Steganographic system with changing operations
First Claim
1. In a decoding system that processes image or audio information to decode steganographically encoded auxiliary information therein, an improvement wherein a given set of steganographically encoded auxiliary information is interpreted a first way at a first time, and a second, different, way at a second, later, time.
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Accused Products
Abstract
Multi-bit auxiliary information is hidden in audio and imagery (e.g., digital photographs, video), using steganographic techniques. Such information can be used for various purposes, including identifying audio/imagery as originating from a particular source, copy control, etc. In some embodiments, operation of the system changes over time. This change may be triggered by various events, including passage of new information to the system through audio or imagery being processed.
99 Citations
9 Claims
- 1. In a decoding system that processes image or audio information to decode steganographically encoded auxiliary information therein, an improvement wherein a given set of steganographically encoded auxiliary information is interpreted a first way at a first time, and a second, different, way at a second, later, time.
Specification