Data decompression with extra precision

Details Data decompression with extra precision Data decompression with extra precision

2004-11-16

2011-12-13

Do, Chat C (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

08078656

ABSTRACT:
Methods and systems for decompressing data are described. The relative magnitudes of a first value and a second value are compared. The first value and the second value represent respective endpoints of a range of values. The first value and the second value each have N bits of precision. Either the first or second value is selected, based on the result of the comparison. The selected value is scaled to produce a third value having N+1 bits of precision. A specified bit value is appended as the least significant bit of the other (non-selected) value to produce a fourth value having N+1 bits of precision.

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Mark Adler, Gzappend, Nov. 4, 2003, http://svn.ghostscript.com/ghostscript/tags/zlib-1.2.3/examples/gzappend.c.

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