Frames of video and image data are processed to convey plural bits of hidden auxiliary data. The auxiliary data can be used for identification purposes, for device control (disabling video recording and the like), etc. The claimed arrangement uses a data embedding technique wherein the value of single...http://www.google.com/patents/US6400827?utm_source=gb-gplus-sharePatent US6400827 - Methods for hiding in-band digital data in images and video
