Speex

Speex: Open-Source Speech Audio Compression

Patent-free audio compression format for speech, integrating well with internet applications and protocols, delivering good performance at low bitrates

What is Speex?

Speex is an open-source software codec (encoder/decoder) for compressing speech audio in a very efficient way. It is designed primarily for internet applications and is optimized for compressing voice at low bitrates while still maintaining good speech quality.

Some key features of Speex include:

• Open-source and completely free to use - it is not restricted by any patents or royalties
• Performance focused on voice signals in the range of 4kHz to 22kHz
• Good compression ratio while retaining intelligible speech
• Low algorithmic delay suitable for communications
• Supports a wide range of bitrates from 2 kbps to 44 kbps
• Robust error handling features
• Integrates well with common internet transport protocols

Speex aims to provide a free alternative to proprietary speech codecs while offering comparable voice quality. Its open nature and optimization for low bitrate transmission over the internet make it useful for applications like Voice over IP (VoIP), audio chat, game chat, and podcasts.

Speex Features

Official Links