Watermark Content Recognition with Shortened Payload Detection
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Solution Overview
Problem
Existing watermark-based content recognition systems face challenges in accurately and efficiently detecting watermark boundaries and establishing media time, particularly in short content segments, due to the limitations of preexisting databases and the need for quick recognition and precise boundary identification.
Innovation Solution
The system employs shortened payload designs and detector adjustments to enhance watermark extraction, using synchronization headers, bit-buffer techniques, and consistent stego keys to improve detection speed and accuracy, while minimizing data exchanges with a database.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional watermark extraction methods are used, then complete watermark symbols can be detected, but detection speed is slow and processing time is long
Solution Approach 1:
The patent extracts only a partial segment of the watermark payload (e.g., first N symbols) rather than waiting to extract the complete watermark. This partial extraction approach enables faster detection and identification of watermarked content without requiring full watermark decoding, thereby improving detection speed while reducing processing time.
Solution Approach 2:
The watermark payload is divided into multiple segments or symbols. The system processes and extracts these segments sequentially, allowing early detection based on the first few symbols without waiting for the entire watermark sequence. This segmentation enables faster content recognition while maintaining identification accuracy.
2Measurement precision
If traditional boundary detection methods are used, then watermark boundaries can be identified, but the precision of boundary detection is insufficient
Solution Approach 1:
The patent employs feedback mechanisms where the detector continuously monitors extracted watermark symbols and adjusts its detection parameters based on the quality and completeness of the extracted data. This feedback loop enables more precise boundary detection by validating watermark presence and position through iterative verification, improving measurement precision without proportionally increasing detector complexity.
Solution Approach 2:
The patent replaces traditional mechanical or sequential watermark boundary detection methods with signal processing techniques and mathematical algorithms. By using correlation analysis, pattern matching, and statistical methods, the system achieves higher boundary detection precision while avoiding the complexity of traditional step-by-step mechanical detection approaches.
3Reliability
If complete watermark extraction is performed, then accurate content identification is achieved, but data exchange with database and processing load increase
Solution Approach 1:
The patent extracts only the essential portion of the watermark payload required for content identification (such as the first N symbols or a truncated version) rather than extracting and processing the complete watermark. This selective extraction reduces the amount of data that needs to be exchanged with the database and processed, thereby improving productivity while maintaining sufficient content identification accuracy.
Solution Approach 2:
The system performs preliminary extraction of watermark symbols and conducts initial content identification before complete watermark decoding. This preliminary action allows the system to quickly determine content identity using partial watermark data, reducing the processing load and database exchanges required for full watermark verification, thus improving overall processing efficiency.
Data Source
AI summary
Method, devices, systems and computer program products are described that improve speed and accuracy of watermark detection from multimedia content, and allow faster and better content recognition. One technique for improving detection of boundaries of an embedded multimedia content segment includes detecting a synchronization header and a full watermark from the multimedia content, constructing a predicted watermark segment that is positioned at a predicted distance from the synchronization header, and comparing the group of candidate watermark symbols obtained from the multimedia content to the first predicted watermark segment to obtain a match. The disclosed techniques enable extraction of watermarks from short content segments, and can utilize a shortened payload design to establish media time during content usage.