Author

Duc Tran

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#natural language process... Preprint Oct 2026

Not One Belief: Answer Payloads, Persistence, and Dissociated Confidence Signals in Conversational Question Answering

This work splits each follow-up into its speech act (re-ask, agree, or challenge) and its payload (an answer string, correct or not), and measures four confidence signals on the same transcripts: verbalized confidence, length-normalized likelihood, a frozen hidden-state probe, and P(True).

Duc Tran · 0 citations

Conference Aug 2026

Codebook refinement transformer: post-retrieval correction for neural codec voice conversion

We propose the Codebook Refinement Transformer (CRT), a non-autoregressive model that improves retrieval-based voice conversion on discrete neural audio codec tokens. CRT operates on the Mimi codec’s hierarchical residual vector quantized (RVQ) token space using a Conformer backbone with Feature-wise Linear Modulation...

Q. Nguyen, Duc Tran, D. Phan et al. · International Conference on... · 0 citations