产生一个幅度为1，频率为w=1的正弦序列，采用非均匀8级量化和16级量化（类似A律13折线的方法），在同一坐标系内绘出原始信号和量化信号的曲线，并计算量化的S/N-Generating an amplitude of 1 and a frequency of the sinusoidal sequence w = 1, the use of non-uniform quantization 8 and 16 quantization (similar to Method A-law broken line 13), the original signal and the quantized signal curves plotted in the same coordinate system, and calculating the quantized S/N