Patent Document ID: 7724164
Application ID: 11626522

Base Claim:
1. An apparatus usable in a text image coding and decoding system, comprising: a decomposer to decompose image data to extract a stripe image having one or more symbols; a matching unit to match the symbols with reference symbols of a symbol dictionary; a dynamic symbol caching unit to generate one or more new symbols when the one or more new symbols of the symbols are not included in the symbol dictionary, and to remove the least used one or more of the reference symbols, so that the symbol dictionary is updated as an updated symbol dictionary with the one or more new symbols and without the least used one or more reference symbols.

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Claim 14:
14. The apparatus of claim 1 , wherein: the stripe image comprises a plurality of stripe images; and the updated symbol dictionary comprises a plurality of updated symbol dictionaries to correspond to the respective updated symbol dictionaries.