Video Stream Trust Checks Using Unique IDs and Substream Signatures
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Solution Overview
Problem
Existing video data stream trustworthiness checks lack adaptability to various application scenarios and are inefficient in terms of bitrate and compatibility with video data stream structures, particularly in streaming environments.
Innovation Solution
The solution involves a method for checking video data stream trustworthiness by incorporating a unique identifier and subjecting a portion of the stream to a hash function, verifying the hash value against a digital signature, and maintaining checkability through a track of editors, while allowing for scalable extraction of substreams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital signatures are provided for media assets by hashing and signing the entire media asset, then trustworthiness verification is achieved, but bitrate overhead increases and adaptability to streaming scenarios deteriorates
Solution Approach 1:
The patent segments the media asset into distinct portions (video data stream, audio data stream, subtitle data stream) and generates separate digital signatures for each portion. This allows selective verification of individual components without processing the entire media asset, reducing bitrate overhead while maintaining verification reliability.
Solution Approach 2:
The patent extracts essential verification elements (digital signatures and unique identifiers) from the complete media asset and embeds them as separate data structures within the stream. This extraction allows clients to verify trustworthiness using only the signature data rather than processing the entire media asset, significantly reducing bitrate overhead.
2Reliability
If digital signatures are provided for the entire media asset, then comprehensive trustworthiness check is achieved, but adaptability to video codec structures and extraction of substreams deteriorates
Solution Approach 1:
The patent divides the media asset into separately signed portions (video, audio, subtitles) with individual digital signatures. This segmentation enables adaptability to different application scenarios by allowing selective verification of specific portions or extraction of substreams with their corresponding signatures, while maintaining comprehensive trustworthiness verification when all portions are processed.
Solution Approach 2:
The patent creates a dynamic verification system where the scope of trustworthiness checking can be adjusted based on application needs. Clients can verify individual portions independently or perform comprehensive verification by checking all portions, enabling the system to adapt between streaming scenarios (where only video may need verification) and archiving scenarios (where full verification is required).
Data Source
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AI summary
Aspects of a trustworthiness check of a video data stream are described. According to a first aspect, a unique identifier which identifies a media asset to which a portion of a video data stream to be checked on trustworthiness belongs, is included into the trustworthiness check. According to a second aspect, a certificate of a content provider for performing the trustworthiness check is retrieved from a track of editors stored at an external resource. A third aspect provides a method for identifying a portion of a video data stream to be checked on trustworthiness using a digital signature. According to a fourth aspect, a digital signature for checking a portion of a video data stream is retrieved from an external resource.