A simple and efficient algorithm for the compressionof MBROLA segment databases

摘要

Most state-of-the-art TTS synthesizers are based on a technique known as synthesis by concatenation,in which speech is produced by concatenating elementary speech units.the design of a high-qulaity TTS systme implies the storage of a large number of segments.To facilitate the storage of these segments,this paper proposesa very low ocmplexity coder to compress unit databases with a toll quality.A particular interest has been taken in the databases used by the MBROLA synthesizer,composed of fixed-length pitch periods with constrained harmonic phases.The coder developed here uses this special characteristic to reach compression rates from 7 to 9 without degrading the speech quality produced by the synthesizer,and with very limited computational cost.