Layered Video Processing for Safety Integrity Separation
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Solution Overview
Problem
The integration of disparate systems into fewer, more integrated systems poses challenges in maintaining separation of safety or security-related functions at differing levels of integrity, leading to increased costs and regulatory compliance issues.
Innovation Solution
A video processing system that assigns video data from multiple sources to hierarchical display layers based on safety/security levels defined in standards, allowing for the generation of output video that combines these layers while maintaining integrity levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If disparate systems are consolidated into fewer integrated systems, then size, weight, power and costs are reduced, but separation of safety or security related functions at differing levels of integrity becomes difficult to provide
Solution Approach 1:
The video processing system segments video data into multiple hierarchical layers, each corresponding to different safety or security integrity levels. This segmentation allows the integrated system to maintain functional consolidation while preserving the separation of safety-critical functions through distinct processing layers that can be independently managed and validated.
Solution Approach 2:
The patent introduces an intermediary video processing layer that acts as a mediator between integrated video sources and display outputs. This intermediary layer classifies and processes video data according to safety integrity levels, enabling the consolidated system to maintain proper separation of safety functions through a dedicated processing stage that enforces integrity requirements.
2Reliability
If whole systems are developed to the highest integrity level, then safety or security requirements are met, but development costs increase
Solution Approach 1:
The system applies local quality by assigning different integrity levels to different video data layers based on their specific safety or security requirements. Rather than developing the entire system to the highest integrity level, only the layers requiring high integrity are developed accordingly, while other layers can use standard development processes, thereby reducing overall development costs while meeting safety requirements where necessary.
3Device complexity
If the number of user displays is reduced to a minimum, then system size is reduced, but separation of differing display integrity levels becomes problematic
Solution Approach 1:
The patent resolves the display separation problem by introducing a new dimension - hierarchical video layers - rather than using multiple physical displays. Video data is organized into stacked layers corresponding to different integrity levels, with higher integrity layers displayed on top of lower integrity layers. This dimensional approach to data organization allows integrity separation to be maintained in the video signal domain while using a single physical display device.
Data Source
AI summary
A video processing system (100) comprises at least one controller (102) configured to receive a plurality of video data from a respective plurality of video data sources (106, 208). The system can assign one of a plurality of hierarchical display layers to each of the plurality of video data, and generate an output video for display, the output video comprising at least a portion of each of the plurality of video data layered according to the assigned hierarchical display layers. The plurality of hierarchical display layers is based on a respective plurality of safety/security levels defined in a safety/security standard.