What are public watermarking, lind watermarking, semi-blind watermarking, private watermarking, on-blind watermarking and asymmetric watermarking ?
There as been some confusion about the naming of various types of watermarking techniques and the main reason is that people involved in this field come from different backgrounds (in particular signal processing and computer security). On top of this some terminology has been imported from the related field of steganography. Originally, public watermarking and blind watermarking mean the same, but the wording was confusing with public-key watermarking. ‘Signal processing people’ took over the field, so only the later tends to remain. In these schemes, the cover signal (the original signal) is not needed during the detection process to detect the mark. Solely the key, which is typically used to generate some random sequence used during the embedding process, is required. These types of schemes can be used easily in mass market electronic equipment or software. In some cases you may need extra information to help your detector (in particular to synchronise its random sequence on the pos
