Automotive Camera View Verification for Frozen Frame Alerts

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Solution Overview

Problem

Conventional approaches for detecting duplicate frames in automotive camera views incur significant latency and resource overhead, leading to synchronization issues and delayed notification of stale or misleading image data.

Innovation Solution

The proposed solution involves computing checksums for portions of frames captured by cameras and comparing them with a sequence of previous checksums to detect frozen or repeated frames, with customizable settings for different regions and processing rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If software-based verification of checksums is used to detect duplicate frames, then detection capability is provided, but significant latency and resource overhead occur

Engineering Contradiction:

Improveduplicate frame detection capabilityVSAvoiddetection latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces software-based checksum verification with a hardware-based display pipeline checker that operates in parallel with the display pipeline. This hardware implementation computes and compares checksums without requiring software intervention, thereby eliminating the latency and resource overhead associated with software processing while maintaining duplicate frame detection capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The display pipeline checker computes checksums for current and previous frames in advance, before display occurs, and continuously compares them in real-time. This preliminary computation and continuous comparison enable timely detection of duplicate frames without interrupting the normal display flow, reducing detection latency.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If software-based checksum verification is implemented, then duplicate frames can be detected, but resource overhead increases

Engineering Contradiction:

Improveduplicate frame detection capabilityVSAvoidcomputational resource overhead

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent substitutes software-based computational verification with a dedicated hardware display pipeline checker that performs checksum computation and comparison operations in parallel with the display pipeline. This hardware implementation offloads the computational burden from the main processor, reducing CPU usage and energy consumption while maintaining detection reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system creates a parallel copy of the display pipeline's frame data flow that routes through the hardware checker. This copy allows the checker to independently compute and compare checksums without interfering with the main processing stream, distributing computational work efficiently and reducing overall resource overhead.

Inventive Principle:

Principle #26Copying

3Reliability

If complex communication between guest virtual machine and host virtual machine is used for checksum verification, then verification can be performed, but synchronization issues occur

Engineering Contradiction:

Improvechecksum verification capabilityVSAvoidsynchronization stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent extracts the checksum verification function from the software virtual machine communication layer and implements it as a standalone hardware display pipeline checker. This extraction eliminates the need for complex inter-vm communication protocols and synchronization mechanisms, as the hardware checker operates independently and directly interfaces with the display pipeline, thereby resolving synchronization issues.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The hardware display pipeline checker acts as an intermediary component between the display pipeline and the verification logic. It receives frame data directly from the display pipeline, performs checksum computation and comparison, and generates alerts independently, without requiring communication through the virtual machine layer. This intermediary role stabilizes the system by creating a dedicated verification path that does not depend on software synchronization.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250125909A1End-to-end camera view verification for automotive systems and applications

Publication Date: 2025.04.17 NVIDIA CORP

AI summary

In various examples, a technique for end-to-end camera view verification for automotive systems and applications includes computing a checksum for at least a portion of a frame to be displayed on a screen, wherein the frame comprises one or more views captured using one or more cameras. The technique also includes receiving a sequence of checksums associated with one or more previous frames displayed on the screen. The technique further includes updating one or more counters based on one or more comparisons of the computed checksum and the sequence of checksums and causing an alert associated with display of the frame on the screen to be generated based on the one or more counters.