PCMUQC 解码算法：MATLAB 实现

function [outData] = PCMUQC_Decode( inputData)

n=length(inputData); outData=zeros(1,n/8); MM=zeros(1,8); for kk=1:n/8 MM(1:8)=inputData(1,(kk-1)8+1:kk8); %取得8位PCM码

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% stuednt code %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%task:理解PCM编码原理，将8位PCM码MM中的二进制段落码转化为十进制数，将其值赋给temp。

temp = MM(1)*2^2 + MM(2)*2^1 + MM(3)*2^0;   

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
if temp==0 q=1; %段落内分成16份，每一份的长度 a=0; %段落内的起始值 end if temp==1 q=1; a=16; end if temp==2 q=2; a=32; end if temp==3 q=4; a=64; end if temp==4 q=8; a=128; end if temp==5 q=16; a=256; end if temp==6 q=32; a=512; end if temp==7 q=64; a=1024; end

R=(a+(  MM(5)*2^3+MM(6)*2^2+MM(7)*2+MM(8)   )*q+q/2)/2048; %译码 段内码计算量化值
if  MM(1)==0  %极性码判断正负
    R=-R;
end

outData(1,kk)=R;

end

end