3D Video Watermarking Using MVC Non-Referenced Regions
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Solution Overview
Problem
Conventional video processing systems lack effective methods for securely transmitting and protecting 3D video content, particularly in preventing illegal duplication, due to limitations in existing watermarking techniques for 3D video compression.
Innovation Solution
A method and system for asymmetrical rate control in 3D video compression that identifies and watermarks regions in base view and enhancement view videos not referenced by other pictures, using MPEG-4 Multi-view Video Coding (MVC) standards, to embed watermarks that are difficult to remove, and multiplexes these watermarked videos into a transport stream for secure transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional watermarking techniques are applied to 3D video compression, then some level of content protection is achieved, but the security and effectiveness of watermark embedding is insufficient
Solution Approach 1:
The patent segments the 3D video into base view and enhancement view components, applying watermarking selectively to specific regions and pictures in each view. This segmentation allows targeted embedding of watermarks in regions that are not referenced by other pictures, improving security while maintaining compression efficiency.
Solution Approach 2:
The patent applies local quality by watermarking only specific regions in specific pictures (those not referenced by other pictures) rather than uniformly across the entire 3D video. This selective approach enhances watermark security in critical regions while preserving compression efficiency in referenced regions.
2Reliability
If watermarking is applied to all regions in 3D video, then comprehensive protection is achieved, but compression efficiency and decoding performance deteriorate
Solution Approach 1:
The patent applies partial action by watermarking only a subset of regions (specifically, regions not referenced by other pictures) rather than all regions. This partial approach provides sufficient protection for unauthorized duplication while avoiding the compression overhead and decoding complexity that would result from watermarking every region.
Solution Approach 2:
The patent performs preliminary identification of non-referenced regions before watermark embedding. By pre-determining which regions should be watermarked based on reference relationships, the system avoids unnecessary watermarking operations in referenced regions, thereby maintaining compression efficiency.
3Productivity
If asymmetric rate control is applied to 3D video compression, then compression efficiency is improved, but complexity of the compression system increases
Solution Approach 1:
The patent implements dynamic asymmetric rate control where the encoder adapts bit allocation dynamically between base view and enhancement view based on actual content characteristics and reference relationships. This dynamic approach improves compression efficiency by optimizing resource allocation while managing system complexity through adaptive rather than fixed control mechanisms.
Data Source
AI summary
A video transmitter identifies regions in pictures in a compressed three-dimensional (3D) video comprising a base view video and an enhancement view video. The identified regions are not referenced by other pictures in the compressed 3D video. The identified regions are watermarked. Pictures such as a high layer picture in the base view video and the enhancement view video are identified for watermarking. The identified regions in the base view and/or enhancement view videos are watermarked and multiplexed into a transport stream for transmission. An intended video receiver extracts the base view video, the enhancement view video and corresponding watermark data from the received transport stream. The corresponding extracted watermark data are synchronized with the extracted base view video and the extracted enhancement view video, respectively, for watermark insertion. The resulting base view and enhancement view videos are decoded into a left view video and a right view video, respectively.