Image analysis – Image compression or coding – Shape – icon – or feature-based compression
Reexamination Certificate
2006-08-08
2006-08-08
Dang, Duy M. (Department: 2627)
Image analysis
Image compression or coding
Shape, icon, or feature-based compression
C382S238000, C382S246000
Reexamination Certificate
active
07088868
ABSTRACT:
In a compression and decompression coding method, arrangement and computer program product, a data signal containing a number of symbols is converted into a series of codewords. A set of codewords is established and the data signal is monitored to determine the most frequently occurring symbols therein and/or sequences of symbols therein containing at least two symbols. A codeword is then allocated to each of the most frequently occurring of the symbols and/or symbol sequences. At least one codeword is reserved for indicating uncompressed data. When compressing a signal, the incoming symbols are first checked to determine if they correspond to a codeword. If a symbol corresponds to more than one codeword, further symbols are read until a symbol occurs which corresponds to one codeword only. That codeword is then transmitted. Any symbol that does not correspond to a codeword is supplemented with a codeword indicative of no compression and is then transmitted.
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Dang Duy M.
St. Jude Medical AB
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