Digital Watermarking Dynamic Parameter Variation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional digital watermarks are often obvious and intrusive, compromising the artistic integrity of media and failing to protect against unauthorized use or tampering, as they can be easily replicated or removed from media streams.
Innovation Solution
Employing a combination of watermark concealment techniques that vary dimensional characteristics such as location, number of bits, pattern of bits, and noise over time within a signal, along with encryption, to make digital watermarks difficult to detect and remove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional digital watermarks are used, then the protection function is provided, but the watermarks become obvious and intrusive, compromising artistic integrity
Solution Approach 1:
The patent applies parameter changes by varying dimensional characteristics of the watermark over time, including location, number of bits, pattern of bits, and noise levels. This dynamic modification makes the watermark less detectable and less intrusive while maintaining its protection function, as the watermark continuously adapts its parameters to evade detection.
Solution Approach 2:
The patent implements dynamics by making the digital watermark changeable over time rather than static. The watermark's dimensional characteristics such as position, bit pattern, and noise are dynamically adjusted during media transmission, allowing the same protection function to be achieved through multiple varying configurations, thereby reducing detectability.
2Reliability
If conventional digital watermarks are used, then the protection function is provided, but the watermarks can be easily replicated or removed from media streams
Solution Approach 1:
The patent makes the digital watermark dynamic by varying its dimensional characteristics over time, including location, number of bits, pattern of bits, and noise levels. This continuous change makes the watermark difficult to detect, replicate, or remove, as any static detection method would fail to track the evolving watermark across different time points.
Solution Approach 2:
The patent employs periodic action by systematically varying the watermark parameters across multiple time points in a controlled manner. The watermark undergoes periodic transformations in its dimensional characteristics, creating a pattern of change that complicates detection and removal while maintaining the protection function throughout the media stream.
3Difficulty of detecting and measuring
If digital watermarks are varied over time to conceal them, then detection difficulty increases, but the complexity of the watermarking system increases
Solution Approach 1:
The patent manages system complexity by varying a limited set of dimensional parameters (location, number of bits, pattern of bits, noise levels) rather than completely redesigning the watermarking system. This approach achieves enhanced detectability through parameter modulation while keeping the overall system architecture relatively simple and manageable.
Data Source
AI summary
In one example, a method for inserting a digital watermark in a signal includes obtaining the signal comprising a plurality of frames, inserting a first digital watermark in a first frame of the plurality of frames, inserting a second digital watermark in a second frame of the plurality of frames, wherein the second digital watermark differs from the first digital watermark in at least one way selected from a group of: a location within a respective frame, a number of bits, a pattern of bits, and a number of bits of a noise, and outputting a watermarked signal including the first digital watermark in the first frame and the second digital watermark in the second frame.