Automatic spectral estimation

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Automatic spectral estimation

• Advanced digital signal processing final
  assignment
• Tom Jongsma s0066230

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Contents

• Explain what ARMASA toolbox can do
• Spectrum plots
• Filtered noisy speech fragment
• Questions

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ARMASA toolbox

• Can estimate three different models
• AR
• MA
• ARMA
• Generates a lot of time series
• Selects the best from all candidates with
  statistical rules

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Results of ARMAsel (AR)

• Good performance
• Filter order right guessed

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Results of ARMAsel (AR)
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Results of ARMAsel (MA)

• Good performance
• Filter order right guessed

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Results of ARMAsel (MA)
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Results of ARMASEL (ARMA)

• Not so good performance
• Difficult to guess right filter order

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Speech
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(No Transcript)
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Listen

• Original file
• File with noise
• File with noise filtered
• File with even more noise
• File with more noise filtered

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Questions?