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?