Dynamic Watermark Embedding in Multimedia Content
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Solution Overview
Problem
Conventional watermarking methods in multimedia content introduce significant distortion and visibility issues, as they embed watermark information in a fixed or predetermined manner, affecting the viewing experience and potentially requiring removal of the watermark to maintain content quality.
Innovation Solution
Dynamic embedding of watermark information or end-user access information into multimedia content by selecting specific pixel blocks and coefficients based on actual analysis, reducing the number of coefficients modified and distributing the information across multiple blocks or peripheral areas, thereby minimizing distortion and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If watermark information is embedded into multimedia content using conventional fixed or predetermined methods, then the watermark can be effectively embedded for identification and ownership verification, but significant distortion and visibility issues are introduced that affect the viewing experience
Solution Approach 1:
The patent applies dynamics by transitioning from fixed or predetermined watermark embedding locations to dynamically selected locations based on actual content analysis. The system analyzes the multimedia content to identify optimal embedding positions that minimize visual impact while ensuring reliable watermark detection, making the embedding process adaptive rather than static.
Solution Approach 2:
The patent implements local quality by distributing watermark information across multiple selectively chosen blocks or coefficients rather than using a uniform embedding approach. This allows different regions of the content to have different embedding characteristics, placing watermarks in areas that are less visually sensitive while maintaining overall reliability.
2Reliability
If the number of coefficients modified for watermark embedding is increased to ensure reliable watermark detection, then the watermark authentication becomes more robust, but the distortion and visibility of the embedded information increases
Solution Approach 1:
The patent applies segmentation by dividing the watermark information into multiple portions and embedding them across different selected blocks or coefficients throughout the multimedia content. This distribution strategy ensures that the watermark can be reliably authenticated through multiple points while minimizing the impact on any single region, thereby reducing overall visibility and distortion.
3Ease of manufacture
If watermark information is embedded in a predetermined manner according to a given algorithm, then the embedding process is simple and consistent, but the viewing experience is degraded due to fixed embedding locations that may not be optimal for content quality
Solution Approach 1:
The patent implements preliminary action by performing content analysis before the actual watermark embedding process. The system pre-identifies optimal embedding locations based on content characteristics, allowing the subsequent embedding to proceed efficiently with predetermined optimal positions that have already been selected to minimize visual impact.
Data Source
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AI summary
A method and devices for dynamically embedding watermark and/or end-user access information into multimedia content. The method includes providing multimedia content transformed into blocks that each include an array of pixel blocks, and dynamically embedding portions of watermark and/or end-user access information into selected pixel blocks based on the values of the coefficients within the pixel blocks. For multimedia content encoded using discrete cosine transform (DCT) or other block-based encoding, the transform coefficients to include embedded information are chosen based on analysis of the coefficient values, rather than in a fixed or predetermined manner. Also, embedding watermark and/or end-user access information can occur across different pixel blocks within a given image to reduce the number of embedded coefficients per block, within the peripheral pixel blocks within a given image, and/or in different areas across images to reduce the duration of embedded information in any one area.