A^2RD: Agentic Autoregressive Diffusion for Long Video Consistency

Hugging Face Daily Papers Papers

Summary

A^2RD is a new paper introducing an Agentic Autoregressive Diffusion architecture for long video synthesis, achieving improved consistency and narrative coherence through a closed-loop self-improvement process.

Synthesizing consistent and coherent long video remains a fundamental challenge. Existing methods suffer from semantic drift and narrative collapse over long horizons. We present A^2RD, an Agentic Auto-Regressive Diffusion architecture that decouples creative synthesis from consistency enforcement. A^2RD formulates long video synthesis as a closed-loop process that synthesizes and self-improves video segment-by-segment through a Retrieve--Synthesize--Refine--Update cycle. It comprises three core components: (i) Multimodal Video Memory that tracks video progression across modalities; (ii) Adaptive Segment Generation that switches among generation modes for natural progression and visual consistency; and (iii) Hierarchical Test-Time Self-Improvement that self-improves each segment at frame and video levels to prevent error propagation. We further introduce LVBench-C, a challenging benchmark with non-linear entity and environment transitions to stress-test long-horizon consistency. Across public and LVBench-C benchmarks spanning one- to ten-minute videos, A^2RD outperforms state-of-the-art baselines by up to 30% in consistency and 20% in narrative coherence. Human evaluations corroborate these gains while also highlighting notable improvements in motion and transition smoothness.
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Paper page - A^2RD: Agentic Autoregressive Diffusion for Long Video Consistency

Source: https://huggingface.co/papers/2605.06924

Abstract

A^2RD, an Agentic Auto-Regressive Diffusion architecture, addresses long video synthesis challenges through a closed-loop process with memory tracking, adaptive generation, and hierarchical self-improvement mechanisms.

Synthesizing consistent and coherent long video remains a fundamental challenge. Existing methods suffer fromsemantic driftandnarrative collapseover long horizons. We present A^2RD, anAgentic Auto-Regressive Diffusionarchitecture that decouples creative synthesis from consistency enforcement. A^2RD formulates longvideo synthesisas aclosed-loop processthat synthesizes and self-improves video segment-by-segment through a Retrieve--Synthesize--Refine--Update cycle. It comprises three core components: (i)Multimodal Video Memorythat tracks video progression across modalities; (ii)Adaptive Segment Generationthat switches among generation modes for natural progression and visual consistency; and (iii)Hierarchical Test-Time Self-Improvementthat self-improves each segment at frame and video levels to prevent error propagation. We further introduce LVBench-C, a challenging benchmark with non-linear entity and environment transitions to stress-testlong-horizon consistency. Across public and LVBench-C benchmarks spanning one- to ten-minute videos, A^2RD outperforms state-of-the-art baselines by up to 30% in consistency and 20% in narrative coherence. Human evaluations corroborate these gains while also highlighting notable improvements in motion and transition smoothness.

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