DRM Content Stream Transmission with Forensic Watermarking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional DRM technologies are inefficient in inserting forensic watermarks into decrypted content, requiring decrypting, decompressing, re-compressing, and re-encrypting, which is time and cost-intensive, and unable to securely transmit HD content or handle multiple streams effectively.
Innovation Solution
A DRM content stream transmission system that inserts forensic watermarks by dividing content into segments, creating multiple patterns, encrypting them, and selecting one based on user identification information, allowing for real-time secure streaming without initial DRM encryption, enabling reverse traceability of leaked content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional DRM technology is used to insert forensic watermarks into decrypted content, then content security is improved, but processing time and cost increase significantly due to decrypting, decompressing, re-compressing, and re-encrypting
Solution Approach 1:
The patent applies preliminary action by inserting forensic watermarks into the original content before compression and encryption operations. The watermark insertion unit embeds user identification information and forensic marks into the original content, which is then compressed and encrypted in subsequent steps. This eliminates the need for decrypting and re-compressing content later to insert watermarks, significantly reducing processing time while maintaining security.
2Reliability
If conventional DRM technology is used to insert forensic watermarks, then content traceability is improved, but device complexity and processing overhead increase due to multiple decryption and encryption operations
Solution Approach 1:
The system performs watermark insertion with user identification information before compression and encryption. The watermark insertion unit embeds traceability data into the original content, which then flows through compression and encryption units without requiring decryption. This preliminary action simplifies the overall processing chain and reduces device complexity.
Solution Approach 2:
The patent segments the content processing into distinct functional units: a watermark insertion unit that embeds forensic marks, a compression unit, and an encryption unit. Each unit operates independently on the content stream, allowing parallel processing and reducing overall system complexity while maintaining traceability capabilities.
3Measurement precision
If forensic watermarks are inserted after decryption, then watermark accuracy is improved, but processing speed decreases due to the need to decrypt content first
Solution Approach 1:
The system inserts forensic watermarks into the original content before compression and encryption operations. The watermark insertion unit processes the uncompressed original content, ensuring accurate embedding of user identification information and forensic marks. This preliminary watermark insertion maintains high accuracy while enabling parallel compression and encryption operations, significantly improving processing speed.
4Reliability
If conventional DRM streaming is used, then content protection is improved, but the system cannot handle multiple streams or HD content effectively due to processing bottlenecks
Solution Approach 1:
The patent divides the content processing into independent functional units that can operate in parallel: watermark insertion, compression, and encryption. This segmentation allows the system to handle multiple content streams simultaneously and process HD content without bottlenecks, while maintaining content protection through encryption.
Solution Approach 2:
By performing watermark insertion before compression and encryption, the system eliminates the need to decrypt content for watermarking operations. This preliminary action removes a major processing bottleneck, enabling the system to handle multiple high-definition content streams concurrently while maintaining security and traceability.
Data Source
AI summary
A content stream transmission apparatus with reverse traceability comprises a pattern insertion unit dividing the original content in units of segments and inserting at least two patterns to each segment and creating at least two pattern contents; an encryption unit encrypting the at least two pattern contents; a content selection unit selecting one of the at least two pattern contents based on user identification information; and a transmission unit transmitting the selected pattern content to a user device. Therefore, as copyright and leakage tracking information are enabled to be inserted into the contents in real-time, the present invention not only provides security-enhanced contents but also services real-time content streaming services.