{"schema":"record/v1","id":"art_01M5MDZQVJWG10EEDXCVHV82F4","type":"article","revision":1,"etag":"\"r1.s0\"","title":"Which WER variants and text normalisations change ASR subtitle scores, and is COMET usable for subtitle translation evaluation?","summary":"WER on connected speech is asymmetric and can exceed 1 (bound max(N1,N2)/N1), which motivated MER and WIL; Whisper's authors report text normalisation cutting WER by up to 50 percent on some sets and warn of overfitting to Whisper's style; SubER's authors found case-sensitive WER with punctuation did not consistently improve correlation with post-editing. IWSLT 2024 ranked offline speech translation by COMET but subtitling by SubER, with BLEU/chrF/BLEURT for translation and CPS/CPL/LPB compliance rates.","status":"active","body":{"text":"WER on connected speech is asymmetric and can exceed 1 (bound max(N1,N2)/N1), which motivated MER and WIL; Whisper's authors report text normalisation cutting WER by up to 50 percent on some sets and warn of overfitting to Whisper's style; SubER's authors found case-sensitive WER with punctuation did not consistently improve correlation with post-editing. IWSLT 2024 ranked offline speech translation by COMET but subtitling by SubER, with BLEU/chrF/BLEURT for translation and CPS/CPL/LPB compliance rates.\n\nCurator qualifications: Papers read 2026-10-22; no metric computed. Break-token WER row and COMET paper body not re-read beyond the abstract page.\n\nLimitations: Papers read 2026-10-22; no metric computed.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://arxiv.org/abs/2205.05805","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://github.com/apptek/SubER/blob/3395bfec76c8c9bbc220a6ee48c8566f16c99ac5/README.md","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://aclanthology.org/2024.iwslt-1.1.pdf","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://arxiv.org/abs/2009.09025","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://www.isca-archive.org/interspeech_2004/morris04_interspeech.pdf","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://arxiv.org/abs/2212.04356","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"}]},"categories":["T13","T20"],"tags":[],"language":"en","visibility":"public","moderation":{"state":"visible","reason":null},"evidence":{"inspection":"source_inspected","execution":"not_run","review":"unreviewed","review_revision":null,"claims":[{"url":"https://arxiv.org/abs/2205.05805","claim":"WER on connected speech is asymmetric and can exceed 1 (bound max(N1,N2)/N1), which motivated MER and WIL; Whisper's authors report text normalisation cutting WER by up to 50 percent on some sets and warn of overfitting to Whisper's style; SubER's authors found case-sensitive WER with punctuation did not consistently improve correlation with post-editing. 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IWSLT 2024 ranked offline speech translation by COMET but subtitling by SubER, with BLEU/chrF/BLEURT for translation and CPS/CPL/LPB compliance rates.\n\nCurator qualifications: Papers read 2026-10-22; no metric computed. Break-token WER row and COMET paper body not re-read beyond the abstract page.\n\nLimitations: Papers read 2026-10-22; no metric computed.\n\nEvidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.","citations":[{"url":"https://arxiv.org/abs/2205.05805","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://github.com/apptek/SubER/blob/3395bfec76c8c9bbc220a6ee48c8566f16c99ac5/README.md","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://aclanthology.org/2024.iwslt-1.1.pdf","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://arxiv.org/abs/2009.09025","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://www.isca-archive.org/interspeech_2004/morris04_interspeech.pdf","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"},{"url":"https://arxiv.org/abs/2212.04356","note":"Morris, Maier, Green, Interspeech 2004 PDF, abstract and eq. 2; Radford et al., Whisper (arXiv 2212.04356) PDF, text normalisation passage; Wilken et al., SubER (arXiv 2205.05805) PDF, Table 1 discussion; IWSLT 2024 Findings PDF, offline ST metrics and subtitling metrics"}]},"tags":[],"type":"article","links":[],"title":"Which WER variants and text normalisations change ASR subtitle scores, and is COMET usable for subtitle translation evaluation?","rights":[{"notes":"Applies to this original summary only, not to the cited sources.","hosting":"permitted","component":"documentation","license_id":null,"modification":"unknown","evidence_urls":[],"model_training":"unknown","redistribution":"permitted"}],"summary":"WER on connected speech is asymmetric and can exceed 1 (bound max(N1,N2)/N1), which motivated MER and WIL; Whisper's authors report text normalisation cutting WER by up to 50 percent on some sets and warn of overfitting to Whisper's style; SubER's authors found case-sensitive WER with punctuation did not consistently improve correlation with post-editing. 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