A Meta-learning Based Generative Model with Graph Attention Network for Multi-Modal Recommender Systems
Pawan Agrawal, Subham Raj, Sriparna Saha, Naoyuki Onoe · Procedia Computer Science · 2023
With increased data in various e-commerce domains or in different online streaming platforms like Amazon Prime, Netflix, etc, it has become more challenging to give a personalized recommendation to a user. In terms of the movie recommendation system, different multimodal information such as audio, video, and text are effectively fused together to tackle this problem. However, in real-world scenarios this information may not always be present, leading to the problem of missing modality. Existing works in Recommender Systems (RSs) may fail to recommend effectively if their model is not susceptible to missing modality. In this work, we propose a meta-learning model to deal with the missing modality problem. Our proposed model tries to reconstruct the missing features with the help of the existing modalities and once reconstructed, we pass them to novel trident architecture for solving the recommendation task. We have performed experiments on the newly created multimodal version of the MovieLens dataset. Additionally, we have incorporated a new modality where we extracted subtitles of the movies to increase the effectiveness of our missing modality model.