Dual Watermark Content Identification System
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Solution Overview
Problem
Conventional methods for identifying media content are plagued by inaccurate location information, particularly indoors, and privacy concerns related to user location data, which hinders effective content customization and advertising.
Innovation Solution
A system that uses a combination of global and local watermarks, where the local watermark is a unique identifier for the content presentation location, incorporating additional local information such as temperature, crowd density, and noise level to enhance location accuracy and privacy, allowing for context-specific advertisements without disclosing the user's location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS, WiFi and/or 3G triangulation is used to provide location information, then location information can be obtained, but the location information becomes inaccurate particularly indoors and privacy concerns arise
Solution Approach 1:
The patent divides the identification system into two independent parts: global watermark containing content identification data, and local watermark containing location information. This segmentation allows the location data to be extracted locally without transmitting sensitive information to remote servers, thus resolving the privacy concern while maintaining accurate location identification capability.
Solution Approach 2:
The patent introduces a local watermark as an intermediary carrier that embeds location information directly in the media content. Instead of using GPS, WiFi, or 3G triangulation which require external infrastructure and raise privacy issues, the local watermark acts as a self-contained intermediary that provides accurate location data indoors without external signal dependency.
2Adaptability or versatility
If location information is transmitted to servers for content identification, then content customization is enabled, but user privacy is compromised
Solution Approach 1:
The patent extracts location information from the media content itself through the local watermark, separating it from the need to transmit user device location data to servers. The extracted local watermark data contains sufficient location information for content customization without requiring the server to receive or process sensitive user location information, thus enabling content adaptation while protecting privacy.
3Measurement precision
If conventional watermarking is used for content identification, then content identification is achieved, but location-specific customization and advertising are limited
Solution Approach 1:
The patent merges global watermarking (for content identification) with local watermarking (for location information) into a unified system. The global watermark provides accurate content identification, while the locally embedded watermark adds location-specific data. This combination enables both precise content identification and location-specific customization, including targeted advertising based on the extracted location information without compromising either function.
Data Source
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AI summary
The invention relates to a method for identifying content, preferably media content for publishing comprising the steps of a) Providing a content element for a user, b) Marking the content element with a global mark, c) Marking the content element with a local mark, d) Presenting the marked content element, e) Detecting at least part of the presented content element, f) Extracting the global mark and the local mark from the detected part of the content element, g) Identifying the extracted local mark and the global mark, and h) Identifying the content element based on the global and local mark. The invention relates also to a corresponding system and a use of the method and the system.