HMD Audio-Visual Coordinate Alignment Correction
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Solution Overview
Problem
In systems using head-mounted displays (HMDs) for free viewpoint video, there is a mismatch between the coordinate axes of the image space and the acoustic space due to accumulated errors, leading to an unnatural sensation for the viewer.
Innovation Solution
A control apparatus with a displacement detection unit to identify the mismatch between the image space and acoustic space coordinate axes and a correction unit to adjust the image space coordinates to match the acoustic space, ensuring a realistic sensation by correcting the displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a head-mounted display (HMD) with motion detection is used for free viewpoint video, then the viewer can select and view desired areas in the video, but the coordinate axes of image space and acoustic space become displaced due to accumulated error
Solution Approach 1:
The system detects the displacement between image space coordinate axes and acoustic space coordinate axes, then feeds back correction information to adjust the audio output. This closed-loop feedback mechanism compensates for the accumulated errors that occur during prolonged HMD usage, maintaining alignment between visual and auditory spatial references.
Solution Approach 2:
The system dynamically changes the parameters of audio output by detecting coordinate axis displacement and adjusting audio positioning accordingly. When displacement is detected, the system modifies the spatial parameters of audio reproduction to realign with the image space, thereby correcting the mismatch without requiring physical repositioning of components.
2Reliability
If coordinate axes of image space and acoustic space are kept aligned, then a realistic sensation is maintained, but the system complexity increases due to continuous detection and correction mechanisms
Solution Approach 1:
The control apparatus performs multiple functions using a unified system: it manages free viewpoint video display, detects coordinate axis displacement between image and acoustic spaces, and executes correction of audio positioning. This multi-functional approach maintains realistic sensation while avoiding the need for separate dedicated detection and correction subsystems.
Data Source
AI summary
A control apparatus includes: a displacement detection unit adapted to detect, based on a result of acquiring audio outputted from an output apparatus, the result of acquiring being acquired in a display apparatus that displays an image in accordance with motion, and the image that the display apparatus displays, displacement between coordinate axes of an image space according to the image that the display apparatus displays and coordinate axes of an acoustic space according to audio outputted by the output apparatus; and a correction unit adapted to correct the displacement of the coordinate axes detected by the displacement detection unit.