Offline Speech Recognition Chips for Smart Voice Control Applications
Waytronic WTK6900 series provides high-performance offline voice recognition IC solutions with local processing, low latency, and reliable voice command recognition for smart home, appliances, automotive, and industrial devices.
A voice recognition IC is a dedicated semiconductor device that enables electronic products to understand human voice commands.
Unlike cloud-based voice assistants, offline voice recognition ICs process voice commands locally without internet connection, providing faster response, better privacy protection, and reliable operation in various environments.
Waytronic WTK6900 series integrates AI-based speech recognition algorithms, noise reduction, and command word recognition technologies into compact IC solutions.
| Parameter | WTK6900P | WTK6900HA | WTK6900HC | WTK6900HD4 | WTK6900FC |
|---|---|---|---|---|---|
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| Product Position | Entry Ultra-Low Power | Mid-Range Smart Home | Voice + BT Audio Combo | Baby Cry Specialist | Flagship Far-Field |
| Recognition Distance | 0.5-2 meters | 3-5 meters | 5 meters | 1-5 meters (indoor) | 5-8 meters |
| Recognition Rate | 90% (Quiet) | 95% (Quiet) | 95% (Quiet) | 92% (Cry Detection) | 97% (Quiet) |
| Command Words | 15 | 40 / 80 | 80 / 150 | Cry Pattern Detection | 300 + Self-Learning |
| Algorithm | DNN-HMM Lightweight | DNN-HMM Offline | DNN-HMM Offline | Cry Pattern Recognition | DNN-HMM Advanced |
| Special Features | Built-in 0.32W Amp | No Crystal Required | Bluetooth 5.1 (A2DP/HFP) | Cry Type Classification | Self-Learning + Snore Detection |
| Power Consumption | 5-10mA / 5μA Sleep | 15-20mA / 100μA Sleep | 25-30mA / BT 40mA | < 25mA / 10μA Sleep | 50-60mA Active |
| Audio Output | PWM Direct Drive | DAC (Ext Amp Req) | Dual 16-bit DAC | GPIO Pulse Output | High-Performance DAC |
| Wireless | — | — | BT 5.1 + BLE | — | OTA Update Support |
| Control Interface | UART Frame | UART (Up to 3Mbps) | UART (Up to 3Mbps) | UART + GPIO Pulse | UART (Up to 3Mbps) |
| Operating Temp | -40 ~ +85°C | -40 ~ +85°C | -40 ~ +85°C | -40 ~ +85°C | -40 ~ +85°C |
| Package | SOP8 (Compact) | SOP16 / SSOP24 / QFN32 | SOP16 / SSOP24 / QFN32 | SOP16 / SSOP24 / QFN32 | SSOP24 |
| WTK6900 Tier | Entry | Mid-Range | Integrated Audio | Specialized | Flagship |
As a local voice recognition IC, the WTK6900 series enables offline speech recognition, command word self-learning, and advanced noise suppression. These chips are trusted by engineers worldwide for privacy-first voice control in smart home, automotive, industrial, and healthcare applications. No internet required, no cloud subscription, no latency.
Hands-free voice control · Privacy-protected local processing · Zero cloud dependency
Waterproof voice interface · Hands-free operation · Hygiene-friendly interaction
In-vehicle voice command · Noise cancellation in 80dB environment · Hands-free calling
Baby cry detection · Voice-activated emergency call · Medication reminder systems
Compare different voice recognition solutions and see how WTK6900 Series delivers offline privacy, industrial reliability, and cost-effective integration.
| Comparison | WTK6900 Series | Cloud Voice Solution | WiFi Voice Module | Simple Keyword Spotting |
|---|---|---|---|---|
| Core Positioning | Offline Voice Recognition IC with DNN-HMM | Cloud-based ASR (Alexa, Google) | ESP32 + Cloud API | Basic keyword detection |
| Privacy & Security | 100% Local Processing, No Data Upload | Voice data sent to cloud servers | WiFi required, data transmitted | Local (limited capability) |
| Internet Dependency | Zero — Works Offline Always | Requires stable internet | Requires WiFi connectivity | Offline |
| Response Latency | < 500ms (Local Processing) | 1-3 seconds (Network + Cloud) | 1-2 seconds | < 300ms |
| Recognition Accuracy | 90-97% (Model Dependent) | Very High (Cloud Computing) | High (Cloud-dependent) | Low-Medium (60-80%) |
| Power Consumption | 5-60mA (Model Dependent) | High (WiFi/LTE module) | 15-80mA (WiFi active) | Low (1-5mA) |
| Recurring Cost | Zero (One-Time Chip Cost) | Cloud API fees per request | Potential cloud fees | Zero |
| Development Complexity | UART integration, 1-2 weeks | Complex (OAuth, API, cloud SDK) | Moderate (WiFi + API) | Simple (limited features) |
| Main Trade-off | Fixed command set (no NLU), requires custom firmware for new commands | Privacy concerns, internet dependency, recurring costs | High power, connectivity issues | Low accuracy, very limited vocabulary |
The table above compares four common voice control architectures. WTK6900 Series is the only solution designed specifically for privacy-first, offline, cost-effective voice recognition with industrial-grade reliability.
Not sure which voice recognition IC fits your project? Pick your application below and get a direct recommendation.
Smart switches · Voice toys · Wearables · 2×AAA battery for 12+ months
Pick WTK6900P — SOP8 ultra-compact, 5μA sleep, built-in 0.32W amp, 15 commands sufficient
Kitchen appliances · Bathroom fixtures · Lighting control · 3-5 meter reliable range
WTK6900HA (Balanced — 5m range, 80 commands, no crystal) · Primary recommendation for smart home
Voice command + Music streaming · Hands-free calling · BT 5.1 integrated
Pick WTK6900HC — Voice Recognition + Bluetooth 5.1 combo chip, A2DP/HFP/SPP, eliminates separate BT module
Baby cry detection · Smart crib · Nursery automation · Sleep quality monitoring
Pick WTK6900HD4 — Specialized baby cry recognition, 92% accuracy, cry type classification, 300ms response
Large rooms 8+ meters · Self-learning commands · Advanced features · Flagship performance
Pick WTK6900FC — 8-meter far-field, 300 commands, self-learning capability, snore detection, OTA update
Free UART test tools, voice model training platform, reference designs, EVBs, and video tutorials — everything you need to bring your voice-controlled product to market fast.
Upload your command word list, generate optimized voice model in 24 hours. Multi-language, multi-accent support.
Free with your Waytronic account. Start using it today.
EVB test board · Reference schematics · UART protocol library · Voice model files · SDK with C examples · Step-by-step video tutorials
All included — no extra cost, no hidden fees.
An Offline Voice Recognition IC is a dedicated chip that processes and recognizes voice commands locally without cloud connection. It integrates voice processing algorithms and enables fast, private, and low-power voice control for embedded products.
Voice Recognition IC is the core chip designed for mass production, offering smaller size, lower cost, and flexible PCB integration. Voice modules integrate ICs with peripheral components, making them suitable for rapid prototyping and evaluation.
WTK6900 series is designed for smart home devices, smart locks, appliances, toys, healthcare products, automotive electronics, and industrial equipment requiring offline voice control.
The chip captures voice signals through a microphone, processes voice features using embedded AI algorithms, and outputs recognized commands directly to the host MCU. No internet connection or cloud server is required.
Yes. Different language versions can be supported through firmware customization. Contact us for specific language requirements.
WTK6900 supports commonly used electret and MEMS microphones. The microphone selection depends on application requirements such as recognition distance, noise environment, and product design.
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