vqdecode.m

来自「wav声音文件的通过多脉冲激励编码器」· M 代码 · 共 44 行

function parameter=VQdecode(codeNum,CodeBoundary,dim1,dim2,filename)
parameter=zeros(dim1,dim2);
parameter1=zeros(dim1,dim2);
parameter2=zeros(dim1,dim2);
fid=fopen(filename,'rb'); 
if(fid==-1) 
display('File not exist!'); 
return; 
end 
binarynumber=1;
while(~feof(fid)) 

     str=fscanf(fid,'%s',1);
     if isempty(str)==0

        for i=1:codeNum
           if(str(codeNum-i+1)=='1')
            parameter2(ceil(binarynumber/(dim2+1)),mod(binarynumber,(dim2+1)))=parameter2(ceil(binarynumber/(dim2+1)),mod(binarynumber,(dim2+1)))+2^(i-1);
             if CodeBoundary(1)<0 & CodeBoundary(2)>0
              CodeBoundarylow=round(CodeBoundary(1)*10000);
              parameter1(ceil(binarynumber/(dim2+1)),mod(binarynumber,(dim2+1)))=(parameter2(ceil(binarynumber/(dim2+1)),mod(binarynumber,(dim2+1)))+CodeBoundarylow)/10000;
             else
                  parameter2(ceil(binarynumber/(dim2+1)),mod(binarynumber,(dim2+1)))=parameter2(ceil(binarynumber/(dim2+1)),mod(binarynumber,(dim2+1)))+CodeBoundary(1); 
             end
          end
        end

       binarynumber=binarynumber+1;
       if mod(binarynumber,(dim2+1))==0
                binarynumber=binarynumber+1;
       end
           
       
    end
end
fclose(fid);
if CodeBoundary(1)<0 & CodeBoundary(2)>0
     parameter= parameter1;
else
     parameter= parameter2;
end