# EPCC: Faster-than-Demonstration Planning with Slow Expert Demonstrations and Fast Play

- Source: arXiv cs.RO
- Published: 2026-10-27T04:00:00.000Z
- RoboHot: https://robohot.news/en/items/ufeb7hoqvzzus8yjaaa9ycsi8
- Original: https://arxiv.org/abs/2609.22798

## Summary

The authors propose Expert-Play Contouring Control (EPCC), which combines slow expert demonstrations with fast, non-expert play to achieve execution speeds faster than the demonstrations. Expert demonstrations train a latent trajectory generator whose predictions are reparameterized into a time-independent contour of task progress, while play data trains a world model of fast-action outcomes. At deployment, the planner optimizes actions along this contour and penalizes deviation from it.