Simultaneous Captioning
▶ QUICK SUMMARY
lingo provides real-time simultaneous captioning for in-person, remote and hybrid events in Brazil — via AI (ASR + MT) or human captioner. Display on stage screen, participant laptops or in the Zoom/Teams app. Accessibility and multilingual events.
What is simultaneous captioning and when to use it
Simultaneous captioning — also known as real-time closed caption or CART (Communication Access Realtime Translation) — is the display of text on screen as the speaker talks, with a 1 to 3-second delay. It differs from simultaneous interpretation: instead of audio through a receiver, the participant reads text on screen.
Primary uses: (1) Accessibility — participants with hearing impairment or low hearing; (2) Multilingual events — English captions for international audience while speaker presents in Portuguese; (3) Hybrid events — remote participants receive synchronized captions with the video feed; (4) Recording and documentation — captions integrated into the event video file.
AI captioning vs human captioner
AI captioning (ASR — Automatic Speech Recognition + machine translation) achieves 90–97% accuracy in Portuguese and English with clear voice and quality microphone. Suitable for internal events, webinars, training sessions and situations where small errors have no critical consequence. Cost: 30–50% below human captioning.
The human captioner achieves 99%+ accuracy and is indicated for public events, live broadcasts, content that will be archived and published, and any context where text accuracy is legally or commercially relevant. lingo offers both modalities with delivery via platform, .srt file or direct integration to the venue projection system.
Technical configuration and supported platforms
In-person: captions are displayed on the event screen via caption software integrated to the venue projection system, or on individual tablets via local network. lingo connects to the speaker microphone audio feed via professional audio interface.
Remote and hybrid: Zoom supports native closed caption (CC button) with third-party integration via API; Teams Premium has built-in automatic captioning with multi-language support; Google Meet Enterprise has automatic captioning in English, Spanish and Portuguese. lingo configures the integration and monitors quality in real time. Quote in 60s: WhatsApp +55 11 97534-6423.
FAQ
Does simultaneous captioning replace simultaneous interpretation?
No — they are complementary services. Interpretation delivers audio through receivers (participant hears the translation). Captioning displays text on screen (participant reads). For multilingual events with high cognitive load, interpretation is superior. For accessibility and events where reading is more convenient than wearing a receiver, captioning is the right choice.
Can I have interpretation and captioning at the same event?
Yes. lingo configures both in parallel: the interpreter (human or AI) delivers audio through UHF receivers, and the captioning system displays text on screen simultaneously.
Is the caption file available after the event?
Yes. lingo delivers the caption file in .srt, .vtt or .txt format after the event, indexed by timestamp — useful for post-event video production with embedded captions.
Does AI captioning work with regional accents?
Accuracy varies. Brazilian Southeast accents (São Paulo, Rio) achieve 95%+ accuracy. Northeast and North accents may fall to 85–90%. For events with strong regional accents, lingo recommends human captioning.
Does lingo provide captioning in languages other than Portuguese and English?
Yes. Spanish, French, German and Italian are supported with 90%+ AI accuracy. For Asian languages, human captioner is recommended. Quote via WhatsApp +55 11 97534-6423.
Lingo Qi Interpretações LTDA · CNPJ 53.834.741/0001-34 · Guarulhos, SP
lingo also provides in-person simultaneous interpretation with UHF system for companies that need both services.