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20242026
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cs.CL2026

Benchmarking Speech-to-Speech Translation Models

Alkis Koudounas, Hayato Futami, Quentin Jodelet +3

Speech-to-speech translation (S2ST) has advanced rapidly, but offline evaluation lacks a unified protocol: studies report non-overlapping metric subsets, preventing direct comparis…

cs.CL2026

Optimizing Conversational Quality in Spoken Dialogue Systems with Reinforcement Learning from AI Feedback

Siddhant Arora, Jinchuan Tian, Jiatong Shi +4

Reinforcement learning from human or AI feedback (RLHF/RLAIF) for speech-in/speech-out dialogue systems (SDS) remains underexplored, with prior work largely limited to single seman…

cs.CL2025

Chain-of-Thought Reasoning in Streaming Full-Duplex End-to-End Spoken Dialogue Systems

Siddhant Arora, Jinchuan Tian, Hayato Futami +4

Most end-to-end (E2E) spoken dialogue systems (SDS) rely on voice activity detection (VAD) for turn-taking, but VAD fails to distinguish between pauses and turn completions. Duplex…

cs.CL2025

Task Arithmetic for Language Expansion in Speech Translation

Yao-Fei Cheng, Hayato Futami, Yosuke Kashiwagi +4

Recent progress in large language models (LLMs) has gained interest in speech-text multimodal foundation models, achieving strong performance on instruction-tuned speech translatio…

cs.CL2025

Scheduled Interleaved Speech-Text Training for Speech-to-Speech Translation with LLMs

Hayato Futami, Emiru Tsunoo, Yosuke Kashiwagi +4

Speech-to-speech translation (S2ST) has been advanced with large language models (LLMs), which are fine-tuned on discrete speech units. In such approaches, modality adaptation from…

cs.CL2025

Whale: Large-Scale multilingual ASR model with w2v-BERT and E-Branchformer with large speech data

Yosuke Kashiwagi, Hayato Futami, Emiru Tsunoo +1

This paper reports on the development of a large-scale speech recognition model, Whale. Similar to models such as Whisper and OWSM, Whale leverages both a large model size and a di…