Checksum Verification for Encrypted Content Format Conversion
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Solution Overview
Problem
The challenge in the audiovisual (AV) content distribution is the varying file formats supported by different playback systems, which necessitates a reliable method to verify the quality and integrity of content format conversion without transcoding video and audio streams, ensuring the same quality of video and audio data is maintained across different formats.
Innovation Solution
The method involves generating and comparing checksums for content files during and after format conversion, allowing verification of the conversion process's accuracy, even when encryption is involved, by using checksums like hash values or fingerprint functions, and applying this process across different formats such as MPEG-TS to MP4 or vice versa, with or without re-encryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If file format conversion is performed to support different playback systems, then adaptability is improved, but reliability of content integrity is worsened due to potential conversion errors
Solution Approach 1:
The patent applies preliminary action by generating checksums for the original content files before format conversion occurs. These pre-generated checksums are stored and later used to verify the integrity of converted files, allowing the system to proactively prepare verification mechanisms before conversion errors can occur.
Solution Approach 2:
The patent implements feedback by comparing checksums of original files with checksums of converted files. This feedback mechanism detects whether format conversion has introduced any data corruption or errors, allowing the system to identify and correct integrity issues that arise during conversion to different formats.
2Reliability
If checksum verification is implemented to ensure content integrity, then reliability is improved, but device complexity is worsened due to additional verification steps
Solution Approach 1:
The patent replaces complex manual verification processes with automated checksum calculation and comparison. Instead of requiring intricate verification mechanisms, the system uses simple mathematical hash functions to generate checksums that automatically verify content integrity, substituting mechanical complexity with computational simplicity.
Solution Approach 2:
The patent changes the verification approach from examining entire file contents to comparing condensed checksum parameters. This parameter transformation reduces the verification process from analyzing large amounts of data to comparing small hash values, significantly simplifying the verification mechanism while maintaining high reliability.
3Object-affected harmful factors
If content files are encrypted to protect intellectual property, then security is improved, but measurement precision is worsened due to difficulty in verifying converted content
Solution Approach 1:
The patent applies preliminary action by generating checksums for encrypted content files before format conversion. Since the checksum is generated from the original encrypted data, it serves as a reliable reference that remains valid even when the content is converted to different formats, allowing verification without needing to decrypt the content.
Solution Approach 2:
The patent uses checksums as an intermediary that bridges the gap between encrypted content protection and verification needs. The checksum acts as a mediator that can verify content integrity without requiring access to the actual encrypted data, thus maintaining security while enabling accurate verification of converted files.
Data Source
AI summary
Content conversion verification, includes: converting, at a first computer system, an original content file to a target format, generating a converted content file in the target format; generating a checksum for the converted content file; and sending the original content file and the checksum to a second computer system. Key words include content verification and checksum.