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1992-11-04
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SHRI
======
xpkSHRI.library
Version 0.3 Beta Release
Copyright 1992 by Matthias Meixner
License/Disclaimer
------------------
This library may be freely distributed with the XPK compression
package, as long as it is kept in its original, complete, and unmodified
form. It may not be distributed by itself or in a commercial package of
any kind without my written permission.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
Description
-----------
SHRI is an XPK packer sublibrary which implements a highly for
compression rate optimized compressor, that uses offset/len encoding with
adaptive arithmetic aftercoding for best compression results. Its
compression rate is better than that of most other packers, e.g. lha,
zoo or powerpacker.
It supports 7 modes, which differ in the size of the dictionary:
(Speeds in Bytes/sec)
Modes Dictsize CF CSpd USpd
----- -------- -- ---- ----
0..14 1K 48.1% 8337 9124
15..28 2K 49.4% 8395 9224
29..42 4K 50.4% 8495 9521
43..56 8K 51.1% 8213 9732
57..70 16K 51.6% 7482 9976
71..84 32K 51.9% 6916 10195
85..100 64K 52.4% 6207 10364
Contact Address
---------------
Matthias Meixner
Sandberg 13
6417 Hofbieber 2
Germany
meixner@rbhp56.rbg.informatik.th-darmstadt.de