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Evaluating Automatic Subtitling: Correlating Post-editing Effort and Automatic Metrics

Alina Karakanta, Mauro Cettolo, Matteo Negri, Luisa Bentivogli


Abstract
Systems that automatically generate subtitles from video are gradually entering subtitling workflows, both for supporting subtitlers and for accessibility purposes. Even though robust metrics are essential for evaluating the quality of automatically-generated subtitles and for estimating potential productivity gains, there is limited research on whether existing metrics, some of which directly borrowed from machine translation (MT) evaluation, can fulfil such purposes. This paper investigates how well such MT metrics correlate with measures of post-editing (PE) effort in automatic subtitling. To this aim, we collect and publicly release a new corpus containing product-, process- and participant-based data from post-editing automatic subtitles in two language pairs (en→de,it). We find that different types of metrics correlate with different aspects of PE effort. Specifically, edit distance metrics have high correlation with technical and temporal effort, while neural metrics correlate well with PE speed.
Anthology ID:
2024.lrec-main.563
Volume:
Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024)
Month:
May
Year:
2024
Address:
Torino, Italia
Editors:
Nicoletta Calzolari, Min-Yen Kan, Veronique Hoste, Alessandro Lenci, Sakriani Sakti, Nianwen Xue
Venues:
LREC | COLING
SIG:
Publisher:
ELRA and ICCL
Note:
Pages:
6363–6369
Language:
URL:
https://aclanthology.org/2024.lrec-main.563
DOI:
Bibkey:
Cite (ACL):
Alina Karakanta, Mauro Cettolo, Matteo Negri, and Luisa Bentivogli. 2024. Evaluating Automatic Subtitling: Correlating Post-editing Effort and Automatic Metrics. In Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024), pages 6363–6369, Torino, Italia. ELRA and ICCL.
Cite (Informal):
Evaluating Automatic Subtitling: Correlating Post-editing Effort and Automatic Metrics (Karakanta et al., LREC-COLING 2024)
Copy Citation:
PDF:
https://aclanthology.org/2024.lrec-main.563.pdf