{"slug": "hierarchical-gru-with-input-conditioned-slot-queries-for-ball-action", "title": "Hierarchical GRU with Input-Conditioned Slot Queries for Ball Action Anticipation", "summary": "Researchers introduced a hierarchical model for ball action anticipation in football broadcast video, achieving 17.91% mAP on the SoccerNet benchmark. The system uses a GRU and Transformer decoder with input-conditioned slot queries to predict actions from a 30-second observation window.", "body_md": "arXiv:2606.14730v1 Announce Type: new\nAbstract: We present a hierarchical model for ball action anticipation in football broadcast video. Given a 30-second observation window, the system predicts actions occurring in the subsequent 5-second window across 10 classes. A shared local Transformer encodes clip-level features within each 5-second sub-window; a GRU then aggregates temporal context across all sub-windows; finally, a Transformer decoder with K input-conditioned event slots decodes the anticipation target via three decoupled heads (objectness, class, temporal offset). We introduce frequency-reweighted Hungarian matching that systematically favours rare action classes, and Gaussian soft targets for temporal bin supervision. On the SoccerNet Ball Action Anticipation benchmark, our method achieves 17.91% mAP on the test server.", "url": "https://wpnews.pro/news/hierarchical-gru-with-input-conditioned-slot-queries-for-ball-action", "canonical_source": "https://arxiv.org/abs/2606.14730", "published_at": "2026-06-16 04:00:00+00:00", "updated_at": "2026-06-16 04:18:49.950433+00:00", "lang": "en", "topics": ["machine-learning", "computer-vision", "neural-networks"], "entities": ["SoccerNet", "GRU", "Transformer"], "alternates": {"html": "https://wpnews.pro/news/hierarchical-gru-with-input-conditioned-slot-queries-for-ball-action", "markdown": "https://wpnews.pro/news/hierarchical-gru-with-input-conditioned-slot-queries-for-ball-action.md", "text": "https://wpnews.pro/news/hierarchical-gru-with-input-conditioned-slot-queries-for-ball-action.txt", "jsonld": "https://wpnews.pro/news/hierarchical-gru-with-input-conditioned-slot-queries-for-ball-action.jsonld"}}