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Glossary

Synthetic media

Definition — Any media (images, video, audio) generated or substantially modified by AI rather than captured from reality. Regulations such as the EU AI Act attach transparency obligations to synthetic media that depicts realistic people.

Synthetic media covers a spectrum: fully generated images and video, AI voice, and real footage substantially altered by AI. The common thread is that the media does not document reality — it was synthesized or reshaped by a model. AI influencer content sits at the fully-generated end of that spectrum.

Regulators care about one slice of it in particular: synthetic media that realistically depicts people, because that is where deception risk lives. The EU AI Act attaches transparency duties to it — disclosure to viewers and machine-readable marking of the output — and platforms mirror those duties in their own policies. The EU AI Act compliance guide covers what publishers of synthetic personas actually need to do.

The practical response emerging across the industry is provenance: attach signed metadata (Content Credentials) at creation, label the content at publication, and keep visible disclosure on the account. See how platform AI labels work for the current mechanics.

From theory to practice

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