A FRAME-BASED ANALYSIS IS ESSENTIAL

• Consider the problem of performing a piecewise linear analysis of a signal:
  
  
  
• This is most often implemented in hardware using a circular buffer.
  
  
• If we assume the signal is piecewise stationary, we can analyze the signal using a sliding window approach. Two key parameters are:
  
  
  • Frame Duration: how often we perform the analysis.
    
    
  • Window Duration: how many samples we use for the analysis.
  
  
• Recall we introduced similar parameters for the spectrogram. Typical values are a 10 ms frame duration and 25 ms window duration. Why?
  
  
• Important questions:
  
  
  • How does the window duration impact the spectral resolution?
    
    
  • Why so much overlap?
    
    
  • Why do we use a 10 ms frame duration?