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Offline Speech Recognition

Ilgar Lunin - Sep 20, 2021

Accurate offline speech recognition

  • Supported Platforms
  • Supported Engine Versions
    4.25 - 4.27
  • Download Type
    Engine Plugin
    This product contains a code plugin, complete with pre-built binaries and all its source code that integrates with Unreal Engine, which can be installed to an engine version of your choice then enabled on a per-project basis.

Allows you to recognize speech from more than 15 languages, without relying on any cloud service or subscription. Instead, a language server is a separate process on your machine, which talks with your game. The language server app is public ( https://github.com/IlgarLunin/vosk-language-server ), you can fork it and customize, distribute with your game, run it without any user interface.


Unreal engine client is dead simple communication with language server. It connects to it, records, and feeds your voice to the language server, the server sends recognized voices as text back to unreal.


This is streaming voice recognition, and you can implement simple conversations with your NPC without any user input except voice. "Ok robot, do this", "Ok robot, do that" etc.


Download latest language server: https://github.com/IlgarLunin/vosk-language-server/releases


Video demonstration: https://youtu.be/iJVCsuuC5A4

Example project: here (Unreal Engine 4.27)

Technical Details

Features:

  • No dependencies on other paid cloud services
  • One time payment
  • The server can handle multiple clients at the same time
  • Easy to setup
  • No internet required


Code Modules:

  • VoskPlugin (Runtime)


Number of Blueprints: 0

Number of C++ Classes: 1

Network Replicated: No

Supported Development Platforms: Windows, Mac, Linux

Supported Target Build Platforms: Windows, Mac, Linux

Documentation: https://github.com/IlgarLunin/VoskPlugin-docs

Discord: https://discord.gg/Tkf7xe2