Escaping the BLEU Trap: A Signal-Grounded Framework with Decoupled Semantic Guidance for EEG-to-Text Decoding

Researchers propose SemKey, a novel framework that addresses key limitations in EEG-to-text decoding by preventing hallucinations and improving semantic fidelity through decoupled guidance objectives. The system redesigns neural encoder-LLM interaction and introduces new evaluation metrics beyond BLEU scores to achieve state-of-the-art performance in brain-computer interfaces.