Coding Redundancy Different coding methods yield different amount of data needed to represent the same information. Example of Coding Redundancy Variable Length Coding vs.Fixed Length Coding Tk Pr(rk) Code 1 11(rk) Code2 12(Tk) T87=87 0.25 01010111 8 01 2 7128=128 0.47 10000000 8 1 7186=186 0.25 11000100 8 000 3 255=255 0.03 11111111 8 001 3 rk for k≠87,128,186,255 0 一 8 0 Lav8 bits/symbol Lavg 1.81 bits/symbol Concept:assign the longest code word to the symbol with the least probability of occurrence.Coding Redundancy Different coding methods yield different amount of data needed to represent the same information. Example of Coding Redundancy : Variable Length Coding vs. Fixed Length Coding Lavg 8 bits/symbol Lavg 1.81 bits/symbol Concept: assign the longest code word to the symbol with the least probability of occurrence