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Speech compression format

The Speex project aims to build a patent-free voice codec. Unlike codecs like MP3 and Ogg Vorbis, Speex is specially designed for compressing voice at low bit-rates (in the 8-32 kbps/channel range) for applications such as voice over IP (VoIP). Other possible applications include Internet audio streaming at low bit-rate, and archiving of speech data (e.g. voice mail). The license under which this software is released is similar to a revised BSD license.


Heckert gnu.small.png This is a GNU package:speex


Download version 1.0.5 (stable)
released on 7 May 2005

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Related Projects


LicenseVerified byVerified onNotes
XiphJanet Casey11 July 2002

Leaders and contributors

Jean-Marc Valin Maintainer

Resources and communication

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Software prerequisites

Kind Description
Weak prerequisite libtool (all three for building from CVS)
Weak prerequisite libogg (for command line executables)
Weak prerequisite autoconf
Weak prerequisite automake

This entry (in part or in whole) was last reviewed on 29 May 2010.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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