Patent ID: 8489392

Claim:
A method, comprising: obtaining an estimation of a frequency spectrum for a speech frame; assigning a voicing likelihood value for a plurality of frequencies within the estimated frequency spectrum; identifying at least one voiced band by determining a width within the frequency spectrum comprising a first subset of the plurality of frequencies within the estimated frequency spectrum with voicing likelihood values above a pre-specified threshold; identifying at least one unvoiced band by determining a width within the frequency spectrum comprising a second subset of the plurality of frequencies within the estimated frequency spectrum with voicing likelihood values below a pre-specified threshold; identifying at least one mixed band by determining a width within the frequency spectrum comprising a third subset of the plurality of frequencies between the voiced band and the unvoiced band; creating a voicing shape for the at least one mixed band of frequencies; and at least one of storing or conveying to a remote device parameters of a model associated with the at least one voiced band, the at least one unvoiced band and the at least one mixed band, wherein the parameters of the model include parameters associated with the voicing shape.