已知语音文件求出其LPC系数后，调用a_lsf_conversion.m函数求其对应的LSF-Known find their voice files LPC coefficients, call a_lsf_conversion.m corresponding LSF function evaluation

将AMR的12.2k的语音编码的c代码转换为mex文件使其可以被matlab调用，在matlab2014中命令窗输入mex+空格+三个c文件名字（注意encode.c放在最前面）生成可执行文件，就可以调用encode函数。-The AMR 12.2k speech coding in C code conversion for mex file so that it can be called by the MATLAB. In the matlab2014 command window inp