Data compression by multi-order differencing

Details Data compression by multi-order differencing Data compression by multi-order differencing

2010-03-05

2011-10-04

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Adaptive coding

C341S076000

Reexamination Certificate

active

08031089

ABSTRACT:
Embodiments of the present invention enable compression and decompression of data. Applications of the present invention are its use in embodiments of systems for compression and decompression of GPS long-term Ephemeris (LTE) data, although the present invention is not limited to such applications. In embodiments, the LTE data may be grouped into a set of data values associated with a parameter. In embodiments, a data set may be compressed by using a multi-order differencing scheme. In such a scheme, a set of the differences between values may be compressed because the differences have smaller magnitudes than the values. In embodiments, a multi-order differencing scheme determines how many levels (orders) of differencing may be applied to an original data set before it is compressed. In embodiments, the original data may be recovered from a compressed data set based on the type of multi-order differencing scheme used to generate the compressed data.

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