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omni-modality video caption dataset

An omni-modality video caption dataset is a curated collection of video clips paired with comprehensive textual descriptions that synthesize information across all primary video tracks, including visual imagery, audio signals, and linguistic elements such as subtitles or spoken dialogue. Unlike conventional video-text datasets that focus predominantly on describing visible actions and objects, an omni-modality dataset unifies visual scenes with acoustic events, environmental sounds, and speech transcripts into integrated, holistic annotations. These datasets serve as foundational resources for training and evaluating multimodal artificial intelligence models, enabling cross-modal understanding, retrieval, question answering, and caption generation across vision, audio, and text.

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VAST: A Vision-Audio-Subtitle-Text Omni-Modality Foundation Model and Dataset

VAST: A Vision-Audio-Subtitle-Text Omni-Modality Foundation Model and Dataset

Sihan Chen, Handong Li, Qunbo Wang, Zijia Zhao, Mingzhen Sun, Xinxin Zhu, Jing Liu

OrganizationsInstitute of Automation, Chinese Academy of SciencesUniversity of Chinese Academy of Sciences

Why you should read this

Presents VAST-27M, an automatically generated 27-million-clip omni-modality video caption dataset, along with a unified foundation model capable of processing vision, audio, subtitles, and text across diverse retrieval, captioning, and question-answering tasks.

Vision and text have been fully explored in contemporary video-text foudational models, while other modalities such as audio and subtitles in videos have not received sufficient attention. In this paper, we resort to establish connections between multi-modality video tracks, including Vision, Audio, and Subtitle, and Text by exploring an automatically generated large-scale omni-modality video caption dataset called VAST-27M. Specifically, we first collect 27 million open-domain video clips and separately train a vision and an audio captioner to generate vision and audio captions. Then, we employ an off-the-shelf Large Language Model (LLM) to integrate the generated captions, together with subtitles and instructional prompts into omni-modality captions. Based on the proposed VAST-27M dataset, we train an omni-modality video-text foundational model named VAST, which can perceive and process vision, audio, and subtitle modalities from video, and better support various tasks including vision-text, audio-text, and multi-modal video-text tasks (retrieval, captioning and QA). Extensive experiments have been conducted to demonstrate the effectiveness of our proposed VAST-27M corpus and VAST foundation model. VAST achieves 22 new state-of-the-art results on various cross-modality benchmarks. Code, model and dataset will be released at https://github.com/TXH-mercury/VAST.

Added

2026-09-26