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Leonardo Chiariglione: Running the Process That Made the Standards

By Infinite Creation · Profile

1943-

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At a Glance

Leonardo Chiariglione (born 1943) founded the Moving Picture Experts Group in 1988 with Hiroshi Yasuda and chaired it for over thirty years. MPEG produced MPEG-1, MPEG-2, MPEG-4, and with the ITU the H.264 and HEVC standards that carry essentially all digital video. Its method was competitive submission and objective evaluation rather than in-house invention.

Born 1943, Italy
Anchor year: 1988, MPEG founded
Strand: canon, as a process, not an invention

Career

The problem as it stood

By the late 1980s many organisations had video compression schemes and none interoperated. Without a common standard, digital video would have fragmented into incompatible islands, and no content could travel between them.

What he actually did

Chiariglione built a process: issue a call for proposals, evaluate submissions against objective and subjective criteria, and assemble a standard from the best-performing tools regardless of who submitted them. Competitors contributed to a shared result because the process was seen as fair.

How it worked

The design is institutional. Rival companies participate because a common standard grows the market more than a proprietary advantage would, and because the evaluation is credible. The output is a document specifying a decoder, leaving encoder design competitive, which is why encoders kept improving for decades within an unchanged standard.

What it made possible

Digital television, DVD, Blu-ray, digital broadcasting and streaming: MPEG-2 alone carried the world's digital television transition. The MP3 and AAC audio standards came from the same process.

What happened to him

He resigned in 2020 amid disputes over MPEG's restructuring within ISO and over patent licensing, which he argued had become dysfunctional enough to threaten adoption of newer standards.

Where the credit landed

Chiariglione is the rare figure who is credited *for* running a standards process, which is usually the very mechanism that erases people. His own criticism on leaving, that patent licensing had become unworkable, is a direct consequence of the same structure: a standard assembled from many parties' contributions accumulates patent claims from all of them. Standards-body authorship is its own erasure mechanism: MPEG, JPEG, ITU and ISO documents are the invention, so there is no inventor to credit.

Known For

MPEG specifies the decoder, leaving encoders competitive, which is why quality kept improving.
Competitors cooperate because a common standard grows the market.
He left in 2020 arguing patent licensing had become dysfunctional.

Knowledge Base

What You'll Learn

Convergence on a standard is an achievement, and it has to be organised.

Why standardising the decoder is the clever part

MPEG standards define what a compliant decoder must do, not how an encoder should work. Any encoder producing a conforming bitstream is legal, so manufacturers compete on encoding quality, speed and efficiency indefinitely. That is why an MPEG-2 or H.264 file encoded today looks far better than one encoded in 2005 at the same bitrate, with no change to the standard and full backward compatibility.

Where This Fits

MPEG standards set how compressed media travels, the transmission link set out in A History of Broadcast Technology.

FAQ

Q: What is MPEG?
A: The Moving Picture Experts Group, founded in 1988, which produced the MPEG-1, MPEG-2, MPEG-4, H.264 and HEVC standards through a process of competitive proposal and objective evaluation rather than in-house invention.

Q: Why do MPEG standards only define the decoder?
A: So that encoder design stays competitive. Any encoder producing a conforming bitstream is valid, which lets encoding quality improve for decades without changing the standard or breaking compatibility.

Vocabulary

Standards body. An organisation coordinating agreement on a common technical specification between parties who compete commercially. Its value lies in producing something everybody implements, which no single company can achieve alone however good its technology is.

Interoperability. The property of a format working across equipment from different manufacturers. The reason standards exist, and the thing that turns a technology into a market rather than a set of incompatible products.

Competitive submission. A process where multiple proposals are tested against common criteria and the best parts combined. Produces a stronger result than adopting any single contribution, at the cost of a slower process.

Codec generation. A family of compression standards released together and superseded as a group. Each generation roughly halves the data needed for the same quality, at the cost of more processing to decode.

Sources

The paper was checked against its publication record. Checked 20 August 2026.

L. Chiariglione, Impact of MPEG Standards on Multimedia Industry. Proceedings of the IEEE, volume 86, issue 6, pages 1222 to 1227, June 1998. Chiariglione's own account as convenor, sole author, written ten years into the work described above.