Does Whisper understand Swiss German? An automatic, qualitative, and human evaluation

• URL: http://arxiv.org/abs/2404.19310v2
• Date: Thu, 9 May 2024 11:54:04 GMT
• Title: Does Whisper understand Swiss German? An automatic, qualitative, and human evaluation
• Authors: Eyal Liron Dolev, Clemens Fidel Lutz, Noëmi Aepli,
• Abstract summary: Whisper is a state-of-the-art automatic speech recognition (ASR) model. We evaluate Whisper's performance on Swiss German using automatic, qualitative, and human evaluation.
• Score: 2.7036595757881323
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Whisper is a state-of-the-art automatic speech recognition (ASR) model (Radford et al., 2022). Although Swiss German dialects are allegedly not part of Whisper's training data, preliminary experiments showed that Whisper can transcribe Swiss German quite well, with the output being a speech translation into Standard German. To gain a better understanding of Whisper's performance on Swiss German, we systematically evaluate it using automatic, qualitative, and human evaluation. We test its performance on three existing test sets: SwissDial (Dogan-Sch\"onberger et al., 2021), STT4SG-350 (Pl\"uss et al., 2023), and Swiss Parliaments Corpus (Pl\"uss et al., 2021). In addition, we create a new test set for this work, based on short mock clinical interviews. For automatic evaluation, we used word error rate (WER) and BLEU. In the qualitative analysis, we discuss Whisper's strengths and weaknesses and anylyze some output examples. For the human evaluation, we conducted a survey with 28 participants who were asked to evaluate Whisper's performance. All of our evaluations suggest that Whisper is a viable ASR system for Swiss German, so long as the Standard German output is desired.

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