| 摘要 |
A data compression and decompression system based on the LZW data compressio n and decompression methodology that includes exclusion tables storing strings that are infrequently encountered. If an extended string formed for updating the compressor and decompressor dictionaries is included in the exclusion tables, the extended string is not stored and the code counter for assigning codes to dictionary strings is not advanced. In this manner, dictionary code s are not usurped by infrequently encountered strings.
|
