Digital Watermark Payload Interpretation via Sub-Type Identifiers
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Solution Overview
Problem
Digital watermarking systems face challenges in accurately interpreting payload items due to variations in bit sequences, formats, and syntax, making it difficult to discern the semantic meaning of decoded payload items, especially when different payload item sub-types are represented by similar bit sequences or formats.
Innovation Solution
The proposed solution involves creating a message structure with a payload field that conveys a payload item sub-type identifier, which indicates the meaning of the payload item, allowing for accurate interpretation by referencing the sub-type identifier, and optionally using indirect links to remote databases for further information retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If payload items are encoded using similar bit sequences or formats for different sub-types, then the encoding efficiency and compactness are improved, but the interpretation accuracy and semantic discernibility deteriorate
Solution Approach 1:
The patent segments the payload field into multiple sub-fields, including a payload item identifier field and a payload item sub-type identifier field. This segmentation allows the system to maintain compact encoding while enabling accurate interpretation by separately identifying the type and subtype of each payload item, thus resolving the contradiction between encoding efficiency and interpretation accuracy.
Solution Approach 2:
The patent introduces an intermediary sub-type identifier field that acts as a mediator between the compact bit sequence encoding and the semantic interpretation. This intermediary element carries additional classification information without significantly increasing the overall payload size, enabling accurate distinction between different payload sub-types while maintaining encoding efficiency.
2Adaptability or versatility
If a remote network database is used to store payload information, then the flexibility and scalability of the system are improved, but the system complexity and dependency on external resources increase
Solution Approach 1:
The patent implements a dynamic payload interpretation system where the decoder can adaptively determine whether to use local interpretation rules or query remote databases based on the payload item sub-type identifier. This dynamic approach allows the system to maintain flexibility and scalability while managing complexity by only engaging external resources when necessary.
Solution Approach 2:
The patent creates a universal payload structure that can accommodate both simple payloads interpretable locally and complex payloads requiring remote database queries. The same payload field format and decoding mechanism handle both cases, providing multi-functionality that improves adaptability while avoiding the need for separate systems for different payload types.
3Measurement precision
If the payload field contains detailed semantic information, then the interpretation accuracy is improved, but the payload size and encoding complexity increase
Solution Approach 1:
The patent adds a new dimension to the payload structure by introducing a sub-type identifier field that provides semantic classification information without significantly increasing the payload size. This dimensional addition allows the system to achieve accurate interpretation by classifying payload items into categories, with detailed semantics retrieved only when necessary from remote sources.
Data Source
AI summary
The disclosure relates to digital watermarking, steganography, and specifically to message coding protocols used in conjunction with digital watermarking and steganographic encoding/decoding and payload interpretation methods. One claim recites a method for interpreting a data structure having fixed and variable message portions, the method comprising: processing the fixed message portion to determine a version of the variable message portion; decoding the entire payload field of the variable message portion according to the determined version; and interpreting only a portion of the decoded payload field according to the determined version. Of course, other features and claims are provided too.