开源MATLAB工具箱实现STI语音传输指数计算，支持标准方法与实测验证。
A MATLAB toolbox for Computation of Speech Transmission Index (STI)
- 基于IEC 60268-16:2020标准，实现直接与间接计算STI的方法。
- 在参考信号测试中满足标准要求，实测结果与商用设备一致。
- 提供开源代码，适用于语音质量评估与声学系统测试的研究者。
语音传输指数（STI）是预测语音通过传输信道后可懂度的常用简化指标。根据国际电工委员会标准IEC 60268-16:2020，本文描述了从声学测量中计算STI的方法。尽管如此，可靠的STI实现方案并未公开，且常受限于专有测量硬件。本文提出一个基于MATLAB的STI实现，涵盖标准规定的直接与间接方法，包括缩短版STIPA协议。该实现经参考信号测试验证，符合规定要求；此外，还与商用测量设备进行了对比验证。本软件提供开源代码，便于学术与工程应用。
原文摘要 · Abstract (English)
The speech transmission index (STI) is a popular simple metric for the prediction of speech intelligibility when speech is passed through a transmission channel. Computation of STI from acoustic measurements is described in the IEC 60268-16:2020 standard. Though, reliable implementations of STI are not publicly accessible and are frequently limited to the use with a proprietary measurement hardware. We present a Matlab STI implementation of both the direct and indirect approaches according to the standard, including the shortened STIPA protocol. The suggested implementation meets prescribed requirements, as evidenced by tests on reference signals. Additionally, we conducted a verification measurement in comparison to a commercial measurement device. Our software comes with open source code.
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