Steganographic Encoding and Detecting for Video Signals
AssigneeDigimarc Corporation
InventorGeoffrey B. Rhoads
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Abstract
Aspects of the invention relate generally to steganography, data hiding and/or digital watermarking for video and other media signals. One claim recites a method including: obtaining a media signal comprising a message steganographically embedded therein; obtaining information obtained from the media signal; adjusting a message detection process with reference to the information; and detecting the message from the media signal according to the adjusted message detection process. Of course, other combinations are provided as well.
Claims38
A method comprising:
- obtaining a plural-bit identifier;
- obtaining a signal representing video data;
- cyclically applying the plural-bit identifier to the signal representing video data at the time of or as part of distribution of the video data, the plural-bit identifier being steganographically applied to the signal representing video data;
- wherein said act of applying utilizes one or more pre-computed carrier signals.
A method comprising:
- obtaining video;
- processing data representing at least some portions of the video to hide a plural-bit payload therein, the plural-bit payload comprising at least a first portion and a second portion, the first portion representing public information, and the second portion representing private information.
A method comprising:
- determining features associated with video content;
- using the features or information derived from the features to adjust a watermark component;
- steganographically embedding the adjusted watermark component in the video content.
A method comprising:
- determining features associated with video content;
- dynamically adjusting a watermark component based on at least the features;
- and
- steganographically embedding the adjusted watermark component in the video content.
A method comprising:
- obtaining a media signal comprising a message steganographically embedded therein;
- obtaining information from the media signal;
- adjusting a message detection process with reference to the information;
- detecting the message from the media signal according to the adjusted message detection process.
A method of hiding a plural-bit message in a video signal comprising:
- obtaining data representing elements of a video signal;
- altering a first set of the elements in accordance with a first bit of the message;
- altering a second set of the elements in accordance with a second bit of the message.
A method of hiding at least a watermark element in a video signal comprising:
- obtaining data representing elements of a video signal;
- altering a first set of the elements in accordance with the watermark element,
- wherein at least some of the first set of elements receive different amounts of altering relative to one another to hide the watermark element in the video signal.
A method comprising:
- obtaining a media signal;
- steganographically hiding information in data representing the media signal, wherein the information comprises at least device independent instructions;
- providing the media signal with the information steganographically hidden therein.
A method comprising:
- obtaining first data representing an electronic or physical object;
- transmitting at least a portion of the first data to a remote server;
- receiving, from the server, data indicating which information from the electronic or physical object should be evaluated;
- evaluating indicated information;
- transmitting a result of said act of evaluating to the server;
- receiving, from the server, an indication concerning the result.
Dependencies are inferred from the claim text.