Hui Ren

The work introduces Grounded Entity Biographies (GEB), a long-video memory framework that groups visually grounded observations of the same physical instance across clips into retrievable biographies and retrieves a biography alongside episodic evidence at question time; across four benchmarks including day-long and week-long recordings it improves both multiple-choice and open-ended question answering over prior memory frameworks, reaching 72.0% accuracy on EgoLifeQA, 4.4 percentage points above the best published result, with ablations showing that grounded identity association and biography reading each contribute and that additional descriptions alone do not fully recover the gains.

The work introduces Grounded Entity Biographies (GEB), a long-video memory framework that groups visually grounded observations of the same physical instance across clips into retrievable biographies and retrieves a biography alongside episodic evidence at question time; across four benchmarks including day-long and week-long recordings it improves both multiple-choice and open-ended question answering over prior memory frameworks, reaching 72.0% accuracy on EgoLifeQA, 4.4 percentage points above the best published result, with ablations showing that grounded identity association and biography reading each contribute and that additional descriptions alone do not fully recover the gains.