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Digital watermarking can be seen will information visible in the video or image. Most often this is in the form of a logo or text and used to own the media. The television networks have their logo in the corner of videos and this is a type of visible watermark.
The invisible kind of digital data is used to add images watermark logos to photos, because it is designed for general use and therefore is easily recovered. Either way, this is done for the purpose of raising awareness of the ownership of the materials. Other people are then unable to claim the work as their own and this is right.
One reason why this is done to protect the copyright of the material and prevent people from copying the material. A backup device restore the signal before you can start copying and since then the team will decide whether to copy the material or not. Source tracking is another type of application where the signal is embedded in the digital signal at all points of distribution.
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