German to English Marketing Journalism Press conference

The (Teilnahme von) in the term is just for additional context to distinguish this from the million other "Redakt.." questions. I only really need to make sure what is meant by this strange (to me) use of Redaktion.

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Vorgestellt wurde die Produktneuheit zu Beginn der Messe in Dresden am 4. September im Rahmen einer Pressekonferenz, mit Vertretern der nationalen und internationalen Presse. Einen Bericht der Pressekonferenz, wurde auf den Sendern ARTE und N24 ausgestrahlt. Das rege Interesse der Presse zeigte die Teilnahme von über 80 **Redaktionen** aus den verschiedenen Bereichen.
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Maybe I'm being deliberately thick here, but every reference I've checked puts 'Redaktion' as being the editors, the editing that they do and the place where they edit. It seems odd to me that the editors (as opposed to journalists) would attend a press conference. Would I therefore be correct in assuming this is something like a synonym for 'publications' (but possibly including TV and radio)?

TIA for helping make sense of this one!

Stephen