ASR & Transcription Functional Overview & API Integration
Capacity Private Cloud ASR converts speech to text — both grammar-based recognition, which matches an utterance against a defined grammar and returns a structured semantic result, and free-form transcription, which returns the spoken words verbatim. This page is a starting point: it routes you to the product overview, the supporting reference articles, and the developer API definitions.
Start here — ASR & Transcription overview
Speech Products: ASR & Transcription — what the recognition and transcription products do, where each fits, and the capabilities they expose.
Functional Overview & Background
These reference articles cover the grammar and semantic-interpretation concepts behind recognition. They are the foundation for writing grammars that return the results your application expects.
| Article | What it covers |
| An SRGS Introduction | The Speech Recognition Grammar Specification — the standard used to define what the recognizer listens for. |
| A Simple Grammar | A worked first grammar, from structure to a working recognition result. |
| Using GrXML Grammars | Working with the XML form of SRGS grammars. |
| Intro to Semantic Interpretation | How semantic interpretation (SI) tags turn a recognized phrase into a structured result. |
| SISR Basics | The Semantic Interpretation for Speech Recognition standard and how to use it in grammars. |
Developer API Reference
The ASR developer references are published on the developer portal (developer.lumenvox.com) and remain the system of record. Use these when implementing directly against the gRPC API, configuring recognition, or wiring up reporting.
| Reference | Description |
| ASR functional overview | Functional overview of ASR and transcription on the developer portal. |
| ASR integration | API integration guide for ASR and transcription. |
asr-lumenvox.proto | gRPC API definition for ASR and transcription interactions. |
| ASR configuration | Configuration settings for recognition and transcription. |
reporting.proto | gRPC API definition for usage and results reporting. |