1. A pitch lag predictor for use by a speech decoder to generate a predicted pitch lag parameter, the pitch lag predictor comprising: a summation calculator configured to generate a first summation based on a plurality of previous pitch lag parameters, and further configured to generate a second summation based on a plurality of previous pitch lag parameters and a position of each of the plurality of previous pitch lag parameters with respect to the predicted pitch lag parameter; a coefficient calculator configured to generate a first coefficient using a first equation based on the first summation and the second summation, and further configured to generate a second coefficient using a second equation based on the first summation and the second summation, wherein the first equation is different than the second equation; and a predictor configured to generate the predicted pitch lag parameter based on the first coefficient and the second coefficient.