For Newsmax, live AI dubbing in Spanish, Russian, Greek and French opened up new syndication revenue overseas. Extra reach, with no change to their live production.
Read case study Broadcast & TV accessibility
Live captions and localization for broadcast
Deliver low-latency captions, translated subtitles and AI dubbing directly into your live chain—with dual-pipeline failover and no per-channel licence.
- EIA-608
- AWS Elemental
- Dual-pipeline failover
- No hardware
- No per-channel licence
Trusted by broadcasters and station groups worldwide
Why SyncWords
Engineered for 24/7 linear that can’t go dark
Broadcast engineers don’t buy hype. They buy reliability. SyncWords is cloud-native, with dual-pipeline failover, SCTE-35 pass-through, a clean API, and 24/7 support. Pricing follows usage, not channel count: no per-channel licence and no caption hardware to buy.
- 24/7
- Engineering support
- 99.99%
- Production uptime
- $0
- Hardware to buy
- Sub-2s
- Caption delay in SRT
Cloud workflow
Nothing new in the rack
Captions join your existing SRT or Elemental chain from the cloud. No encoder to buy, no procurement cycle.
Reliable at scale
Built for 24/7
Dual-pipeline resiliency and 24/7 support.
Broadcast & TV
Built for broadcast operations
Fits directly into your existing live pipeline. Clean integration, predictable behavior, SLA discipline.
Captions for accessibility
EIA-608 closed captions embedded into SRT (MPEG-TS) and RTMP(S) streams without re-encoding. On HLS, captions travel as WebVTT; on CMAF ingest, as TTML your packager converts. Burned-in open captions are available on any path.
Live subtitles and AI dubbing
Add translated subtitle and dubbed audio tracks to the live program, with 900+ voices across 86 dubbing languages.
AWS Elemental native
Integrates with MediaConnect, MediaLive and MediaPackage; works with CloudFront. Supports Amazon S3 for file-based workflows.
Dual-pipeline failover
Redundant A/B pipelines and SCTE-35 pass-through keep critical 24/7 feeds resilient. SCTE-35 markers and SSAI are preserved across every language output, so the ad structure matches the original broadcast.
Schedule by channel and slot
Map each channel once, then automate EPG-style scheduling, dictionary updates and event creation directly from broadcast systems.
No encoder required
Put captions directly into live streams from the cloud without buying or maintaining caption hardware.
Pay for usage, not channel licences
Pricing follows the hours, languages and outputs you run. The effective rate falls as committed volume rises.
DRM & multi-CDN ready
Operates with encrypted streams and multi-CDN setups (CloudFront, Akamai, Fastly).
Custom ASR dictionaries
Load presenters, places, acronyms, proper nouns and on-air terminology before airtime so the engine knows the names that matter to your broadcast.
Customizable translation glossary
Set preferred terms per language pair so names, show titles, and on-air phrasing come through the way your audience expects them in every language.
The right caption format for each transport
EIA-608, Teletext and DVB in SRT (MPEG-TS) and RTMP(S), WebVTT in HLS, and TTML into CMAF ingest, all without re-encoding your video.
Feeds your existing encoders
Already have caption encoders? SyncWords drives Evertz and Link Electronics hardware over IP with custom IP/port configuration, and can ingest captions from your own captioners or steno software over a direct EIA-608 Control-A connection.
Ultra-low latency
SyncWords can add as little as half a second to the SRT video path while caption delay typically stays under two seconds.
Profanity filtering
Automatic filtering to keep your broadcast brand-safe and professional.
HD, UHD and HEVC
Works with HD and UHD workflows, including HEVC/H.265 and almost any framerate.
Archiving
Automatically generate a corrected transcript and VTT file for VOD immediately after the broadcast.
Case studies
Proof in production
Real broadcast and distribution deployments. What we built, and how it turned out.
Euronews now runs its Europe Today morning show with live subtitles in around ten languages, widening its European audience without adding to the newsroom's load.
Read case study
Weigel added live same-language captions across its regional news stations, covering its caption obligations without standing up a human captioning team.
Read case studyBroadcast captioning FAQ
Do I need a hardware caption encoder?
No. SyncWords delivers EIA-608 captions from the cloud, with no hardware encoder and no human captioner required.
Which transport protocols are supported?
SRT, HLS, RTMP(S) and CMAF Ingest, with captions inserted without re-encoding your video.
How does it fit an AWS pipeline?
Natively. It works with AWS Elemental MediaConnect, MediaLive and MediaPackage, plus CloudFront. We’re also on AWS Marketplace.
What about reliability on 24/7 linear?
Dual-pipeline failover and SCTE-35 pass-through, 99.99% uptime, and a 24/7 engineering support team.
How much latency does it add?
In SRT workflows, caption delay is under 2 seconds and the video path itself adds a half-second latency. In HLS workflows, viewers typically see captions about 5 seconds behind the program audio.
Does it work with encrypted streams and multi-CDN?
Yes. DRM-encrypted streams and multi-CDN setups (CloudFront, Akamai, Fastly) are supported.
Can I automate scheduling?
Yes. Map each channel once, then drive slot-based scheduling, language outputs and service start or stop from broadcast automation.
Can I add languages later?
Yes. Translated subtitles and AI dubbing can be added from the same feed.
I already own caption encoders. Can SyncWords drive them?
Yes. SyncWords feeds existing Evertz and Link Electronics caption encoders over IP with custom IP and port configuration, and can ingest captions from your own captioners or steno software over a direct EIA-608 Control-A connection. You can migrate to the cloud path at your own pace.
Caption, translate, and localize your broadcasts from the cloud.
Tell us about your feeds, AWS pipeline and caption requirements. Our engineers will scope a workflow with failover built in.