Hybrid Trigger Word Detection



Hybrid Trigger Word Detection (HTWD) service determines the presence of a pre-specified trigger word in voice input by the user.

It performs embedded detection of the trigger word first before server-based detection in order to minimize the misrecognition of trigger words.

Since it takes time to communicate with the server, it can be used without server-based detection for faster recognition speed.

If trigger word detection is successful, HTWD service will complete the process. If it fails, HTWD service will continue to wait for the user's voice.


Image for the keyword detection process of HTWD Engine


HTWD service by LG AI Platform supports the following features:

HTWD Engine feature
Feature Description
Support for various trigger words

hilg, heycloi, airstar

Multi-language support

Supports Korean and English



HTWD service combines embedded trigger word detection with server-based trigger word detection.


Image for the architecture of HTWD Engine


Examples of Use

The hybrid keyword detection function can be used in all devices equipped with a speech recognition function. This service allows a user to initiate speech recognition without touching the device.


  • Devices with a virtual assistant

You can control the device by the voice from a mobile device equipped with an AI virtual assistant system.

Image for devices with voice assistant system

  • Home appliances capable of speech recognition​

It can be applied to operate home appliances with voice recognition-capability.

Image for the home appliance with speech recognition

  • Robot control

Operate and control robots using natural language commands.

Image for the robot device