Digital Watermark Embedding for Content Outflow Route Specification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional technologies lack effective protection against unauthorized copying and distribution of broadcast and communication content after it is outputted from a receiver, as they cannot specify the outflow route of the content and suffer from quality deterioration due to double digital watermarking.
Innovation Solution
A reception device that embeds a digital watermark in the content using information specifying the outflow route, allowing for the identification of unauthorized use and reducing processing load by avoiding redundant watermarking, while using information from external equipment to determine if a digital watermark is already embedded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If both transmitting side and receiver side insert digital watermark independently, then each side can trace content origin, but picture quality deteriorates due to superimposition of multiple watermarks
Solution Approach 1:
The transmitting side embeds digital watermark information in advance before content distribution. The receiver side then uses this pre-embedded information to create the actual digital watermark for output content, avoiding the need for the receiver to independently embed a separate watermark that would cause superimposition and quality deterioration.
Solution Approach 2:
Digital watermark information acts as an intermediary between the transmitting side and receiver side. The transmitting side embeds this information, which then serves as the basis for the receiver to generate the final watermark, eliminating the need for independent watermark embedding by both parties and thus preventing quality loss from multiple watermark layers.
2Measurement precision
If receiver side embeds digital watermark without checking transmitting side's watermark, then outflow route can be specified, but processing load increases due to redundant watermarking
Solution Approach 1:
The receiver side checks for the presence of digital watermark information from the transmitting side before embedding its own watermark. This feedback mechanism allows the receiver to determine whether watermark embedding is necessary, avoiding redundant processing and reducing overall processing load while maintaining outflow route specification capability.
3Measurement precision
If transmitting side embeds receiver-unique ID in broadcast content, then content can be traced to specific receiver, but this is impossible in multicasting to many unspecified receivers
Solution Approach 1:
The digital watermark information is segmented into two parts: receiver-unique information embedded by the transmitting side for targeted content, and generator information embedded by the receiver side for output content. This segmentation allows broadcast content to include receiver identification while maintaining adaptability for multicasting to multiple unspecified receivers through the use of generator information that the receiver will use to create watermarks.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
There is provided a reception device including a content reception unit configured to receive content, a digital watermark information acquisition unit configured to acquire information specifying an outflow route for the content to create a digital watermark, and a content output unit configured to embed a digital watermark in the received content by using the acquired information and configured to output the content.