Essay
Suppose we have 32 samples from a mono audio file.
(a) If the audio was sampled at , how many seconds does this represent?
(b) If we carry out a DCT with blocksize equal to 32, how many DCT coefficients do we end up with?
(c) Numbering the DCT coefficients from 0,
i) What frequency, in , does coefficient number 1 represent?
ii) What frequency, in , does coefficient number 16 represent?
Correct Answer:

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(a) 
(b) 32
(c) i)
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Correct Answer:
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(b) 32
(c) i)
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