Audio Spatial Rendering Adjusting Virtual Positions
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Solution Overview
Problem
Existing audio signal processing technologies fail to effectively adapt spatial rendering to the local environment, leading to interference from background noise and other sounds, which affects the intelligibility of reproduced audio signals.
Innovation Solution
An audio spatial rendering apparatus and method that adjusts virtual spatial positions based on real spatial positions of sound sources, using parameters such as head-related transfer functions, inter-aural time and intensity differences, and direct-to-reverberation energy ratios, to minimize interference and enhance audio intelligibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spatial rendering is applied to improve audio intelligibility, then the reproduced sound quality is improved, but interference from local background noise and other sounds worsens the intelligibility
Solution Approach 1:
The patent applies local quality by making the spatial rendering adaptive to local environmental conditions. The system detects real sound sources in the local environment and adjusts the virtual spatial positions of rendered audio accordingly, so that the rendering quality is optimized for each specific location and environmental context rather than using a fixed rendering approach.
Solution Approach 2:
The patent implements dynamics by continuously adjusting the spatial rendering parameters based on detected real sound sources. The virtual spatial positions are dynamically modified in real-time according to the presence and position of local sound sources, allowing the system to adapt to changing environmental conditions and maintain optimal intelligibility.
2Device complexity
If virtual spatial positions are fixed for spatial rendering, then the rendering process is simple, but the reproduced sound is interfered by local interfering sounds
Solution Approach 1:
The patent transforms fixed spatial positions into dynamic adjustable positions. The system detects real sound sources and automatically adjusts virtual spatial positions in real-time, changing the rendering from a static process to a dynamic one that adapts to environmental conditions, thereby reducing interference from local sounds.
Solution Approach 2:
The patent implements feedback by detecting real sound sources in the environment and using this information to adjust the virtual spatial positions. The system continuously monitors the acoustic environment and modifies the rendering parameters based on this feedback, creating a closed-loop system that actively compensates for local interfering sounds.
3Object-affected harmful factors
If spatial rendering adapts to local environment by adjusting virtual positions, then interference from local sounds is reduced, but the rendering process becomes more complex
Solution Approach 1:
The patent applies self-service by enabling the spatial rendering system to automatically detect and adapt to its local environment without external intervention. The system independently identifies real sound sources and adjusts its own rendering parameters, making the complexity management self-contained rather than requiring complex external control mechanisms.
Data Source
AI summary
An audio spatial rendering apparatus and method are disclosed. In one embodiment, The audio spatial rendering apparatus includes a rendering unit for spatially rendering an audio stream so that the reproduced far-end sound is perceived by a listener as originating from at least one virtual spatial position, a real position obtaining unit for obtaining a real spatial position of a real sound source, a comparator for comparing the real spatial position with the at least one virtual spatial position; and an adjusting unit for, where the real spatial position is within a predetermined range around at least one virtual spatial position, or vice versa, adjusting the parameters of the rendering unit so that the at least one virtual spatial position is changed.