Causal Systems and real time processing Systems that operate under real time con

Question

Causal Systems and real time processing
Systems that operate under real time conditions need to be causal – that is, they can only process present and past inputs. When no real time processing is needed the system can be non-causal.
a. Consider the case of averaging an input signal x[n] under real time conditions. Suppose you are given two different filters, y[n] = 1/N S( x[n-k]; N-1:k=0 and y[n] = 1/N S(x[n-k]) ;N -1:k = N+1 Which one of these would you use and why?
b. If you are given a tape with the data, which of these two filters would you use? Why? Would you use either? Explain

Explanation / Answer

hello a. 1st filter has to use, because 2nd one his processing future samples N+1 b. For taped data there is no concept of future data, because data being processing is old samples. Thanks, Raj.

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