Question: Multimedia Processing: 1.1. A source emits letters from an alphabet A = {a 1 ,a 2 ,a 3 } with probabilities P(a 1 ) =

Multimedia Processing:

1.1. A source emits letters from an alphabet A = {a1,a2,a3} with probabilities P(a1) = 1/2, P(a2) = 1/4, P(a3) = 1/4. Calculate the entropy of this source.

1.2. Assume we encode the message [c a b c], where our alphabet consists of the first 4 lower case letters of the English alphabet. Show Adaptive Huffman trees for coding and the Adaptive Huffman code for [c a b c].

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