Speaker Diarization Explained: How AI Knows Who Said What

Speaker diarization is the part of the pipeline that answers one simple question: who spoke when? If you work with meetings, interviews, podcasts, sales calls, or support recordings, that answer turns a messy wall of text into something you can actually use. Good transcription gives you words. Good diarization gives those words structure. Google Cloud Speech-to-Text describes diarization as assigning speaker tags to words, while Azure AI Speech notes that real-time sessions may briefly show an u