1. Comments on a Paper by T.C. Chen and I.T. Ho.
- Author
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Smith, Alan Jay
- Subjects
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DATA compression , *BINARY-coded decimal system , *DATABASE management , *DATA transmission systems , *PERMUTATIONS , *LOGARITHMS , *DECIMAL system - Abstract
The article presents author's views on the research article "Storage-Efficient Representation of Decimal Data" by computer professionals Tien Chi Chen and Irving T. Ho related to compression of numbers stored in Binary Coded Decimal form. The research article indicates that data compression involves coding in two or three digits at a time in seven bit or ten bit fields and requires only permutations, deletions and insertions for coding and decoding. The article author says that variable length codes were rejected by Chen and Ho in their research analysis because they think it was difficult to decode, highly sensitive to errors, and have an uncertain storage requirement while variable length codes supports coding and decoding infinite number of memory. The author says that Huffman's coding system has two advantages. The first advantage is that it allows very rapid coding and decoding of the digits by using a algorithm table and the second advantage that it supersedes Chen and Ho's coding system in which a table of 6 entries rather than 128 entries for decoding and encoding.
- Published
- 1975
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