13. The apparatus of claim 12 wherein the predictor signal h(i) is generated according to ##EQU8## where .alpha. is a parameter of predictor h(i), n is the current first speech pattern time frame and N is the last first speech pattern time frame.
13. The apparatus of claim 12 wherein the predictor signal h(i) is generated according to ##EQU8## where .alpha. is a parameter of predictor h(i), n is the current first speech pattern time frame and N is the last first speech pattern time frame. 14. The method of claim 13 wherein the parameter .alpha. is approximately 0.7.