High end speech synthesis

A guide track based speech synthesis system for a guide track based speech imitation method for enhancing expressiveness of the speech synthesized from texts with context features and a acoustic feature extracted from an imitator voice, the system comprising:

• a context feature extraction module, the context feature extraction module configured to extract at least one context feature from an imitator voice;
• a context feature correction module, the context feature correction module configured to provide an interface for manually correcting the at least one context feature according to an authentic and accurate pronunciation of the imitator voice;
• an acoustic feature extraction module, the acoustic feature extraction module configured to extract prosodic and spectral features from the imitator voice;
• an acoustic feature correction module, the acoustic feature correction module configured to provide an interface for manually correcting the extracted prosodic features;
• a guide track segmentation and correction module, the guide track segmentation and correction module configured to automatically align a sequence of extracted and corrected acoustic features towards a phone sequence with manual corrections;
• an acoustic generation module, the acoustic generation module configured to predict spectral features from the voice library using the context features and the alignment results;
• and
• a speech reconstruction module, the speech reconstruction module configured to reconstruct a speech waveform from the spectral features generated by the acoustic generation module, and the prosodic features given by the an acoustic feature extraction/correction module.