Scaling Conversational Hungarian ASR: The BEA-Dialogue+ Corpus

• URL: http://arxiv.org/abs/2605.31469v1
• Date: Fri, 29 May 2026 16:01:25 GMT
• Title: Scaling Conversational Hungarian ASR: The BEA-Dialogue+ Corpus
• Abstract summary: We introduce BEA-Dialogue+, an expanded version of the BEA-Dialogue corpus that relaxes the split criterion for experimenters and dialogue partners.<n>This results in 200 hours of transcribed natural conversations.<n>We evaluate several Whisper- and FastConformer-based models on both corpus versions.
• Score: 1.3432835891025114
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Conversational automatic speech recognition in Hungarian is constrained by the limited amount of publicly available dialogue-style training data. The BEA-Dialogue corpus addresses this need, but its strictly speaker-disjoint train/dev/eval split reduces the usable material to only 85 hours. In this paper, we introduce BEA-Dialogue+, an expanded version of the corpus that relaxes the split criterion for experimenters and dialogue partners while preserving complete separation of the primary speakers. This results in 200 hours of transcribed natural conversations and enables a controlled study of the trade-off between additional training data and speaker overlap across the splits. We evaluate several Whisper- and FastConformer-based models on both corpus versions, including Serialized Output Training (SOT)-based fine-tuning for dialogue transcription. Our results show that the larger corpus is more challenging for models without fine-tuning, whereas SOT-based adaptation yields consistent improvements in WER, CER, cpWER, and cpCER. Overall, BEA-Dialogue+ provides a substantially larger yet still demanding benchmark for Hungarian dialogue ASR, and a practical resource for training and evaluating dialogue transcription systems.

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