Merge pull request #183145 from RinaRish/patch-43

Create closed_captions

Author: Court72

articles/communication-services/concepts/voice-video-calling/closed-captions.md

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+---
+title: Azure Communication Services Closed Caption overview
+titleSuffix: An Azure Communication Services concept document
+description: Learn about the Azure Communication Services Closed Captions.
+author: RinaRish
+manager: visho
+services: azure-communication-services
+
+ms.author: ektrishi
+ms.date: 12/16/2021
+ms.topic: conceptual
+ms.service: azure-communication-services
+---
+
+# Closed Captions overview
+
+[!INCLUDE [Private Preview Disclaimer](../../includes/private-preview-include-section.md)]
+
+Azure Communication Services allows one to enable Closed Captions for the VoIP calls in private preview.
+Closed Captions is the conversion of a voice or video call audio track into written words that appear in real time. Closed Captions are never saved and are only visible to the user that has enabled it.
+Here are main scenarios where Closed Captions are useful:
+
+- **Accessibility**. In the workplace or consumer apps, Closed Captioning for meetings, conference calls, and training videos can make a huge difference. 
+- **Accessibility**. Scenarios when audio can't be heard, either because of a noisy environment, such as an airport, or because of an environment that must be kept quiet, such as a hospital. 
+- **Inclusivity**. Closed Captioning was developed to aid hearing-impaired people, but it could be useful for a language proficiency as well. 
+
+## When to use Closed Captions
+
+- Closed Captions help maintain concentration and engagement, which can provide a better experience for viewers with learning disabilities, a language barrier, attention deficit disorder, or hearing impairment. 
+- Closed Captions allow participants to be on the call in loud or sound-sensitive environments.
+
+## Feature highlights
+
+- Support for multiple platforms with cross-platform support.
+- Async processing with client subscription to events and callbacks.
+- Multiple languages to choose from for recognition.
+- Support for existing SkypeToken Authentication
+
+
+## Availability
+The private preview will be available on all platforms. 
+- Android
+- iOS
+- Web
+
+## Next steps
+
+- Get started with a Closed Caption Quickstart (TBD)
+
+
+
+