| 摘要 |
PROBLEM TO BE SOLVED: To prevent waveform data base from becoming huge because in a case of wave superimposing, when a synthesis unit is made large, for example, from CV to VCV, synthetic speech is improved in the quality but increases in the number of speech pieces being the synthesis unit. SOLUTION: Concerning synthesis units 102, 105, 106 of VCV, vocal section of all speech pieces is decomposed into pitch waveforms like 110-119, 120-129. Here, resembled pitch waveforms are grouped respectively, and only one pitch waveform, which becomes a representative in each group, is stored in a data base, and a capacity for the waveform data base is reduced by sharing the pitch waveform between the speech pieces. Moreover, a capacity for the waveform data base is reduced by grouping voiceless sound waveforms for each phoneme and sharing the resembled waveforms between the speech pieces. |
