From XiphWiki

Revision as of 13:23, 20 August 2005 (view source) Andrel (Talk | contribs) m (rm spam) ← Older edit		Revision as of 21:31, 10 October 2011 (view source) Gmaxwell (Talk | contribs) m (Reverted edits by VTowery39 (talk) to last revision by J^) Newer edit →
(20 intermediate revisions not shown)
Line 1:		Line 1:
-	== About ==	+	= Website =
-	The Speex project maintains a patent-clear audio codec designed for compressing speech data.	+	The [http://www.speex.org/ Speex homepage] has all the project info.
		+
		+	== Hardware ==
		+
		+	See [[Speex hardware]] for a partial list of supported hardware
		+
		+	== Tasks ==
		+
		+	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.
		+
		+	* 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 ==		== External links ==
-	[http://www.speex.org Speex homepage]	+	* [[Wikipedia: Speex]]
		+
		+	[[Category:Speex]]

---

Revision as of 21:31, 10 October 2011

Contents 1 Website 1.1 Hardware 1.2 Tasks 1.3 External links

Website

The Speex homepage has all the project info.

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

External links

• Wikipedia: Speex