The disclosure describes methods for using digital water marking to authenticate digital
media signals, such as images, audio and video signals. It also describes techniques for …

The disclosure details methods of measuring the quality of service of received media signals
by analyzing digital water marks embedded in Such signals. The quality of a received Video …

The invention provides methods and systems for detecting and characterizing alterations of
media content, such as images, video and audio signals, using Watermark messages to …

The invention provides methods and Systems for detecting and characterizing alterations of
media content, Such as images, Video and audio Signals, using watermark messages to …

The present invention relates to watermarking of compressed audio or video? les. One claim
recites a method including: obtaining a copy of a compressed audio or video? le; decom …

BACKGROUND Digital watermarking is a process for modifying physical or electronic media
content to embed a hidden machine readable code into the media. In digital watermarking, a …

(57) ABSTRACT A method for decoding auxiliary data from media signals in multimedia
content decodes watermarks from different media Signals and uses the watermarks to …

(57) ABSTRACT A method is provided for authenticating a media signal and related
Software, Systems and applications. A digital water mark is embedded in the media signal. A …

The following Sections describe applications for integrat ing watermarks in multimedia data.
In general, these appli cations exploit Some level of interaction between water marks and/or …

Digital watermark methods for encoding auxiliary data into a host signal are used to
authenticate physical and electronic objects. One Such method computes a content specific …