How the Discrete Cosine Transform Powers JPEG
Computerphile · Explainer · YouTube title: JPEG DCT, Discrete Cosine Transform (JPEG Pt2)- Computerphile
Why it's here
HN recommends it as an easy, clear intro to the DCT that finally made it click for several commenters.
What it covers
Mike Pound explains the discrete cosine transform and how it underpins JPEG compression. It is part two of Computerphile's JPEG series.