Speex: Difference between revisions
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Speex is | '''Speex''' is a legacy Open Source/Free Software patent-free audio [[codec]] designed for speech. It is obsoleted by [[Opus]]. | ||
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* In-progress fixed-point port | * In-progress fixed-point port | ||
* Echo Cancellation (experimental) | * Echo Cancellation (experimental) | ||
* Vorbis psychoacoustics model (experimental) | |||
Note that Speex has a number of features that aren’t in other codecs such as [[Intensity stereo]] encoding, integration of multiple sampling rates in the same bitstream, and a VBR mode. | Note that Speex has a number of features that aren’t in other codecs such as [[Intensity stereo]] encoding, integration of multiple sampling rates in the same bitstream, and a VBR mode. | ||
==References== | |||
The above information was copied from the [http://www.speex.org Speex home page]. | |||
[[Category: Codecs]] | |||
Latest revision as of 21:28, 27 January 2022
Speex is a legacy Open Source/Free Software patent-free audio codec designed for speech. It is obsoleted by Opus.
Technical Information
Speex is based on CELP and is designed to compress voice at bitrates ranging from 2 to 44 kbps. Some of Speex’s features include:
- Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) compression in the same bitstream
- Intensity stereo encoding
- Packet loss concealment
- Variable bitrate operation (VBR)
- Voice Activity Detection (VAD)
- Discontinuous Transmission (DTX)
- In-progress fixed-point port
- Echo Cancellation (experimental)
- Vorbis psychoacoustics model (experimental)
Note that Speex has a number of features that aren’t in other codecs such as Intensity stereo encoding, integration of multiple sampling rates in the same bitstream, and a VBR mode.
References
The above information was copied from the Speex home page.