Virtual-Space Stereoacoustic Processing With Simplified Structures
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Solution Overview
Problem
The reproduction of stereoacoustic sound in virtual environments, such as VR or AR, requires significant processing load, especially when changes occur in the position of sound sources or listeners, necessitating complex computations.
Innovation Solution
The method involves generating simplified structures in virtual spaces by replacing complex shapes with combinations of simple three-dimensional shapes, calculating reflection index values, and performing stereoacoustic processing using these simplified structures to reduce computational load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex structures in virtual space are used for accurate stereoacoustic reproduction, then sound reproduction accuracy is improved, but processing load increases significantly
Solution Approach 1:
The virtual space is divided into multiple regions with different levels of structural detail. Complex structures are segmented into important parts (near the listener) and less important parts (far from the listener), allowing selective processing that maintains accuracy where needed while reducing overall computational load.
Solution Approach 2:
Different regions of the virtual space are assigned different levels of processing quality. Areas closer to the listener receive higher processing quality with more detailed structural information, while distant areas use simplified representations, optimizing the balance between sound reproduction accuracy and processing load.
2Measurement precision
If real-time changes in sound source or listener position are processed with full computational detail, then stereoacoustic accuracy is maintained, but processing time increases
Solution Approach 1:
The processing level is made dynamic and adaptive based on the listener's position and movement. When the listener moves, only the affected regions are reprocessed at high detail, while other regions maintain their simplified representations, enabling real-time position changes without full computational overhead.
Solution Approach 2:
Instead of processing the entire virtual space at full computational detail for every position change, only the necessary portions (partial action) are processed with high detail. This selective processing maintains stereoacoustic accuracy for the listener's current viewpoint while significantly reducing processing time.
Data Source
AI summary
An information processing method includes: obtaining sound information that includes (i) a first audio signal and (ii) space information that is information for reproducing a virtual space and includes first data relating to a first structure disposed in the virtual space, the virtual space including the first structure and a sound source; generating second data based on the first data, each of the first data and the second data being associated with a position in the virtual space, the second data being data having a smaller amount of data than the first data; calculating a propagation distance of sound from the sound source, the sound being reflected at the position associated with the second data and arriving at a position of a listener; and generating a second audio signal subjected to stereoacoustic processing, using the first audio signal and the propagation distance.