Head-Mounted Display Video Synchronization for Low-Latency Remote Operation
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Solution Overview
Problem
Remote operation of machinery faces challenges due to latency issues, particularly in hazardous environments, where users lack the same viewing perspective as traditional work settings, leading to disorientation and increased risk of accidents.
Innovation Solution
The system employs a remote capture device and a head-mounted display that processes video on a graphics processing unit, synchronizing camera movements with head-mounted display movements using rotation matrices, interpolation, and extrapolation to minimize latency, allowing for real-time, immersive sensory information with reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If video is processed and transmitted in real-time for remote operation, then the user receives immersive sensory information, but latency is introduced causing disorientation and safety risks
Solution Approach 1:
The system performs preliminary actions by pre-calculating rotation matrices and synchronizing camera movements with head-mounted display movements before video processing. This allows the system to compensate for latency by predicting the user's head position and pre-adjusting the video feed accordingly, reducing the effective latency experienced by the user.
Solution Approach 2:
The system dynamically adjusts video processing parameters based on real-time head movement detection. By continuously monitoring head-mounted display movements and adjusting camera rotation and video rendering in real-time, the system adapts to changing user behavior patterns, optimizing the balance between immersive experience and latency reduction.
2Ease of operation
If video processing is performed to provide the same viewing perspective as traditional work, then user orientation is improved, but latency increases making precise controls difficult
Solution Approach 1:
The system extracts only the essential visual information needed for user orientation by directly mapping camera feed to head-mounted display perspective using rotation matrices. Instead of processing the entire video stream for full 360-degree immersion, the system selectively renders only the relevant portion of the scene that corresponds to the user's current head orientation, reducing processing latency while maintaining orientation accuracy.
3Adaptability or versatility
If camera movement is synchronized with head-mounted display movement, then immersive experience is enhanced, but system complexity increases
Solution Approach 1:
The system replaces complex mechanical synchronization mechanisms with computational methods. Instead of using mechanical linkages or complex control systems to physically synchronize camera movement with head-mounted display movement, the system uses rotation matrices and software-based coordinate transformations to achieve synchronization, significantly reducing hardware complexity while maintaining synchronization accuracy.
Data Source
AI summary
Media, systems, and methods for reducing latency in a head-mounted display for the remote operation of machinery. A remote camera sends raw video to a graphics processing unit which processes the video and transmits the updated video to a head-mounted display with limited latency such that the control of remote devices may be improved. The image may be spherically rendered and projected onto the head-mounted display with a rectangular view. The graphics processing unit may determine a rotation matrix based on a pose of the remote camera and a pose of the head-mounted display, and the image may be projected based on the rotation matrix.