Predictive Coding (Rao & Ballard 1999):
Each level generates predictions
of lower level activity.
Prediction errors propagate up.
Free energy F = E_q[log q - log p]
≈ complexity + accuracy
Current belief µ:
—
Free energy:
—
Pred. error ε:
—
Precision = inverse variance.
High precision = trust
sensory data more.
Each level generates predictions
of lower level activity.
Prediction errors propagate up.
Free energy F = E_q[log q - log p]
≈ complexity + accuracy
Current belief µ:
—
Free energy:
—
Pred. error ε:
—
Precision = inverse variance.
High precision = trust
sensory data more.