Module 2.4 – Fundamentals (Blocking)

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  • splitting the audio signal into blocks
  • terminology: block length & hop size

1. Given a signal with a sample rate of 20kHz, what is the block length in samples if a block is 20ms long?

 
 
 
 

2. Given a signal with a sample rate of 20kHz, blocked into chunks of 20ms, what is the hop size in ms if the overlap ratio is 25%?

 
 
 
 

3. Given a signal with a sample rate of 20kHz, a block length of 20ms, and an overlap ratio of 75%, what is the sample index of the first sample of the 2nd block (the first sample index is 0)?

 
 
 
 

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