المحاضرة السادسة : نظرية المعلومات

Lempel-Ziv LZ 78 COMPRESSION TECHNIQUES:
In 1978, Jacob Ziv and Abraham Lempel wrote an article entitled “ Compression of Individual Sequences via Variable Rate Coding” in the IEEE Transactions on Information Theory describing a compression algorithm known as the LZ 78 algorithm.
LZ78 inserts one- or multi-character, non-overlapping, distinct patterns of the message to be encoded in a Dictionary. The multi-character patterns are of the form: C0C1 . . . Cn-1Cn. The prefix of a pattern consists of all the pattern characters except the last: C0C1 . . . Cn-1 ,
Lempel-Ziv LZ 78 COMPRESSION TECHNIQUES:
In 1978, Jacob Ziv and Abraham Lempel wrote an article entitled “ Compression of Individual Sequences via Variable Rate Coding” in the IEEE Transactions on Information Theory describing a compression algorithm known as the LZ 78 algorithm.
LZ78 inserts one- or multi-character, non-overlapping, distinct patterns of the message to be encoded in a Dictionary. The multi-character patterns are of the form: C0C1 . . . Cn-1Cn. The prefix of a pattern consists of all the pattern characters except the last: C0C1 . . . Cn-1 ,