Automatic Live Captions & Dubbing Using Secure Reliable Transport (SRT)

Easily embed 608 captions and add AI voice translations into SRT streams at scale. SyncWords Platform is a cloud-based caption encoder that supports both automated live AI & CART human captions. Ideal for live news, sports broadcasts and 24/7 live SRT streams.

Subtítulos y traducciones automáticas en directo para eventos virtuales e híbridos

High-end Caption Encoding & AI Dubbing Solution for any industry

Caption service companies
Event organizers
Empresas audiovisuales
Houses of Worship

Scalable Live Captioning & AI VOICE Dubbing for SRT Streams

SRT is quickly becoming the industry standard for live broadcast production. Leverage SyncWords to easily add live AI-powered or professional human captions (CART) to an SRT stream as CEA-608 data. Generate real-time captions in all 608-supported languages like English, Spanish, French, etc., and provide AI voice translations to 50+ languages. Perfect for broadcasters using or transitioning to an IP workflow, with no need for hardware.


One-Stop Platform to cover all captioning & translation needs

One-Stop Platform to Cover All Captioning and Translations Needs and meet accessibility requirements
Designed for high bitrate/resolution video streaming
One-Stop Platform to Cover All Captioning and Translations Needs with instant language scalability
Meet accessibility regulations for live programming
One-Stop Platform to Cover All Captioning and Translations Needs to expand audience reach and increase viewership
Framerate support: almost all video framerates covered for domestic and international delivery
One-Stop Platform to Cover All Captioning and Translations Needs with in-player delivery
Highly scalable captioning solution to support unlimited concurrent live streams within minutes
One-Stop Platform to Cover All Captioning and Translations Needs with instant localization of live programming to 100+ languages
Compatible with LiveU, TVU, Ateme, and other video production software for seamless integration into live streaming workflows
One-Stop Platform to Cover All Captioning and Translations Needs with instant localization of live programming to 100+ languages
Support for HEVC codec (H.265) to optimize bandwidth while preserving pristine video quality
One-Stop Platform to Cover All Captioning and Translations Needs with instant localization of live programming to 100+ languages
Integration with AWS Elemental MediaConnect for flawless live caption insertion and contribution to AWS Elemental MediaLive & MediaPackage
One-Stop Platform to Cover All Captioning and Translations Needs with instant localization of live programming to 100+ languages
Proprietary Sync technology to ensure captions appear on screen with no delay to the spoken words. Easy selection of PID audio track for live AI captions & dubs.
One-Stop Platform to Cover All Captioning and Translations Needs with instant localization of live programming to 100+ languages
Works with Amazon IVS (Interactive Video Service) for low-latency caption insertion
One-Stop Platform to Cover All Captioning and Translations Needs with instant localization of live programming to 100+ languages
Low-latency video streaming: sub-second caption insertion for SRT streams

Adding SyncWords to your live SRT stream means: all the advantages of SRT streaming (quality, security, and reliability) with scalable real-time captions & AI voice translations.

One-Stop Platform to Automate
Live Captioning & Dubbing for
SRT Streams at Scale

Designed for high-end broadcast workflows that require live captioning & dubbing. Insert 608 data & AI voice translations into your SRT stream for a cost-effective real-time captioning & localization solution. Works for any live program.
Fully cloud-based, hardware-free.


Live AI Captioning

Automatic captions instantly available in all languages supported by CEA-608 including English, Spanish, Portuguese, and French. Choose between source or translation language.

Create custom dictionaries to enhance captioning accuracy of your live stream. Include specialized terminology, acronyms, and proper names. Store as many custom dictionaries as needed for various types of live programming.

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Live CART Captioning

Use SyncWords managed services to provide professional human captioning in English, Spanish, Portuguese, or French.

The platform is compatible with all standard human captioning/CART systems. Bring your own captioning service if needed.

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Next-generation Live AI Voice Dubbing

SyncWords’ has developed new innovative technology that allows the addition of AI voice translations to live SRT streams. Compatible with high-end broadcast workflows.

Take all your live programming to another level by instantly delivering automatic real-time voice translations in 50+ languages with any live SRT stream. Easily provide audio translations in one or more languages simultaneously on the same live stream, with no hardware or intricate workflow adjustments required.

Simple solution allowing audiences to hear audio translations in their preferred language. Over 900 female and male AI voice options and several regional accents supported for a more inclusive environment. Unlimited concurrent live streams. Ideal for live UHD channels.

Combine with SyncWords live captioning solutions to meet mandated accessibility regulations and provide real-time captions for the deaf and hard of hearing.

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Live SRT Streams

SyncWords will take your SRT streams, insert 608 captions & AI voice translations and push the streams back to your production environment. This allows you to monitor your captioned & dubbed program ahead of deployment. Map all your streams to SyncWords for instant caption & dubbing delivery.

SyncWords’ platform provides a simple way to push or pull SRT streams while generating perfectly synchronized automatic real-time captions & AI voice translations. Our cloud-based embedded captions are fully featured and support all 608 positioning and formatting.

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Principales ventajas

Designed for high quality streaming
Compatible with AWS Elemental, TVU & others
Enhanced accuracy with ASR dictionaries
Highly cost-effective
Unlimited concurrent streams
Hassle-free: 24/7 availability
7 source languages for CEA-608: Latin character sets
Poco intervencionismo: sin transcodificación ni hardware, totalmente basado en la nube
Mapping of streams to our caption engine
Support for SCTE-35 market pass-through
Selectable audio PID channels for ASR ingest
Audio ducking for AI dubbing with volume control

Create a SyncWords service for each of your SRT streams. Once each service has been mapped to your corresponding channel, it can be used as many times as needed, without needing to alter any settings. Services can be turned on and off for event-based workflows or left running for 24/7 broadcasts.

Map All Your SRT Streams to SyncWords to
Enable 608 Captioning & AI Voice Dubbing

SRT Mapping Timeline

Live Embedded Captioning Workflow Using SRT Streaming Protocol

Scalable and cost-effective, no hardware encoders required. Easily insert automated live AI-powered or human captions and AI voice translations to any live SRT stream. SRT listener and caller workflows supported. Perfect for live broadcasting.

Client SRT video Stream
608 captionS
ASR or Human
Support for
CEA-608 languages
Automatic Voice
Support for
50+ languages
(broadcast, stream)
SRT Video StReam
With Captions & Dubs to Client

Beyond SRT.
Support for Different Live Streaming Protocols

One-stop shop for automatic live captioning, subtitling and dubbing. Power accessible and inclusive live programming whether streaming via HLS, SRT, or RTMP(S).

HLS Streaming ProTOCOL

Easily insert real-time automatic captions, subtitles and AI audio translations into a livestream to enhance accessibility and inclusivity. Highly cost-effective and scalable solution for streaming your live video content in multiple languages on any device or screen. Unlimited concurrent channels to broadcast different types of live programs.

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RTMP(S) Streaming protocol

RTMP (real-time messaging protocol) allows you to live stream video over the internet. Embed CEA-608 captions in your live stream for delivery to YouTube, Vimeo, Facebook, and other social media platforms with no encoders or complex workflows. Automate the captioning process with our RESTful API.

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Use SyncWords’ robust API to add
AI captioning & translation to live streams

SyncWords’ API empowers you to seamlessly manage your streaming services within the SyncWords Live platform. Whether you're setting up new services, accessing service details, making updates, or monitoring real-time status, our RESTful API streamlines the process:

Integration into your existing live streaming software application
Compatibilidad con los formatos de datos JSON y YAML
Información completa sobre puntos finales de API y autenticación
Leverage AWS Elemental MediaPackage DVR functionality while preserving live captions and translations
Postman collection with detailed documentation with quick start guides
Implementación de Swagger

Still have questions about live streaming with AI Captions & Dubs using the SRT protocol?

Let SyncWords' Spotlight Series provide the answers to the most asked questions. Watch more on YouTube

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