-tive/ LPC speech synthesizer. Inventory elements for vowels and nasals are cut in the steady state of the phoneme. Concatenating elements in the synthesis stage requires smoothing of spectral content and energy to avoid annoying discontinuities in these parameters, which is of vital importance for the quality of synthesized speech. The hy-brid synthesizer concept allows the application of smoothing algorithms uncommon to pure time domain synthesis. Using the smoothing algorithmalso the occurrence of musical tones due to the LPC filter resonances at the begin of pauses can be suppressed.

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Bibliographic reference.  Rank, Erhard (1999): "Exploiting improved parameter smoothing within a hybrid concatenative/LPC speech synthesizer", In EUROSPEECH'99, 2339-2342.