Data compression system and method

Details Data compression system and method Data compression system and method

2007-05-29

2007-05-29

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

C341S050000

Reexamination Certificate

active

10539645

ABSTRACT:
The invention provides a method of compressing a data file comprising a sequence of bytes of a length greater than or equal to a predefined length, the method including the steps of: retrieving the data file from a secondary storage device; storing the data file in direct access memory; calculating the frequency of unique byte values within a sub-sequence of the data file, the sub-sequence having a length not exceeding the predefined length; creating an index for the sub-sequence, the index including a data value representing the calculated frequency of unique byte values within the sub-sequence; and on the sub-sequence having a frequency of unique byte values below a predetermined threshold, applying a data transformation to the sub-sequence to increase the frequency of unique byte values in the sub-sequence and adding to the index a data value representing the data transformation; on the sub-sequence having a frequency of unique byte values above a predefined threshold, adding to the index a data value representing the position of one or more unique values within the sub-sequence; creating an output data file, the data file having a file type identifier, and adding the index to the output data file.

REFERENCES:
patent: 6628717 (2003-09-01), Jeong et al.
patent: 6657565 (2003-12-01), Kampf
patent: 6868186 (2005-03-01), Sadeh
patent: 6961927 (2005-11-01), Erb et al.
patent: 2006174487 (2006-07-01), None
Lempel-Ziv (IEEE Transactions on Information Theory, vol. IT-23, No. 3, May 1977).

Affiliated with

Also associated with

Rating

Data compression system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data compression system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data compression system and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3787531