Consider the procedure described in Section 7.3 for estimating average delay di · Suppose that u = 0.1. Let r[ - II be the most recent sample delay, let r2 - f2 be the next most recent sample delay, and so on.
a. For a given audio application suppose four packets have arrived at the receiver with sample delays /"4 - f4, r3 - f3' r2 - f2, and r[ - II' Express the estimate of delay d in terms of the four samples.
b. Generalize your formula for n sample delays.
c. For the formula in Part b, let n approach infinity and give the resulting formula. Comment on why this averaging procedure is called an exponential moving average.