Patent ID: 8208683

Claim:
A digital watermark embedding method for embedding embedding information, as digital watermark, into an input signal having dimensions equal to or greater than N that is an integer equal to or greater than 2 such that it is imperceptible to human senses in a digital watermark embedding apparatus including embedding sequence generation means, array generation means, modulation means, storage means, and embedding pattern superimposing means, wherein, the embedding sequence generation means generates an embedding sequence based on the embedding information to store it in first storage means; the array generation means generates a N−1-dimensional pattern based on the embedding sequence in the first storage means; the modulation means modulates a periodic signal according to a value on the N—1-dimensional pattern to generate a N-dimensional embedding pattern and store it in a second storage means; and the embedding pattern superimposing means obtains the N-dimensional embedding pattern stored in the second storage means to superimpose the embedding pattern on the input signal so as to embed it.