expulp Verdict

Weekly ranking, Technology

H.264 is magic: a technical walkthrough of a remarkable technology.

Sid Bala, sidbala.com, Technology

81Original Thinker

A clear, well-illustrated explainer of textbook H.264 concepts, made vivid by one real-numbers worked example.

What it adds

An accessible explainer that grounds the standard H.264 pipeline in the author's own worked example, the Apple homepage video, with real file sizes and compression ratios.

Claim by claim

  • 7 the author's own
  • 2 an AI would say
  • 0 known elsewhere
  • 5 common knowledge

Its strongest original claims

  • A 5-second 60fps H.264 video of the Apple homepage was 175KB while a single PNG screenshot was 1015KB.
  • H.264 thus appears roughly 1500x as efficient as PNG in this case.
  • H.264 is a lossy codec while PNG is lossless.
  • Even at 2% of original information entropy, the difference is not noticeable without zooming.
  • H.264 splits frames into 16x16 macroblocks and uses I-frames, P-frames and B-frames with motion vectors for temporal compression.

Scored by Expulp Verdict for what the piece adds beyond what is already known and published. The full verdict shows every claim with its reasons. Leaderboard, what Verdict gets right and where it is weak.