noun
Refers to a person who gives a formal talk, lecture, or speech at an event.
今日の講演者は有名な経済学者です。
Today's lecturer is a famous economist.
講演者は聴衆からの質問に丁寧に答えた。
The speaker answered questions from the audience politely.
話者 is a more general term for a speaker of a language or a person who is speaking, not necessarily in a formal lecture context.
Compound of 講演 (lecture, speech) and 者 (person).