In-Vehicle Wireless Video Time Correction for Stale Content Detection

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Solution Overview

Problem

Accurately calculating frame-level latency in wireless camera streams for in-vehicle video is challenging without manufacturer support, leading to potential video stream playback failures.

Innovation Solution

A method for video streaming that includes identifying a stable video region, detecting stale content, and providing a notification to vehicle occupants using timestamp reconstruction and threshold-based keyframe arrival time analysis to ensure accurate latency detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If frame-level latency calculation is performed without camera manufacturer support, then system independence is improved, but measurement precision deteriorates

Engineering Contradiction:

Improvesystem independenceVSAvoidframe-level latency accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent introduces an intermediary mechanism using stable video region detection and keyframe timestamp analysis as a mediator between the wireless camera stream and the latency measurement process. This intermediary layer enables independent latency calculation by creating a reference framework that doesn't require manufacturer support while maintaining measurement accuracy through multiple verification methods including timestamp reconstruction and traffic amount comparison

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If stale video content is not detected, then system complexity is reduced, but reliability deteriorates

Engineering Contradiction:

Improvesystem complexityVSAvoidvideo stream integrity

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system implements self-service by enabling the video processing system to automatically detect and identify its own stale content through internal analysis of keyframe timestamps and video region stability. The notification mechanism serves the system itself by providing feedback about stream quality without requiring external monitoring, thereby maintaining reliability while keeping the system relatively simple

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements feedback through the notification mechanism that provides information about stale video content to the system operator. This feedback loop enables the system to respond to detected issues by alerting users to potential problems with video stream freshness, thereby maintaining reliability through continuous monitoring and information provision

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12380702B2Method and system for video stream time correction and latency detection

Publication Date: 2025.08.05 GM GLOBAL TECHNOLOGY OPERATIONS LLC

AI summary

A method for video streaming includes receiving video streaming data from a wireless camera. The camera is in wireless communication with a vehicle. The method further includes identifying a stable video region in the video streaming data received from the wireless camera, detecting stale video content in the video streaming data based on the stable video region, and in response to detecting the stale video content in the video streaming data, providing a notification to a vehicle occupant, via a display of the vehicle. The notification is indicative that a video streamed in the display of the vehicle is stale. The method described in this paragraph improves video and vehicle technology by identifying stale video content and notifying the vehicle occupant that the video is stale, thereby preventing the vehicle occupant from relying on stale video content.