ESSENTIAL: Episodic and Semantic Memory Integration for Video Class-Incremental Learning

• URL: http://arxiv.org/abs/2508.10896v1
• Date: Thu, 14 Aug 2025 17:59:07 GMT
• Title: ESSENTIAL: Episodic and Semantic Memory Integration for Video Class-Incremental Learning
• Authors: Jongseo Lee, Kyungho Bae, Kyle Min, Gyeong-Moon Park, Jinwoo Choi,
• Abstract summary: ESSENTIAL consists of episodic memory for storing temporally sparse features and semantic memory for storing general knowledge represented by learnable prompts.<n>We introduce a novel memory retrieval (MR) module that integrates episodic memory and semantic prompts through cross-attention.<n>Remarkably, with significantly reduced memory, ESSENTIAL achieves favorable performance on the benchmarks.
• Score: 8.958316945958025
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this work, we tackle the problem of video classincremental learning (VCIL). Many existing VCIL methods mitigate catastrophic forgetting by rehearsal training with a few temporally dense samples stored in episodic memory, which is memory-inefficient. Alternatively, some methods store temporally sparse samples, sacrificing essential temporal information and thereby resulting in inferior performance. To address this trade-off between memory-efficiency and performance, we propose EpiSodic and SEmaNTIc memory integrAtion for video class-incremental Learning (ESSENTIAL). ESSENTIAL consists of episodic memory for storing temporally sparse features and semantic memory for storing general knowledge represented by learnable prompts. We introduce a novel memory retrieval (MR) module that integrates episodic memory and semantic prompts through cross-attention, enabling the retrieval of temporally dense features from temporally sparse features. We rigorously validate ESSENTIAL on diverse datasets: UCF-101, HMDB51, and Something-Something-V2 from the TCD benchmark and UCF-101, ActivityNet, and Kinetics-400 from the vCLIMB benchmark. Remarkably, with significantly reduced memory, ESSENTIAL achieves favorable performance on the benchmarks.

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