Echo-Infinity: Real-Time Infinite Video Generation via Learnable Memory Query

Echo-Infinity presents an autoregressive video generation framework with a learnable Memory Query mechanism that dynamically compresses frame history via attention, maintaining constant compute cost regardless of sequence length. The approach achieves real-time generation of 24-hour (over 1.3M frame) video rollouts for the first time, and introduces Unified Relative RoPE to eliminate positional embedding extrapolation gaps.