Method and system for coding human speech for subsequent reproduction thereof
First Claim
1. A method for coding human speech for subsequent reproduction thereof, said method comprising the steps of:
- receiving an amount of human-speech-expressive information;
defining a transfer function of said speech and singling out therefrom all poles that are unrelated to any particular resonance of a human vocal tract model, while maintaining all other poles;
defining a glottal pulse related sequence representing said singled out poles through an explicitation of the derivative of the glottal air flow;
outputting speech represented by filter means based on combining said glottal pulse related sequence and a representation of a formant filter with a complex transfer function as expressing said all other poles,wherein said glottal pulse sequence is modelled through further explicitly expressible generation parameters,said method being characterized by supplementing a non-zero decaying return phase to the glottal-pulse response that is explicitized in all its parameters, whilst amending the overall response in accordance with volumetric continuity.
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Abstract
Human speech is coded by singling out from a transfer function of the speech, all poles that are unrelated to any particular resonance of a human vocal tract model. All other poles are maintained. A glottal pulse related sequence is defined representing the singled out poles through an explicitation of the derivative of the glottal air flow. Speech is outputted by a filter based on combining the glottal pulse related sequence and a representation of a formant filter with a complex transfer function expressing all other poles. The glottal pulse sequence is modelled through further explicitly expressible generation parameters. In particular, a non-zero decaying return phase supplemented to the glottal-pulse response that is explicitized in all its parameters, while amending the overall response in accordance with volumetric continuity.
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Citations
4 Claims
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1. A method for coding human speech for subsequent reproduction thereof, said method comprising the steps of:
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receiving an amount of human-speech-expressive information; defining a transfer function of said speech and singling out therefrom all poles that are unrelated to any particular resonance of a human vocal tract model, while maintaining all other poles; defining a glottal pulse related sequence representing said singled out poles through an explicitation of the derivative of the glottal air flow; outputting speech represented by filter means based on combining said glottal pulse related sequence and a representation of a formant filter with a complex transfer function as expressing said all other poles, wherein said glottal pulse sequence is modelled through further explicitly expressible generation parameters, said method being characterized by supplementing a non-zero decaying return phase to the glottal-pulse response that is explicitized in all its parameters, whilst amending the overall response in accordance with volumetric continuity. - View Dependent Claims (2, 3, 4)
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Specification