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图像的差值脉冲编码调制，通过预测器中现有系数进行预测，并统计预测误差，再用量化器进行量化-Differential pulse code modulation of the image, through the existing coefficient in the predictor to predict, and statistical prediction error and quantize
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JPEG压缩编码的主要步骤有：
1.通过前向离散余弦变换减少图像数据相关性；
2.利用人眼的视觉特性队DCT系数进行量化；
3.使用查分脉冲编码调制对直流系数进行编码；
4.对交流系数进行Z形扫描，使用形成长度编码队交流系数进行编码；
5.熵编码器对上述描述符进行熵编码。-JPEG compression encoding of the main steps are:
1.forward discrete cosine transform to reduce the im
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脉冲编码调制程序，采用A律和u律，可在GUI中显示变换前后波形区别并播放声音。-A Pulse Code Modulation program based on A-law and u-law. Can display in the GUI waveform before-and-after difference and play the sound.
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掌握脉冲编码调制原理；
理解量化级数、量化方法与量化信噪比的关系
-Grasp the pulse code modulation principle
Understanding of quantization levels, and quantitative methods to quantify the relationship between SNR
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PCM通信系统脉冲编码调制的信源编码,可以运行,模拟PCM的编码的波形！(PCM pulse code modulation communication system source code, you can run, simulation of the PCM coding waveform!)
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By matlab code, Complex modulation coherent pulse train signal, Chaos indicator for Lyapunov index calculation.
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