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When Tokens Talk Too Much: A Survey of Multimodal Long-Context Token Compression across Images, Videos, and Audios

Kele Shao, Keda Tao, Kejia Zhang, Sicheng Feng, Mu Cai, Yuzhang Shang, Haoxuan You, Can Qin, Yang Sui, Huan Wang

2025-07-28

When Tokens Talk Too Much: A Survey of Multimodal Long-Context Token
  Compression across Images, Videos, and Audios

Summary

This paper talks about different methods to reduce the number of tokens, or pieces of information, that multimodal large language models process when working with images, videos, and audio to make the models more efficient.

What's the problem?

Multimodal large language models handle a huge amount of data from images, videos, and audio, which makes them slow and uses a lot of computing power, limiting their practical use.

What's the solution?

The researchers categorized and reviewed various token compression techniques by what type of data they handle and how they work, helping to improve how models decide which parts of data are most important and can be kept or discarded.

Why it matters?

This matters because better token compression helps AI systems process complex multimodal data faster and more efficiently without losing important information, enabling smarter applications in areas like video analysis, speech recognition, and image understanding.

Abstract

A survey of token compression techniques for multimodal large language models, focusing on image, video, and audio data, categorizing methods by modality and mechanism.