Voice

CMU Sphinx

CMU Sphinx is a powerful open-source speech recognition system.

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CMU Sphinx screenshot

Overview

CMU Sphinx is an open-source speech recognition system developed at Carnegie Mellon University. It was designed to make speech technology accessible to everyone, from small developers to large organizations. With support for many languages and dialects, it's a versatile solution for various applications in voice recognition.

The system is highly customizable, allowing users to modify existing models or create new ones. CMU Sphinx is ideal for tasks such as transcription, voice commands, and even in mobile applications. Its robustness, combined with an active community, makes it a popular choice in the field of speech recognition.

One of the key strengths of CMU Sphinx is its ability to run on various platforms, including desktop and embedded systems. This flexibility means it can be used in different environments, whether for research or implementing voice recognition in commercial products.

Key features

Cross-platform support

CMU Sphinx works on various operating systems, including Windows, Mac, and Linux.

Customizable acoustic models

Users can adapt existing models or create new ones for specialized tasks.

Language support

The system supports multiple languages and dialects, expanding its usability.

Real-time recognition

CMU Sphinx can process speech in real-time, allowing for interactive voice applications.

Lightweight footprint

The system is designed to be efficient, making it ideal for mobile devices and embedded systems.

Open-source

Being open-source means that users have full access to the source code for modifications and improvements.

Active community

A strong community of developers and researchers contributes to continuous enhancements and support.

Extensive documentation

CMU Sphinx offers comprehensive guides and resources, making it easier for new users to get started.

Pros & Cons

Pros

  • Free to use
  • Flexible and customizable
  • Good performance
  • Widely supported
  • Highly adaptable

Cons

  • Steeper learning curve
  • Performance varies
  • Limited built-in models
  • Slow development pace
  • Requires technical skills

Rating Distribution

5
1 (33.3%)
4
2 (66.7%)
3
0 (0.0%)
2
0 (0.0%)
1
0 (0.0%)
4.0
Based on 3 reviews
Hanns S.CEOEnterprise(> 1000 emp.)
April 13, 2022

Good basic set for scalable big server solutions

What do you like best about CMU Sphinx?

Good documentation. But at the moment I am also working on other systems and I am not finished yet. So I can't give more advantages at the moment.

What do you dislike about CMU Sphinx?

Since I'm still testing other products at the moment, I can't conclusively list negatice aspects here either.

What problems is CMU Sphinx solving and how is that benefiting you?

We implement a speech recognition solution for the low resource but very important Luxembourgish. The benefit is that we can depend on a German corpus, since Luxembourgish is near to German.

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Donata S.Docente di OOPSmall-Business(50 or fewer emp.)
January 17, 2022

Helping children with Java & Sphinx

What do you like best about CMU Sphinx?

English linguistic model. With this LM I can interact with my Java programs

What do you dislike about CMU Sphinx?

I'd like to expand italian and german linguistic models, but I cannot find complete tutorials

What problems is CMU Sphinx solving and how is tha...

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krishna p.Co-OwnerSmall-Business(50 or fewer emp.)
April 20, 2018

An excellent automatic speech recognition toolkit.

What do you like best about CMU Sphinx?

-More accurate.

-Get online speech to text solutions.

-It is very fast with small dictionaries and keywords search.

-Comparatively this speech recognition library is more easy to use.

What do you dislike about CMU Sphinx?

We are satisfied with the results a...

Read full review on G2 →

Company Information

LocationPittsburgh, PA
Employees1
LinkedInView Profile

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FAQ

Here are some frequently asked questions about CMU Sphinx.

CMU Sphinx is an open-source speech recognition system developed at Carnegie Mellon University.

Yes, CMU Sphinx is open-source and free to use.

Absolutely! Users can modify existing models or create new ones to meet their needs.

CMU Sphinx works on Windows, Mac, Linux, and various embedded systems.

The accuracy can vary based on the models used and background noise, but it is generally reliable.

Yes, it supports various languages and dialects.

CMU Sphinx has a lightweight footprint and can run on a variety of hardware, including low-end devices.

There is a strong community and extensive documentation available on the official website for support.