VR Ambisonics Signal Rotation and MOA Extraction
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Solution Overview
Problem
The existing Mixed Order Ambisonics (MOA) technology in virtual reality (VR) audio lacks high spatial resolution accuracy and has excessive bandwidth occupancy.
Innovation Solution
The method involves determining an ambisonics signal rotation angle based on the equipment rotation angle of a VR audio terminal, rotating the ambisonics signal, and extracting a Mixed Order Ambisonics (MOA) signal to improve spatial resolution and reduce bandwidth occupancy, even when the terminal is not placed horizontally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Mixed Order Ambisonics (MOA) technology is used to reduce bandwidth occupancy, then bandwidth usage is reduced, but spatial resolution accuracy is compromised
Solution Approach 1:
The patent applies dynamics by making the ambisonics signal rotation angle variable based on equipment rotation angle. The system dynamically adjusts the rotation angle to track the terminal's orientation changes, ensuring that the high-order spatial resolution is always applied in the correct directional plane regardless of device orientation. This resolves the contradiction by maintaining spatial resolution accuracy through dynamic adaptation while preserving bandwidth efficiency.
Solution Approach 2:
The patent changes the parameter of rotation angle from fixed to variable, where the rotation angle is determined according to the equipment rotation angle. By adjusting the rotation angle parameter dynamically, the system maintains high spatial resolution in the horizontal direction (using higher orders) while keeping bandwidth occupancy low through selective order application in different directions, thus resolving the contradiction between spatial resolution and bandwidth usage.
2Measurement precision
If high-order ambisonics signals are transmitted in horizontal direction, then spatial resolution is improved, but bandwidth occupancy increases
Solution Approach 1:
The patent applies local quality by using different ambisonics orders in different directions - specifically, higher orders are applied in the horizontal direction where spatial resolution is most critical for user experience, while lower orders are used in the vertical direction. This localized application of quality resolves the contradiction by concentrating bandwidth resources where they provide maximum perceptual benefit while maintaining spatial resolution accuracy in the most important direction.
Solution Approach 2:
The system dynamically determines the rotation angle based on equipment rotation angle, allowing the high-order horizontal direction to rotate with the device. This ensures that spatial resolution is maintained in the user's line of sight direction while keeping bandwidth occupancy manageable through selective order application, resolving the contradiction between spatial resolution and bandwidth usage.
Data Source
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AI summary
A method for processing a virtual reality (VR) audio and a corresponding equipmentare provided. The method includes acquiring, by a transmitting terminal of a VR audio, an ambisonics signal rotation angle, wherein the ambisonics signal rotation angle is determined according to a first equipment rotation angle corresponding to a receiving terminal of the VR audio, rotating an ambisonics signal according to the acquired ambisonics signal rotation angle, and/or, acquiring, by the transmitting terminal of the VR audio, an order of a mixedorder ambisonics (MOA) signal determined according to related information of the VR audio, and extracting an MOA signal from the ambisonics signal according to the order of the MOA signal.Accordingly, an ambisonics signal rotation angle according to a rotation angle of an equipment is determined, the rotation occurs, and an MOA signal is extracted.