Digital watermarking is the act of hiding a message related to a digital signal (i.e. an. image, song, video) within the signal itseclosely related to lf. It is a concept. steganography, in that they both hide a message inside a digital signal. However, what. separates them is their goal.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  extrude(Verb) To push or thrust out. 2  extrude(Verb) To form or shape (a metal, plastic etc.) by forcing it through a die or an opening.
Disc extrusion definition. By Michael Perry, M.D. Disc extrusion is a degenerative disc disease that occurs when a disc in the spine tears or bulges under the constant pressure or surrounding vertebrae. In some severe cases, the outer layer of the disc can tear, allowing inner disc fluid to leak into the spinal canal.