AI Mathematics
How to Build AI Lipsync, Part 4: Training LSTMs, Their Limits, and the Leap to Transformers
1. Position Loss (L_position) - Accuracy of the Mouth Shape Time Mouth opening Truth Predicted L_position = Σᵢ wᵢ × ||y_pred - y_true||² Computes the difference between predicted and ground-truth values at each time step. Important parameters (jaw opening, mouth opening) receive larger weights. jaw_open: ×2.0