Speech Recovery for Real-World Self-powered Intermittent Devices
This addresses speech degradation in battery-free wearable/IoT devices, offering a novel solution for real-world applications.
The paper tackles the problem of incomplete speech inputs from self-powered intermittent devices by proposing an intermittent speech recovery system, which improves speech quality by up to 591.7%, intelligibility by up to 80.5%, and reduces word error rate by up to 52.6%.
The incompleteness of speech inputs severely degrades the performance of all the related speech signal processing applications. Although many researches have been proposed to address this issue, they controlled the data missing conditions by simulation with self-defined masking lengths or sizes. Besides, the masking definitions are different among all these experimental settings. This paper presents a novel intermittent speech recovery (ISR) system for real-world self-powered intermittent devices. Three contributive stages: interpolation, enhancement, and combination are applied to the ISR system for speech reconstruction. The experimental results show that our recovery system increases speech quality by up to 591.7%, while increasing speech intelligibility by up to 80.5%. Most importantly, the proposed ISR system improves the WER scores by up to 52.6%. The promising results not only confirm the effectiveness of the reconstruction but also encourage the utilization of these battery-free wearable/IoT devices.