how to decode to get the symbol number ?

Question

nur aqila 2018-4-5

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/392733-how-to-decode-to-get-the-symbol-number

Hi, I'm currently constructing a code for truncated Huffman.I already encoded the program, but I don't know how to decode it back. Below is my encode coding. Supposedly, the output from huff will be decoded back to get the symbol number just like the table I provide. Please help me

clear all
clc
%decode truncated
input = [ 1 7 6 2 5];
huff = [];
for i=1:length(input)
if input(i) < 3 %level1
    k = 1; %dec
    h1 = 0 ;
    h1 = dec2bin(h1,1);
    t = input(i)-k ;
    t1 = dec2bin(t,1);
elseif input(i) < 7   %level2
    k = 3;
    h1 = 2 ;
    h1 = dec2bin(h1,2);
    t = input(i)-k ;
    t1 = dec2bin(t,2);
elseif input(i) < 15   %level3
    k = 7;
    h1 = 6 ;
    h1 = dec2bin(h1,3);
    t = input(i)-k ;
    t1 = dec2bin(t,3);
elseif input(i)< 31 %level4
    k= 15;
    h1= 14;
    h1 = dec2bin(h1,4);
    t = input(i)-k ;
    t1 = dec2bin(t,4);
    huff_t4 = [h1 t1];
elseif input(i)< 63  %level5
    k= 31;
    h1= 30;
    h1 = dec2bin(h1,5);
    t = input(i)-k ;
    t1 = dec2bin(t,5);   
elseif input(i)< 127  %level6
    k= 63;
    h1= 62;
    h1 = dec2bin(h1,6);
    t = input(i)-k ;
    t1 = dec2bin(t,6);    
elseif input(i)< 255 %level7
    k= 127;
    h1= 126;
    h1 = dec2bin(h1,7);
    t = input(i)-k ;
    t1 = dec2bin(t,7);    
elseif input(i)< 511 %level8
    k= 255;
    h1= 254;
    h1 = dec2bin(h1,8);
    t = input(i)-k ;
    t1 = dec2bin(t,8);    
else
    k= 511; %level9
    h1= 510;
    h1 = dec2bin(h1,9);
    t = input(i)-k ;
    t1 = dec2bin(t,9);
end
huff = [huff h1 t1];
end
disp(huff)