Ghost

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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).

Contents 1 Signal types 2 Signal analysis 2.1 Sinusoidal 2.2 Pitch 2.3 MDCT 2.4 Wavelets 2.5 LPC + stochastic cb

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