ApplicationNo. 05/476577 filed on 06/05/1974
US Classes:704/265, Interpolation704/269Transformation
ExaminersPrimary: Claffy, Kathleen H.
Assistant: Kemeny, E. S.
Attorney, Agent or Firm
International ClassG10L 11/00 (20060101)
AbstractDisclosed is a system for synthesizing speech from stored signals representative of words precoded in accordance with phase vocoder techniques. The stored signals comprise short-time Fourier transform parameters which describe the magnitude and phase derivative of the short-time signal spectrum. Speech synthesis is achieved by extracting the stored signals of chosen words under control of a duration factor signal, by concatenating the extracted signals, by operating on the phase derivative parameters to effect a desired speech pitch change, by interpolating the magnitude parameters of the short-time Fourier transform in response to the pitch and duration changes, and by decoding the resultant signals in accordance with phase vocoder techniques.