July 2018
Beginner
202 pages
5h 4m
English
Content preview from Beginning Java Data Structures and Algorithms
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Building a Huffman Code
Before we start studying an algorithm to solve this problem, we should introduce something called prefix codes. Prefix codes are codes in which no code word is also a prefix of some other code word. As you have seen from the proposed variable-length code, we must make sure that no code word is also a prefix of some other code word, since we want to concatenate on code words and unambiguously be able to decode it afterwards.
For example, using the code shown previously, we encode the string abc as 0101100. Since no code word is a prefix of any other, decoding is vastly simplified, as we can identify the initial code word, translate it, and repeat the process on the remainder of the encoded sequence.
A convenient (for ...
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