调查语音压缩对失节性语音声学的影响
Kelvin Tran1, Lingfeng Xu1, Gabriela Stegmann2
1Arizona State University, USA.
Interspeech
|November 4, 2024
概括
远程实践中的语音压缩,就像Opus编解码器一样,可以扭曲失联症的声学测量. 这项研究揭示了哪些语音特征最容易受到带宽减少的影响,影响远程临床评估.
科学领域:
- 语音语言病理学 语言病理学
- 声学分析 声学分析
- 远程医疗远程医疗
背景情况:
- 远程诊疗越来越多地用于临床护理,需要进行远程语音评估.
- 远程实践平台通常使用语音压缩算法,如Opus编解码器,来管理带宽.
- 该Opus编解码器针对一般语音进行了优化,这引发了人们对Opus编解码器对于失节性语音的准确性方面的担忧.
研究的目的:
- 为了研究语音压缩算法的对失声症声学测量的影响.
- 为了确定是否远程传输的异关节性语音在不同的带宽条件下是原始信号的忠实表示.
主要方法:
- 使用了来自20名患有脱节性关节障碍的人的高保真音频录音.
- 使用Opus编解码器以三种不同的比特速率处理录音,以模拟不同的互联网带宽.
- 用混合效果模型提取和分析了发音,声音和表情的声学测量.
主要成果:
- 在Opus处理后,观察到塞普斯特拉峰突出,语音休息,动和元音空间区域的显著差异.
- 调和母音空间区域也被发现受到带宽条件的显著影响.
- 特定的声学测量被确定为易受语音压缩算法的影响.
结论:
- 像Opus这样的语音压缩算法可以改变失节性语音的关键声学特征.
- 由于带宽的限制,远程虚关节性语音评估的可靠性可能会受到损害.
- 了解这些变化对于精确的基于远程实践的语音语言病理学评估至关重要.
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