Bandwidth reduction system

Claim 1

APPARATUS FOR THE REDUCED BANDWIDTH TRANSMISSION OF SPEECH SIGNALS WHICH COMPRISES A SOURCE OF A SPEECH SIGNAL, MEANS FOR DIVIDING SAID SPEECH SIGNAL INTO A RELATIVELY NARROW BAND OF SELECTED LOW-FREQUENCY COMPONENTS AND A RELATIVELY WIDE BAND OF SELECTED HIGH-FREQUENCY COMPONENTS, MEANS FOR DERIVING FROM SAID BAND OF HIGHFREQUENCY COMPONENTS A PLURALITY OF REDUCED BANDWIDTH CONTROL SIGNALS REPRESENTATIVE OF A CORRESPONDING PLURALITY OF SELECTED SUB-BANDS OF SAID BAND OF HIGH-FREQUENCY COMPONENTS, MEANS FOR TRANSMITTING SAID BAND OF LOW-FREQUENCY COMPONENTS OF SAID SPEECH SIGNAL AND SAID CONTROL SIGNALS TO A RECEIVER STATION, AND, AT SAID RECEIVER STATION, MEANS FOR GENERATING FROM SAID BAND OF LOW-FREQUENCY COMPONENTS OF SAID SPEECH SIGNAL A PLURALITY OF SUB-BANDS OF HIGHER ORDER HARMONICS OF SAID LOW-FREQUENCY COMPONENTS TO FORM A PLURALITY OF UNIFORM AMPLITUDE EXCITATION SIGNALS IN ONE-TO-ONE CORRESPONDENCE WITH SAID CONTROL SIGNALS, SAID SUB-BANDS OF HIGHER ORDER HARMONICS CORRESPONDING IN FREQUENCY TO SAID SUB-BANDS OF HIGH-FREQUENCY COMPONENTS REPRESENTED BY SAID CONTROL SIGNALS, MEANS FOR INDIVIDUALLY ADJUSTING THE AMPLITUDE OF EACH OF SAID EXCITATION SIGNALS IN RESPONSE TO THE CORRESPONDING ONE OF SAID CONTROL SIGNALS TO RECONSTRUCT SAID SELECTED SUBBANDS OF HIGH-FREQUENCY COMPONENTS OF SAID SPEECH SIGNAL, AND MEANS FOR COMBINING SAID LOW-FREQUENCY COMPONENTS OF SAID SPEECH SIGNAL WITH SAID RECONSTRUCTED SUB-BANDS OF HIGH-FREQUENCY COMPONENTS TO SYNTHESIZE A REPLICA OF SAID SPEECH SIGNAL.