用虚拟现实评测空间音频算法，还原真实听感。
VR-PTOLEMAIC: A Virtual Environment for the Perceptual Testing of Spatial Audio Algorithms
- 在虚拟教室中模拟25个听音位置，进行沉浸式音频评估。
- 采用MUSHRA标准，对比多种声场重建算法的还原效果。
- 适合音频算法开发与沉浸式音效质量测试人员使用。
空间音频算法的感知评估是发展沉浸式音频应用的重要环节，确保合成声场在听感、空间感知和听觉真实感方面达到质量标准。为支持此类评估，虚拟现实可提供沉浸且交互的测试环境。本文提出VR-PTOLEMAIC，一个用于评估空间音频算法的虚拟现实系统。该系统将MUSHRA（多刺激含隐藏参考与锚点）评估方法集成到虚拟环境中，用户可在虚拟复刻的研讨室中，于25个模拟听音位置，评估不同源信号卷积后的二阶混响声学响应。通过大规模测试，评估者对比了多种声场重建算法的性能。结果表明，该虚拟平台有效支持空间音频算法评估，用户普遍反馈体验良好且沉浸感强。
原文摘要 · Abstract (English)
The perceptual evaluation of spatial audio algorithms is an important step in the development of immersive audio applications, as it ensures that synthesized sound fields meet quality standards in terms of listening experience, spatial perception and auditory realism. To support these evaluations, virtual reality can offer a powerful platform by providing immersive and interactive testing environments. In this paper, we present VR-PTOLEMAIC, a virtual reality evaluation system designed for assessing spatial audio algorithms. The system implements the MUSHRA (MUlti-Stimulus test with Hidden Reference and Anchor) evaluation methodology into a virtual environment. In particular, users can position themselves in each of the 25 simulated listening positions of a virtually recreated seminar room and evaluate simulated acoustic responses with respect to the actually recorded second-order ambisonic room impulse responses, all convolved with various source signals. We evaluated the usability of the proposed framework through an extensive testing campaign in which assessors were asked to compare the reconstruction capabilities of various sound field reconstruction algorithms. Results show that the VR platform effectively supports the assessment of spatial audio algorithms, with generally positive feedback on user experience and immersivity.
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