Data compression/decompression and storage of compressed and unc

Details Data compression/decompression and storage of compressed and unc Data compression/decompression and storage of compressed and unc

1992-09-11

1995-02-28

Robertson, David L.

G06F 1202

Patent

active

053945344

ABSTRACT:
A data file having a plurality of data blocks is divided into one or more transfer units of data blocks. Before data storage, each transfer unit of data blocks is subjected to its own data compression cycle to create a group of compressed data blocks. The size of the data transfer unit, in bytes, is selected to facilitate addressing and retrieving individual recorded groups of compressed data blocks while providing good channel utilization and compression efficiency. Also the data transfer unit size is selected in part based upon data storage efficiency, i.e. the storage of the compressed data should fill as many addressable data storage areas as possible. Upon recording each group of compressed data bytes, an entry is made into a file directory for enabling addressing the recorded compressed data blocks.

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PKZIP-Compress Files Into Zip Files, pp. 15-26, Jul. 27, 1989, with file listing from a diskette having software copy of the manual.
Shah et al, Data Compressor Decompressor IC, 1990 IEEE International Symposium On Circuits And Systems, May 1-3, 1990 (New Orleans) pp. 41-43.

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