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Text File Compression

Adaptive Pattern Substitution:

Designed specifically for compressing text files.

Scans the entire text and looks for patterns of two or more bytes, substitutes a byte pattern and make a dictionary entry for it.

Effectiveness of the Adaptive Pattern Substitution depends on the content of the document.

Another type of compression scans and finds repeated words.

Occurrences of the word is substituted with number and it acts as a pointer to the original occurrence

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