floating point quantization

hello, I am working on an audio compression project as my final year dissertation in which I need to implement floating point quantization. I am stuck at a stage where i need to count the number of leading zeros in my array. can anyone please help me with this algorithm.

     1     0     0     0
     0     0     1     1
     0     1     1     0
     0     1     0     1
     0     0     0     1
     0     1     1     0
     0     0     1     1
     1     0     0     0

what I want is a fifth column that has the numers of leadind zeros in each row. So from the array above, my fifth coulmn should be 0 2 1 3 1 2 0

cheers!

Answer 1

[Fangjun Jiang]

     a=[1     0     0     0
     0     0     1     1
     0     1     1     0
     0     1     0     1
     0     0     0     1
     0     1     1     0
     0     0     1     1
     1     0     0     0];
b=cumsum(a,2);
c=b==0;
d=sum(c,2)

[God'sSon]

thanks for your answer.