Patent Document ID: 6047298
Application ID: 08791392
Patent Status: 1

Claim One:
1. A text compression dictionary generation apparatus, comprising: a calculation unit for calculating, with respect to a target compression rate, a frequency guideline for each character string having a length of at least two characters, required to occur in the text to meet said target compression rate, a cutout unit for cutting out a character string from the text having a length of at least two characters which occurs at a frequency matching the corresponding frequency guideline of a character string, together with the actual frequency in a descending order of length of the character string to generate a first static dictionary, while simultaneously generating a group of remaining text not cut out and not matching said frequency guideline, an extraction unit for counting a frequency of each character of one character string length from the group of remaining text to generate a second static dictionary, and a dictionary build up unit for adding the second static dictionary to the first static dictionary to generate an eventual static dictionary.