16kb/s ADPCM编码系统中自适应预测算法的探讨

Discussion of Adaptive Prediction Algorithm for 16kb/s ADPCM Coding Systems

本文通过对三种不同的预测器(一阶固定预测器,CCITT自适应预测器以及归一化SG算法的自适应格型预测器)实现的16kb/S ADPCM编码系统的比较,对16kb/S ADPCM中自适应预测算法进行了探讨,结果表明:在16kb/S ADPCM中,采用归一化SG算法的自适应格型预测器能使系统在算法复杂度和系统性能之间得到较优的折衷。

By comparing 16kb/s ADPCM coding systems implemented by three different predictors (i.e. one order fixed predictor, CCITT adaptive predictor and adaptive lattice predictor emp- loying normalized SG algorithm), 16kb/s ADPCM adaptive prediction algorithm is discussed. The result shows that the use of adaptive lattice predictor employing normalized SG algorithm in 16kb/s ADPCM systems is a better compromise between the algorithm complexity and the system performances.