Variable Digital Watermark Protocol Segmentation
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Solution Overview
Problem
Digital watermarking systems face challenges in flexibility, as changes to message coding protocols, such as format, syntax, and length, can render deployed readers obsolete, making it difficult to adapt to changing requirements without upgrading or reprogramming existing readers.
Innovation Solution
The implementation of a variable message protocol method that includes a fixed message protocol portion for error robustness and a variable protocol portion with error robustness coding, allowing for backward and forward compatibility, enabling the embedding and decoding of digital watermarks in a way that is imperceptible to humans but readable by automated systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the message coding protocol is changed to adapt to new requirements, then the system flexibility and adaptability are improved, but the deployed readers become obsolete and cannot read the watermarks
Solution Approach 1:
The message protocol is segmented into a fixed header portion and a variable payload portion. The header contains protocol version information and format specifications that remain consistent across versions, while the payload can vary to accommodate different message types and requirements. This segmentation allows readers to parse the header to understand the protocol version and structure, then appropriately interpret the variable payload section.
Solution Approach 2:
The message protocol incorporates dynamic versioning through the header field, allowing the protocol structure to adapt to new requirements while maintaining a stable interface. Readers dynamically adjust their parsing and interpretation based on the version information in the header, enabling support for multiple protocol versions without rendering deployed readers obsolete.
2Adaptability or versatility
If the message protocol format and syntax are modified to improve functionality, then the system versatility is enhanced, but the deployed readers can no longer decode the watermarks
Solution Approach 1:
The protocol header is prepared in advance with version identification and format specification information before the actual message payload. This preliminary action allows readers to预先 know how to interpret the subsequent payload data, maintaining ease of operation through a consistent parsing approach while allowing the payload content to evolve with new formats and syntax.
3Reliability
If error robustness coding is applied to the variable protocol portion, then the message reliability is improved, but the message length and complexity increase
Solution Approach 1:
Error robustness coding is applied selectively to specific portions of the message protocol rather than uniformly across the entire message. The header portion may use simpler encoding while the variable payload portion can employ more robust error correction schemes appropriate to its content and requirements. This local quality approach improves reliability where needed while minimizing overall protocol complexity.
Data Source
AI summary
The present invention provides encryption techniques useful with digital watermarking payloads. One claim recites: a method to secure a first digital watermark payload and a second digital watermark payload through encryption of only one of the first digital watermark payload or the second digital watermark payload. The method includes: utilizing a multi-purpose computer processor configured to: provide information redundantly in the first digital watermark payload and the second digital watermark payload, yet the first digital watermark payload includes at least some information that is unique relative to at least the second digital watermark payload; encrypt the first digital watermark payload; embed a first digital watermark in media, the media representing audio, imagery or video, the first digital watermark comprising the encrypted first digital watermark payload; and embed a second digital watermark in the media, the second digital watermark comprising the second digital watermark payload. Of course, additional claims and combinations are provided.