CiNii 図書 - Data compression : techniques and applications : hardware and software considerations

Building upon the second edition, this third edition represents an expansion of prior editions of this book. Information concerning the structure and operation of several popular compression algorithms that reached the market since the publication of the second edition of this book has been added. New compression techniques examined in this book include the Microcom Networking Protocol (MNP) Class 5 data compression, MNP Class 7 Enhanced Data Compression, and the CCITT V.42bis compression method based upon the Lempei-Ziv technique. In addition, numerous methods to enhance the efficiency of both character oriented and statistical compression techniques based upon the author's experience over the past three years are now shared with readers. Concerning character oriented compression, a new chapter has been added which discusses three methods readers can use to obtain the special compression indicating character which is the key to implementing this type of compression. Since the key to the successful implementation of character oriented compression techniques is the selection of an appropriate compression indicating character, Chapter 2 is focused upon this topic. Due to the relationship between compression indicating characters and data codes, Chapter 2 first reviews four popular data codes and then examines three methods readers can use to obtain compression indicating characters.

Part 1 Rationale and utilization: logical compression
physical compression
compression benefits
terminology
communications applications
data storage appliations
data compression and information transfer. Part 2 Data codes and compression-indicating characters: data codes
selecting compression indicating characters. Part 3 Data-compression techniques: null suppression
bit mapping
run length
half-byte packing
diatomic encoding
pattern substitution
relative encoding
forms mode operation. Part 4 Statistical encoding: information theory
Huffman coding
modified Huffman codes
Shannon-Fano coding
comma codes
adaptive compression
modern statistical compression methods. Part 5 System considerations and data analysis: system considerations
data analysis. Part 6 Software - linkage considerations: compression routine placement
timing considerations. Part 7 Using compression - performing hardware and software products: hardware products
software products. Appendix A - Datanalysis program descriptions and listings: FORTRAN program - operational description
main routine
program transferability
variable assignments
BASIC program - operational description
main routine
variable assignments
FORTRAN data analysis program listing
BASIC language DATANALYSIS program listing. Appendix B - shrink program descriptions and listings
MERGEC.BAS and MERGED.BAS, program operations.

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Data compression : techniques and applications : hardware and software considerations

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