AI-900Domain 4: Describe Features of Natural Language Processing Workloads on AzureNLP & SpeecheasySingle choice
Which Azure AI Speech capability converts spoken audio into text (e.g., meeting transcription)?
A.Text-to-speech (speech synthesis)
The reverse direction — audio out, not text out.
B.Speech-to-text (speech recognition)
Audio → text = speech-to-text. Correct.
C.Speaker recognition
Speaker recognition identifies voices, doesn't transcribe.
D.Speech translation
Translation changes language — transcription alone is speech-to-text.
Why this answer
Speech-to-text = audio → transcript (recognition). Text-to-speech = text → synthesized audio. Speaker recognition identifies WHO is speaking. Speech translation does both transcription and translation in one flow.
Correct answer: B · Last reviewed 2026-02-14
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