Difference between revisions of "Ghost"

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= Ghost =
 
 
This page is meant to track ideas about low-delay, high-quality audio coding. The work has just started, so don't expect anything in the near future (or at all for that matter).
 
This page is meant to track ideas about low-delay, high-quality audio coding. The work has just started, so don't expect anything in the near future (or at all for that matter).
  
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There are many signal types that can be found:
 
There are many signal types that can be found:
* Sinusoids (various tones)
+
* Sinusoids
* Periodic waveforms (e.g. voice)
+
** A few pure (or nearly pure) tones
* Noise
+
* Harmonic
 +
** Periodic waveforms (e.g. voice)
 +
** Many (sometimes closely spaced) harmonics
 +
* Shapred noise
 +
** Signals that are (or are indistinguishable) from filtered (coloured) white noise
 
* Transients
 
* Transients
 +
** Whatever does't fit above I guess
  
 
== Signal analysis ==
 
== Signal analysis ==
  
* Sinusoidal
+
=== Sinusoidal ===
* Pitch
+
=== Pitch ===
* MDCT
+
=== MDCT ===
* Wavelets
+
=== Wavelets ===
* LPC + stochastic cb
+
=== LPC + stochastic cb ===

Revision as of 16:01, 22 December 2005

This page is meant to track ideas about low-delay, high-quality audio coding. The work has just started, so don't expect anything in the near future (or at all for that matter).

Signal types

There are many signal types that can be found:

  • Sinusoids
    • A few pure (or nearly pure) tones
  • Harmonic
    • Periodic waveforms (e.g. voice)
    • Many (sometimes closely spaced) harmonics
  • Shapred noise
    • Signals that are (or are indistinguishable) from filtered (coloured) white noise
  • Transients
    • Whatever does't fit above I guess

Signal analysis

Sinusoidal

Pitch

MDCT

Wavelets

LPC + stochastic cb