Yeah I had that same confusion initially.<p>I guess they differentiate it as follows:<p>- It&#x27;s the full photo data (12 MP) for each frame
- It captures 1.5 seconds <i>before</i> and after you press the capture button
- (Speculation based on a dot-point in the keynote) It&#x27;s stored using some frame-to-frame compression thing, probably similar to a movie but with the option to recover any individual frame as a full size, full quality image<p>I reckon much of their photo technology comes from their acquisition of the SnappyCam app and that developer&#x27;s custom JPEG encoding.