Decoder. plain-English AI glossary

Representation

● Core

How a model re-encodes something into its own internal language of numbers.

Think of it like

Sheet music for a song — not the sound itself, but a form the performer can actually work from.

Example

A photo of a cat becomes a representation — a stack of numbers — before the model can classify or caption it.

How it actually works

Deep learning’s whole trick is learning good representations: turning raw input into vectors where the useful structure is easy to read off. Better representations make downstream tasks easier. Much of what pretraining buys you is reusable representations.

For product teams

The quality of a model’s internal representations sets the ceiling on everything it can do downstream.

For engineers

A learned feature vector encoding input; the output of intermediate layers used by downstream heads.

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