from Huffman coding and decoding for Text compression by Jeny Rajan
Text compression and decompression with static huffman coding.

PW=b2d(tp,num)
function PW=b2d(tp,num)
PW=0;
j=0;
for i=num:-1:1
PW=PW+pow2(tp(i),j);
j=j+1;
end
return

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