Patent ID: 8200497

Claim:
A method of synthesizing a set of digital speech samples corresponding to a selected voicing state from speech model parameters, the method comprising the steps of: dividing the speech model parameters into frames, wherein a frame of speech model parameters includes pitch information, voicing information determining the voicing state in one or more frequency regions, and spectral information; computing a first digital filter using a first frame of speech model parameters, wherein the frequency response of the first digital filter corresponds to the spectral information in frequency regions where the voicing state equals the selected voicing state; computing a second digital filter using a second frame of speech model parameters, wherein the frequency response of the second digital filter corresponds to the spectral information in frequency regions where the voicing state equals the selected voicing state; determining a set of pulse locations; producing a set of first signal samples from the first digital filter and the pulse locations; producing a set of second signal samples from the second digital filter and the pulse locations; combining the first signal samples with the second signal samples to produce a set of digital speech samples corresponding to the selected voicing state; using the set of digital speech samples corresponding to the selected voicing state to produce speech samples of a digital speech signal; providing the speech samples of the digital speech signal to a digital-to-analog converter that converts the speech samples of the digital speech signal to an analog signal; and providing the analog signal to a speaker that converts the analog signal into an acoustic signal suitable for human listening.