Video Distribution Device Watermarking Without Re-encoding
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Solution Overview
Problem
Video distribution sites face high processing loads due to the need for re-encoding when applying digital watermarks, especially with high-resolution content, and there is a risk of unauthorized watermark embedding without a third-party witness.
Innovation Solution
A method that distributes video content with embedded watermarks without re-encoding, using a blockchain network to record watermark-related information and superimpose the watermark video on the playback, ensuring secure and tamper-resistant tracking of digital watermarks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital watermarking is applied through re-encoding, then watermark information can be embedded in video content, but processing load increases significantly especially for high-resolution content
Solution Approach 1:
The patent divides the watermarking process into two independent segments: (1) generating a watermark video separately from the original video content, and (2) superimposing the watermark video onto the original video during playback. This segmentation eliminates the need for re-encoding the original video while still achieving reliable watermark embedding, thereby resolving the contradiction between watermark reliability and processing efficiency.
Solution Approach 2:
The patent introduces an intermediary watermark video that carries the watermark information. Instead of directly embedding watermarks into the original video through re-encoding, the system creates a separate watermark video file that is then superimposed on the original video during playback. This intermediary approach allows watermark embedding without the heavy processing load of re-encoding high-resolution content.
2Loss of information
If watermark information includes distributor and distribution destination details, then tracking capability improves, but vulnerability to unauthorized watermark embedding increases without third-party verification
Solution Approach 1:
The patent introduces a blockchain system as a neutral intermediary to verify and record watermark information. The blockchain acts as a third-party witness that independently verifies the authenticity of watermark data including distributor and distribution destination details. This intermediary verification mechanism prevents unauthorized watermark embedding while maintaining comprehensive distribution tracking information.
Solution Approach 2:
The system implements a feedback mechanism where watermark information is verified against blockchain records before being accepted. The blockchain provides continuous feedback on the authenticity of watermark data, ensuring that only authorized watermarks with valid distribution destination information are embedded. This feedback loop maintains both comprehensive tracking and authentication reliability.
Data Source
AI summary
A digital watermark is applied to a video to be distributed without re-encoding. A content distribution device 1 receives a content acquisition request to request video content, distributes the video content based on the content acquisition request, generates and distributes a watermark video with a watermark ID embedded, and causes watermark-video-related information including the watermark ID to be recorded, and a content playback device 2 transmits the content acquisition request, receives the video content and the watermark video, plays back and displays the video content, and superimposes the watermark video on the video content for playback and display.