What is the core function of Azure AI Speech?
Show answer and explanation
Answer: C
Azure AI Speech turns audio into text through speech recognition and turns text into synthesised audio through neural voices. Around those two directions it also offers speech translation, custom vocabularies and keyword spotting. Document translation, sentiment scoring and key-phrase extraction are text or language operations provided by other Azure AI services, so they do not describe the speech service's core purpose.
Why the other options are wrong
- A. Document translation is a text operation, not speech processing.
- B. Sentiment scoring analyses written language and does not require audio.
- D. Key-phrase extraction is a text analytics feature of Azure AI Language.