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= Speex =


The [http://www.speex.org/ Speex homepage] has all the project info.


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These are some improvements that could be made to Speex. Let [mailto:speex-dev@xiph.org us] know if you'd like to work on one of them.
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* 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)


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* Complete fixed-point (DSP development)
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** Rest of the narrowband modes
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** Preprocessor (noise suppression, AGC)
** Jitter buffer
** Arch-specific optimization
** More...


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* Tune (playing with parameters)
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** Noise weighting filter
** Perceptual enhancement


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** 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


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* Documentation
</div>
** Use questions from the mailing list to create a better FAQ on the wiki
** Update the Speex manual based on recent papers
** Improve libspeex documentation
** Write good example code
 
== External links ==
 
* [[Wikipedia: Speex]]

Revision as of 21:21, 5 July 2006

Speex

The Speex homepage has all the project info.

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 the wiki
    • Update the Speex manual based on recent papers
    • Improve libspeex documentation
    • Write good example code

External links

Retrieved from "https://wiki.xiph.org/index.php?title=Speex&oldid=5506"