论文信息 - A comparison of algorithms for data base compression by use of fragments as language elements

A comparison of algorithms for data base compression by use of fragments as language elements

Abstract The paper describes the advantages of using variable length equifrequent fragments as the language elements for compression coding of large data bases. The problem of finding the minimum space representation of the fragment compressed data base is equivalent to solving a shortest path problem. Three alternate algorithms for compression are described and their performance is tested on both word and text fragments. It is found that text fragments selected by a longest match algorithm produce the best results with regard to compression and use of processing time.

H. S. Heaps | Ernst J. Schuegraf

[1] E. F. Moore,et al. Variable-length binary encodings , 1959 .

[2] Robert A. Wagner,et al. Binary Pattern Reconstruction from Projections [Z] (Algorithm 445) , 1973, Communications of the ACM.

[3] William R. Nugent,et al. AUTOMATIC WORD CODING TECHNIQUES FOR COMPUTER LANGUAGE PROCESSING. SAMPLE RESULTS OF COMPUTER TESTS , 1962 .

[4] J. J. Dimsdale,et al. File Structure for an On-Line Catalog of One Million Titles , 1973 .

[5] H. S. Heaps,et al. Selection of equifrequent word fragments for information retrieval , 1973, Inf. Storage Retr..

[6] D. Huffman. A Method for the Construction of Minimum-Redundancy Codes , 1952 .

[7] Michael F. Lynch,et al. The identification of variable-length, equifrequent character strings in a natural language data base , 1972, Comput. J..

[8] George Kingsley Zipf,et al. Human behavior and the principle of least effort , 1949 .

[9] H. S. Heaps. Storage Analysis Of A Compression Coding For Document Data Bases , 1972 .

[10] Larry H. Thiel,et al. Program design for retrospective searches on large data bases , 1972, Inf. Storage Retr..

[11] T. A. J. Nicholson,et al. Finding the Shortest Route between Two Points in a Network , 1966, Comput. J..

[12] Larry H. Thiel,et al. Optimum procedures for economic information retrieval , 1970, Inf. Storage Retr..