Speech Analysis and Synthesis Using a Vocal Tract/Cord Model

Speech Analysis and Synthesis Using a Vocal Tract/Cord Model -- We are considering the use of our vocal cord and tract model [Schroeter and Sondhi, J. Acoust. Soc. Am. Suppl. 1 78, S6 (1985)] for speech coding at bit rates below 4.8 kb/s. Earlier work [Flanagan et al., J Acoust. Soc. Am. 68, 780-791 (1980)] reported on applying an unconstrained optimization method for jointly finding the best vocal tract and glottal parameters directly from the speech signal (one-stage optimization).