@inproceedings{teixeira-etal-2026-falar,
    title = "{F}al{AR}: A Large-scale Speaker-Annotated {E}uropean {P}ortuguese Speech Corpus of Parliamentary Sessions",
    author = "Teixeira, Francisco  and
      Carvalho, Carlos  and
      Juli{\~a}o, Mariana  and
      Botelho, Catarina  and
      Solera-Ure{\~n}a, Rub{\'e}n  and
      Paulo, S{\'e}rgio  and
      Rolland, Thomas  and
      Peters, Ben  and
      Trancoso, Isabel  and
      Abad, Alberto",
    editor = "Piperidis, Stelios  and
      Bel, N{\'u}ria  and
      van den Heuvel, Henk  and
      Ide, Nancy  and
      Krek, Simon  and
      Toral, Antonio",
    booktitle = "Proceedings of the Fifteenth Language Resources and Evaluation Conference",
    month = may,
    year = "2026",
    address = "Palma de Mallorca, Spain",
    publisher = "ELRA Language Resource Association",
    url = "https://preview.aclanthology.org/ingest-lrec/2026.lrec-1.435/",
    doi = "10.63317/2xhv97bm5dyd",
    pages = "5566--5577",
    abstract = "State-of-the-art performance for Automatic Speech Recognition (ASR) largely depends on the availability of large-scale labeled corpora. This creates a demand for increased data collection efforts, particularly for under-represented languages and dialectal varieties. Due to having considerably fewer speakers (around 11 million), European Portuguese (EP) is overshadowed by Brazilian Portuguese (BP) (around 200 million speakers) in currently available large-scale speech data resources, resulting in under-performing speech-based systems for EP users. To address this gap, and following similar data collection efforts for other languages, we present FalAR, a large-scale, speaker-annotated speech corpus of European Portuguese parliamentary sessions. Spanning approximately 20 years, FalAR comprises 5,800 hours of speech data. In addition, 4,850 hours have speaker identity annotations, for a total of 1,180 speakers with associated metadata including age, gender, political affiliation, and parliamentary role. The corpus was built using a state-of-the-art EP CAM{\~O}ES ASR model for transcription-reference alignment. In this paper, we describe the data collection process, together with the main characteristics of the FalAR corpus. Furthermore, we evaluate the trade-off between data quantity and alignment accuracy on ASR performance, with our experiments demonstrating that incorporating FalAR as pre-training data yields up to 14{\%} relative WER improvement over baseline models."
}