CELT

Description
CELT (Constrained Energy Lapped Transform) is an audio compression codec designed for high-quality, low-delay audio transmission (i.e. for telephony or network music performance). It has been merged into the IETF Opus codec and is now obsolete. It should be noted that due to the work in progress nature of CELT, compatibility may not be preserved between releases.

Information

 * A High-Quality Speech and Audio Codec With Less Than 10 ms delay
 * A Full-Bandwidth Audio Codec with Low Complexity and Very Low Delay,
 * CELT Readme file
 * Presentations about CELT
 * libcelt API reference
 * CELT internal API reference

Software

 * CELT releases

Applications

 * Ekiga (VoIP / videoconferencing)
 * FreeSWITCH (telephony)
 * netjack
 * RoarAudio (sound server)
 * Soundjack (network music performance)

Libraries

 * GStreamer

Links

 * CELT homepage
 * Some sample CELT-encoded audio can be found here