基于RLS算法的ADPCM仿真和改进  

Simulation and Amelioration of ADPCM Based on RLS

作　　者：唐玉波[1] 徐珍妮[1] 

机构地区：[1]装备指挥技术学院研究生院,北京101416

出　　处：《兵工自动化》2005年第6期72-73,77,共3页Ordnance Industry Automation

摘　　要：基于递推最小二乘方(RLS)的自适应差分脉冲码调制(ADPCM)仿真,其信号输入RLS自适应前向滤波器。将期望输出和预计输出信号之差作为滤波器输出进入相应数学计算单元,经过预处理后的差分信号进入均匀量化单元,量化后的信号进入编码单元,并被转换成二进制码编码。ADPCM的改进使用短时傅立叶变换(STFT)。For the simulation of ADPCM based on RLS, the signal was inputted into the RLS adaptive-direction filter. The difference between the expectation output and the estimation output signal was used as the output of the filter to enter to the relevant math calculation unit. After pretreatment, the difference signal was entered to the uniform quantizing unit, and then the quantizing signal was sent to coding unit and it was transformed to binary coding. The STFT was adopted to ameliorate the ADPCM.

关 键 词：递推最小二乘方 自适应差分脉冲码调制 前向滤波器 傅立叶变换 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]