Course: Multimedia Please solve these two issues completely

11. Suppose we mistakenly always use the 0.75 point instead of the 0.50 point in a quantization interval as the decision point, in deciding to which quantization level an analog value should be mapped. Above, we have a rough calculation of SQNR. What effect does this mistake have on the SQNR?

12. State the Nyquist frequency for the following digital sample intervals. Express the result in Hertz in each case. (a) 1 millisecond, (b) 0.005 s, and (c) 1 h.