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The Cartographer
Bidirectional Text Compression in External Memory
July 07, 2019 Β· Declared Dead Β· π Embedded Systems and Applications
"No code URL or promise found in abstract"
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Authors
Patrick Dinklage, Jonas Ellert, Johannes Fischer, Dominik KΓΆppl, Manuel Penschuck
arXiv ID
1907.03235
Category
cs.DS: Data Structures & Algorithms
Citations
4
Venue
Embedded Systems and Applications
Last Checked
4 months ago
Abstract
Bidirectional compression algorithms work by substituting repeated substrings by references that, unlike in the famous LZ77-scheme, can point to either direction. We present such an algorithm that is particularly suited for an external memory implementation. We evaluate it experimentally on large data sets of size up to 128 GiB (using only 16 GiB of RAM) and show that it is significantly faster than all known LZ77 compressors, while producing a roughly similar number of factors. We also introduce an external memory decompressor for texts compressed with any uni- or bidirectional compression scheme.
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