Method for forming the excitation signal for a glottal pulse model based parametric speech synthesis system

A method performed by a processing circuit for identification of sub-band Eigen pulses from a glottal pulse database for training a speech synthesis system, wherein the method comprises:

• a. receiving pulses from the glottal pulse database;
• b. decomposing each pulse into a plurality of sub-band components;
• c. distributing the plurality of sub-band components into a plurality of databases based on a frequency level of sub-band component of the plurality of sub-band components, wherein each database of the plurality of databases corresponds to a frequency level of a sub-band component of the plurality of sub-band components;
• d. determining a vector representation of each database;
• e. determining Eigen pulse values, from the vector representation, for each database;
• f. selecting a best Eigen pulse for each database for use in synthesis;
• and
• g. applying the selected Eigen pulse from the speech signal to form an excitation signal, wherein the excitation signal is applied in the speech synthesis system to synthesize speech.