LOSSLESS DATA EMBEDDING

摘要

Many methods for reversible watermarking (embedding schemes that allow perfect reconstruction of the original host signal) are highly fragile in the sense that the slightest modification of watermarked content prohibits the recovery of both the original signal as well as the embedded auxiliary data. In order to obtain robustness against transmission or channel errors, the embedding method according to the invention accommodates error correction data in a portion of the data embedding capacity. In an advantageous embodiment, the host signal (36) is segmented in segments, and error correction data (p(n)) for a segment (S(n)) is accommodated in data (37) being embedded in a subsequent segment (S(n+l)) along with restoration data (r(n)) for reconstructing the host signal. The remaining portion of the embedding capacity is used for payload (w).