AIVISION: Building a Vietnamese Speech AI Platform
Discover how AIVISION builds high-accuracy Vietnamese Speech AI. Explore STT, TTS, and LLM solutions for global enterprises.
The Vietnamese speech AI market is experiencing rapid growth, yet the primary challenge remains accuracy and contextual understanding of the native language. For businesses, selecting a robust Vietnamese Speech AI platform is not just a technical decision; it is a critical factor in operational efficiency and customer experience. This article explores the journey of AIVISION, a Vietnamese speech AI company, delivering solutions validated across hundreds of enterprise projects in Vietnam and internationally.
Why Vietnamese Speech AI Is Challenging
Many assume that adapting existing large language models (LLMs) is sufficient for Vietnamese. However, Vietnamese has complex phonetic and orthographic features, particularly code-switching between Vietnamese and English in business environments.
When deploying automation systems, specific challenges include:
- Real-world accuracy: Background noise, soft speech, or specialized medical and financial terminology significantly increase word error rates (WER).
- Code-switching: Vietnamese users frequently insert English words into sentences (e.g., "Please install this app for me"). General-purpose models often handle this poorly, leading to semantic loss.
- Latency requirements: In customer support calls or video conferences, latency must be extremely low to ensure natural conversation flow.
AIVISION’s Core Data and Technology
The quality of an AI model depends directly on its training data. AIVISION has invested heavily in building a large-scale, high-quality Vietnamese dataset.
Large-Scale Vietnamese Corpus
AIVISION has assembled a Vietnamese speech corpus of 690,517 hours. Of this, 9,043 hours were meticulously curated to train its accurate Speech-to-Text model. This is a significant competitive advantage, allowing the model to deeply understand Vietnamese pronunciation, intonation, and vocabulary.
Real-World Performance
According to internal benchmarks on held-out test sets, AIVISION’s model achieves an average word error rate (WER) of 11.84%. This means AIVISION’s model achieves a low error rate in its processing.
Here are specific metrics across different datasets:
| Dataset | Characteristics | WER (%) |
|---|---|---|
| FLEURS-vi | Standard Vietnamese | 4.58% |
| VIVOS | Conversational Vietnamese | 6.83% |
| ViMedCSS | Medical, with English terms | 15.68% |
| Real Business Meetings | Noise, multiple speakers | 20.29% |
These figures demonstrate that AIVISION does not just optimize for ideal conditions but handles complex scenarios like business conferences and medical recordings with interspersed English effectively.
A Comprehensive Product Ecosystem
AIVISION does not offer a single feature but builds a closed-loop Vietnamese Speech AI ecosystem, catering to diverse needs from software development to end-user applications.
AIVISION Speech-to-Text (STT)
This core product supports real-time speech recognition via WebSocket and file transcription via REST API. A standout feature is its ability to handle Vietnamese-English code-switching and provide word timestamps, making applications like video captioning and conversation analysis more accurate. Additionally, AIVISION STT supports 24 other languages for translation apps, expanding its global utility.
aiv-tts-S.1.0: Natural and Flexible Voice
For Text-to-Speech, AIVISION provides natural Vietnamese and English voices with streaming output to reduce latency. Notably, it supports telephony formats (8 kHz G.711 μ-law / A-law), making it ideal for call centers. The voice cloning feature, which requires only 20 seconds to 2 minutes of recorded audio (with consent), allows for highly personalized user experiences.
aivision-L1.0 and Practical Applications
Combined with applications on the s2speech.com platform such as Hana (voice chat with AI characters), AI Voice Note (recording, transcribing, and meeting minutes), Live Translate (real-time subtitles), and Multilingual Meeting rooms, AIVISION is practically solving the multilingual communication challenge.
Solutions for Enterprises and Developers
AIVISION has experience deploying speech AI for hundreds of enterprises and corporations in Vietnam, the USA, Mexico, the Philippines, and Thailand. This multi-national presence proves the platform’s adaptability to different cultural and technical contexts.
Reasonable and Flexible Pricing
One of the major barriers to AI adoption is cost. AIVISION applies a token-based pricing model with competitive rates. To support new users, every account receives $5 of free usage daily. Enterprises can top up flexibly via bank transfer, starting from 50,000 VND (approx. $2). You can view details on our Pricing page.
Easy Integration for Developers
Creating API keys and starting to call the API can be done directly in the management console. This shortens product development time, allowing technical teams to focus on business logic rather than AI infrastructure.
Tips for Deploying Speech AI
Based on real-world deployment experience, AIVISION offers the following advice for businesses:
- Test the audio environment carefully: Evaluate microphone quality and noise levels at deployment points (call centers, conference rooms, phones).
- Handle code-switching: If your users frequently mix foreign languages, prioritize models capable of handling multilingual input within the same sentence.
- Start with small data: Try testing with a small group of your actual data to measure WER before scaling up.
Conclusion
AIVISION’s journey in building a Vietnamese Speech AI platform is proof that investing in high-quality data and specialized technology can make a significant difference in accuracy and efficiency. As a Vietnamese speech AI company, AIVISION not only provides technology but also partners with businesses in their voice-driven digital transformation.
If you are looking for an accurate, stable, and easy-to-integrate Speech-to-Text or Text-to-Speech solution for your product, start today.
Start free to experience AIVISION’s features and feel the difference in Vietnamese speech recognition accuracy.
Frequently asked questions
Does AIVISION support Vietnamese speech recognition with mixed English?
Yes, AIVISION Speech-to-Text is specifically designed to handle code-switching between Vietnamese and English effectively, improving accuracy in business environments.
How can I start using AIVISION’s API?
You can create an account and obtain an API key from the management console at https://s2speech.com. Every account is granted $5 of free usage daily to test STT, TTS, and LLM services.
How does AIVISION's speech AI solution work?
According to internal benchmarks, AIVISION’s model achieves an average WER of 11.84%, thanks to training on a large, carefully curated Vietnamese dataset.
Does AIVISION support audio formats for call centers?
Yes, the aiv-tts-S.1.0 Text-to-Speech product supports telephony formats such as 8 kHz G.711 μ-law / A-law, making it suitable for PBX systems and customer care operations.
What is the cost of using AIVISION?
AIVISION uses token-based pricing with competitive rates. You can view details on [Pricing](/en/pricing) or reach out via [Contact](/en/contact) for tailored package advice.
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By
Dr. Giang Vo — CEO, AIVISION
Dr. Giang Vo is the CEO of AIVISION, leading the development of s2speech — speech recognition, AI voices and a large language model for Vietnamese — and working with companies at home and abroad on their deployments.