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// Example no 8.3
// To compute the minimum encoding rateof given 4 sub-band coder
// Page no. 427
clc;
clear all;
// Given data
N=4; // Total number of sub-bands
L1=225; // Lower limit of first sub-band
U1=450; // Lower limit of first sub-band
L2=450; // Lower limit of second sub-band
U2=900; // Lower limit of second sub-band
L3=1000; // Lower limit of third sub-band
U3=1500; // Lower limit of third sub-band
L4=1800; // Lower limit of fourth sub-band
U4=2700; // Lower limit of fourth sub-band
E1=4; // Encoding bit of first sub-band
E2=3; // Encoding bit of second sub-band
E3=2; // Encoding bit of third sub-band
E4=1; // Encoding bit of fourth sub-band
// Sampling rate of the sub-bands according to Nyquist theorem
sr1=2*(U1-L1); // Sampling rate of first sub-band in samples/second
sr2=2*(U2-L2); // Sampling rate of second sub-band in samples/second
sr3=2*(U3-L3); // Sampling rate of third sub-band in samples/second
sr4=2*(U4-L4); // Sampling rate of fourth sub-band in samples/second
// Total encoding rate
SR=sr1*E1+sr2*E2+sr3*E3+sr4*E4; // Total encoding rate in bps
// Displaying the result in command window
printf('\n Total encoding rate = %0.1f kbps',SR*10^-3);
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