Communication Dans Un Congrès Année : 2026

ROBUST ACCENT IDENTIFICATION VIA VOICE CONVERSION AND NON-TIMBRAL EMBEDDINGS

Rayane Bakari
  • Fonction : Auteur
  • PersonId : 1662413
Olivier Le Blouch
  • Fonction : Auteur
  • PersonId : 1662414
Nicolas Gengembre
  • Fonction : Auteur
  • PersonId : 1662415
Nicholas Evans

Résumé

Automatic accent identification (AID) remains a challenging task due to the complex variability of accents, the entanglement of accent cues with speaker traits, and the scarcity of reliable accentlabelled data. To address these challenges, we propose a speaker augmentation strategy using voice conversion (VC), with which we generate additional training data by converting original training utterances into different speaker voices while preserving accentual cues. For this purpose, we select two recent VC systems and evaluate their capability to preserve accent. Alternatively, we also explore the use of non-timbral embeddings in AID, for their ability to convey accent information among other non timbral cues. The effectiveness of both methods is demonstrated on the GenAID benchmark, achieving a new state-of-the-art F1-score of 0.66, compared to the previous score of 0.55. Beyond AID, we show that non-timbral embeddings enable accent-controlled Text-to-Speech, producing high-fidelity speech with accurate accent transfer.

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Dates et versions

hal-05603935 , version 1 (27-04-2026)

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Rayane Bakari, Olivier Le Blouch, Nicolas Gengembre, Nicholas Evans. ROBUST ACCENT IDENTIFICATION VIA VOICE CONVERSION AND NON-TIMBRAL EMBEDDINGS. ICASSP, May 2026, Barcelone, Spain. ⟨hal-05603935⟩

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