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- Yoshida Satoshi
- Graduate school of Information Science and Technology, Hokkaido University
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- Kida Takuya
- Graduate school of Information Science and Technology, Hokkaido University
Abstract
In this study, we address the problem of improving variable-length-to-fixed-length codes (VF codes). A VF code is an encoding scheme that uses a fixed-length code, which provides easy access to compressed data. However, conventional VF codes generally have an inferior compression ratio compared with variable-length codes. A method proposed by Uemura et al. in 2010 delivered a good compression ratio that was comparable with that of gzip, but it was very time consuming. In this study, we propose a new VF coding method that applies a fixed-length code to a set of rules extracted using the Re-Pair algorithm, which was proposed by Larsson and Moffat in 1999. The Re-Pair algorithm is a simple offline grammar-based compression method, which has good compression-ratio performance with moderate compression speed. We also present experimental results, which demonstrates that our proposed coding method is superior to the existing VF coding method.
Journal
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- IPSJ Online Transactions
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IPSJ Online Transactions 6 (0), 121-127, 2013
Information Processing Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205295606528
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- NII Article ID
- 130004516294
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- ISSN
- 18826660
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed