Speex: Difference between revisions
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= Speex is deprecated | = The Speex codec is deprecated! Xiph recommends you use the superior '''[[Opus]]''' codec instead. = | ||
== Website == | == Website == | ||
The [http://www.speex.org/ Speex homepage] has all the project info. | The [http://www.speex.org/ Speex homepage] has all the project info. | ||
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== Hardware == | == Hardware == | ||
See [[Speex hardware]] for a partial list of supported hardware | See [[Speex hardware]] for a partial list of supported hardware | ||
== Tasks == | == Tasks == | ||
These are some improvements that could be made to Speex. | These are some improvements that could be made to Speex. | ||
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* Documentation | * Documentation | ||
** Use questions from the mailing list to create a better FAQ on | ** Use questions from the mailing list to create a [[Speex_FAQ|better FAQ]] on this wiki | ||
** Update the Speex manual based on recent papers | ** Update the Speex manual based on recent papers | ||
** Improve libspeex documentation | ** Improve libspeex documentation | ||
Revision as of 07:52, 6 July 2016
The Speex codec is deprecated! Xiph recommends you use the superior Opus codec instead.
Website
The Speex homepage has all the project info.
There is also a Speex FAQ.
Hardware
See Speex hardware for a partial list of supported hardware
Tasks
These are some improvements that could be made to Speex.
Let us know if you'd like to work on one of them.
- Speech/signal processing (DSP design)
- Improve noise suppression (get rid of musical noise) and residual echo suppression
- Improve packet-loss concealment (PLC)
- Re-write the built-in voice activity detector (VAD)
- Improve the 2.15 kbps vocoder mode (there are even 4 unused bits left to use)
- Algorithmic optimizations (see if some searches can be simplified/approximated)
- Complete fixed-point (DSP development)
- Wideband
- VBR
- Rest of the narrowband modes
- Preprocessor (noise suppression, AGC)
- Jitter buffer
- Arch-specific optimization
- More...
- Tune (playing with parameters)
- Noise weighting filter
- Perceptual enhancement
- Features (plain C programming)
- Implement maximum VBR bit-rate
- Implement peeling (write functions to strip some of the bits)
- Peel high-band (wideband -> narrowband)
- Transform 24.6 kbps mode to 15 kbps mode
- Documentation
- Use questions from the mailing list to create a better FAQ on this wiki
- Update the Speex manual based on recent papers
- Improve libspeex documentation
- Write good example code