Media Bitstream Integrity Signaling With Secure Segment Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video coding standards lack mechanisms to verify if an image or video is from a certified source, has not been tampered with, or is losslessly encoded, and the current decoded picture hash SEI message is not secure enough.
Innovation Solution
Implement secure hash functions like SHA-2 and SHA-3, along with digital signatures, to signal the integrity of image, video, or audio content, and use trusted timestamping to ensure authenticity and integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If verification information is signaled in the bitstream to ensure integrity, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the media content into segments (e.g., slices, tiles, or coding tree units) and applies verification information to specific portions rather than the entire media stream. This allows integrity verification to be performed on manageable segments, reducing the computational complexity while maintaining reliable verification capability.
Solution Approach 2:
The patent introduces verification information as an intermediary element in the bitstream that carries integrity data without requiring complex processing. This intermediary structure enables reliability verification through simple comparison operations rather than complex cryptographic or computational processes.
2Reliability
If secure hash functions and digital signatures are implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies hash functions and digital signatures selectively to specific portions or segments of the media content rather than processing the entire stream. This partial application reduces the computational burden while still providing sufficient security and integrity verification for the protected content.
Solution Approach 2:
The patent employs different hash functions (e.g., SHA-2, SHA-3) and cryptographic parameters adapted to the specific verification needs. By selecting appropriate cryptographic parameters and algorithms, the system achieves reliable integrity verification without requiring excessive computational complexity.
3Reliability
If verification information is added to the bitstream, then reliability is improved, but loss of information increases
Solution Approach 1:
The patent applies verification information locally to specific segments or portions of the media content rather than adding verification data to the entire stream. This localized approach ensures that only the necessary verification information is transmitted, minimizing bandwidth consumption while maintaining reliable integrity verification for the protected portions.
Solution Approach 2:
The patent uses hash values and verification information as compact representations or copies of the original media segments. Instead of transmitting the full media data, only the verification information (hash values, digital signatures) is added to the bitstream, significantly reducing the amount of information transmitted while maintaining verification capability.
Data Source
AI summary
A method of digital media processing includes performing a conversion between a media segment and a bitstream of the media segment. The conversion conforming to a format rule and an encryption rule. The format rule specifying that verification information, which includes an indication of an integrity of a portion of the media segment, is signaled in the bitstream.