arXiv Computation and Language By Qiyong Zhong, Jiajie Su, Ming Yang, Li Zhang

JevRec: Linguistic Encoding with Jev-like Decision Modeling for LLM-based Generative Recommendation

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JevRec introduces a variable‑length linguistic encoding for items in generative recommendation, assigning shorter semantic identifiers (SIDs) to popular items and richer SIDs to long‑tail items. It separates length prediction and content generation into distinct heads while sharing the interaction‑history representation, mitigating gradient conflicts. Experiments on three public datasets demonstrate that JevRec surpasses baseline models in recommendation metrics and reduces training and inference time compared to TIGER.

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