a)A signal source has four states A, B, C and D with probabilities of 0.4, 0.3, 0.2 and 0.1 respectively. Construct a Huffman code for this source, with a diagram showing the code reductions, and evaluate the efficiency of your code.
b)What is (i) run-length encoding and (ii) modified Huffman coding in the context of Group 3 fax? Why are these techniques on their own inadequate for the rapid fax transmission of documents?
A signal source has four states A, B, C and D with?
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