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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kulekci, M.O. |
| Copyright Year | 2013 |
| Description | Author affiliation: TUBITAK - BILGEM Nat. Res. Inst. of Electron. & Cryptology, Gebze, Turkey (Kulekci, M.O.) |
| Abstract | Unique decodability is the essential feature of any coding scheme, which is naturally provided by prefix-free codes satisfying the Kraft-McMillan inequality. Non-prefix-free codes have received much less attention due to the lack of an efficient method to support this property. In this study we introduce a novel technique that uses wavelet trees to bring unique decodability to non-prefix-free codes. Proposed method also provides direct access to the ith codeword, which can be extended to any variable-length coding scheme. The space overhead required for unique decoding is upper bounded by n·log q bits, where n is the number of symbols, and q is the number of distinct codeword lengths, which is normally expected to be a small number in non-prefix-free codes. Direct access is supported by using an additional o(n · log q) bits. We show that the overhead space requirement is much less than sampling methods using state-of-the-art compact integer representations. |
| Starting Page | 1969 |
| Ending Page | 1973 |
| File Size | 138060 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781479904464 |
| ISSN | 21578117 |
| DOI | 10.1109/ISIT.2013.6620570 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-07-07 |
| Publisher Place | Turkey |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Encoding Decoding Complexity theory Computer science Entropy Benchmark testing |
| Content Type | Text |
| Resource Type | Article |
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