Synthesis of artificial speech

Claim 1

APPARATUS FOR RECONSTRUCTING ARTIFICIAL SPEECH WHICH COMPRISES A SOURCE OF A FIRST CONTROL SIGNAL REPRESENTATIVE OF THE PERIODICITY OF VOICED PORTIONS OF A SPEECH WAVE, A SOURCE OF A SECOND CONTROL SIGNAL REPRESENTATIVE OF THE GLOTTAL DUTY CYCLE OF SAID SPEECH WAVE, MEANS SUPPLIED WITH SAID FIRST CONTROL SIGNAL AND SAID SECOND CONTROL SIGNAL FOR GENERATING A GLOTTAL AREA WAVE CLOSELY REPRESENTATIVE OF THE TIME-VARYING AREA OF THE GLOTTIS DURING EACH OF PERIOD OF SAID SPEECH WAVE A PLURILITY OF FREQUENCY CONTROL SIGNALS REPRESENTATIVE OF THE FREQUENCIES OF SELECTED RESONANCES OF SAID SPEECH WAVE, FIRST FUNCTION GENERATING MEANS FOR OBTAINING FROM SAID GLOTTAL AREA WAVE A BANDWIDTH VARIATION SIGNAL INDICATIVE OF A SELECTED RELATIONSHIP BETWEEN THE BANDWIDTHS OF SAID SPEECH RESONANCES AND THE AREA OF SAID GLOTTIS, SECOND FUNCTION GENERATING MEANS FOR OBTAINING FROM SAID GLOTTAL AREA WAVE A FREQUENCY VARIATION SIGNAL INDICATIVE OF A SELECTED RELATIONSHIP BETWEEN THE FREQUENCIES OF SAID SPEECH RESONANCES AND THE AREA OF SAID GLOTTIS, A PLURALITY OF MULTIPLYING MEANS IN ONE-TO-ONE CORRESPONDANCE WITH SAID FREQUENCY CONTROL, SIGNALS, EACH OF SAID MULTIPLYING MEANS BEING PROVIDED WITH FIRST AND SECOND INPUT TERMINALS AND AN OUTPUT TERMINAL, MEANS FOR SIMULTANEOUSLY APPLYING SAID FREQUENCY VARIATION SIGNAL TO THE FIRST INPUT TERMINAL OF EACH OF SAID MULTIPLYING MEANS, MEANS FOR APPLYING EACH OF SAID FREQUENCY CONTROL SIGNALS TO THE SECOND INPUT TERMINAL OF THE CORRESPONDING MULTIPLYING MEANS SO THAT THE PRODUCT SIGNALS DEVELOPED AT THE OUTPUT TERMINALS OF SAID MULTIPLYING MEANS INDICATE BOTH THE FREQUENCIES OF SELECTED RESONANCES OF SAID SPEECH WAVE AND VARIATIONS IN SAID RESONANCE FREQUENCIES ARISING FROM SAID SELECTED RELATIONSHIP BETWEEN SAID FREQUENCIES AND THE AREA OF SAID GLOTTIS, AND MEANS SUPPLIED WITH SAID BANDWIDTH VARIATIONS SIGNAL AND SAID PRODUCT SIGNALS FOR SYNTHESIZING A PLURALITY OF ARTIFICIAL RESONANCES TO FORM A REPLICA OF SAID SPEECH WAVE SAID ARTIFICIAL RESONANCE CLOSELY FOLLOWING IN BANDWIDTH AND FREQUENCY AND SAID SELECTED RESONACE OF SAID SPEECH WAVE.