A Relative Phase Based Audio Integrity Protection Method: Model and Strategy

Algorithm 1

The algorithm of random embedding strategy based on relative phase.

  receiving the key vaults as kv (i);

  set the number of kv (i) as n;

  divide the audio signal equally into n segments as s (j);

  sampling the s (j) to c (j);

  c(j), initialize j=1;

  while! end do

if  jn  then

calculate the phase spectrum     of  s(j);

determine the position of the maxima and minima in  ;

calculate the coefficient matrix C (j) by    DCT of c(j);

if the maxima is in front of the minima then

embedding the kv (j) at C (2,2);

else

embedding the kv (j) at C (4,4);

end if

end if

  end while