【数字信号调制】基于PCM实现信号编码调制含Matlab源码

1 简介

所谓的PCM(pulse code modulation)编码指的是把模拟电视(视频或音频)信号,通过取样(时间上离散化)、量化(幅度上离散化)处理后变换成在时间、幅度上均离散化的信号,再用二进制数码表示的脉冲编码调制信号(PCM),如图1所示.

2 部分代码

function varargout = PCM(varargin)% PCM M-file for PCM.fig%      PCM was designed in order to show how PCM works%%      To simplify the undesrtanding of this method, the program first takes%      a sine wave. Then you can choose a sampling scheme, and you can see%      the output of the sampler. You can choose one out of three sampling %      methods.%      If you choose natural sampling; then you will have the chance to modify%      the sampling window, and see the effects of this change in the output of%      the sampler.%%      Once you got the sampled signal you can quantize it by a method that is %      known as two rules and an alorithm.<

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