| 摘要 |
The present invention relates to a method of watermarking an audio track by providing a database structure, assigning a unique number X to the audio track and partitioning the unique number X into N positions i, and N values v,, where i=1...N. For each position i of the number X, the method comprises generating a pseudorandom number R(i, vi) based on the position i and the value v, at the position i, adding a new node [vi,R(i,Vi)] at level i in the database structure, if not already present in the database structure, adding an edge from the preceding node [Vi-1, R(i-1,Vi-1 )] to the new node [vi,R(i,Vi)], generating, by using R(i, vi,) as a seed, a set of random complex numbers C, inserting the set into a vector V, calculating the inverse Fourier transform of vector V, and adding the thereby obtained time domain function y(t) to the audio track. |
