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US 5,969,647 AGranted
Method of compressing letters in a caller identification code system
AssigneeDBTEL Incorporated
InventorsMichael Mou, Yung-Cheng Lai
Life of this patent
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Abstract
A method of compressing letters adapted to store a letter in a specific bit and a memory unit includes compiling a set of 26 letters of the English alphabet and dividing it into two halves, which are respectively encoded as headers or tailers. Headers are stored in the specific bit, while tailers are stored in the memory unit, so as to reduce memory spaces. By using the method in combination with a speciaily designed data structure, 16 letters may be stored in 10 bits.
Claims6
A method of compressing letters adapted to store a letter which is included in a sign set, comprising the steps of:
- when the order of the letter exceeds a mean value of the sign set, setting a specific bit and setting the value of a memory unit as the order of the letter exceeding the mean value of the sign set;
- and
- when the order of the letter does not exceed the mean value of the sign set, resetting the specific bit and setting the value of the memory unit as the order of the letter;
- wherein the value of the memory unit is determined by the number of half of the letters in the sign set.
1 more element
Dependencies are inferred from the claim text.