Coded data generation or conversion – Digital code to digital code converters
Patent
1995-08-02
1997-12-02
Gaffin, Jeffrey A.
Coded data generation or conversion
Digital code to digital code converters
382232, 3582612, 341 67, H03M 740, G11C 700
Patent
active
056941250
ABSTRACT:
A sliding window with big gap data compression system is simple to implement and gives good compression over a wide variety of bilevel images. A sliding window compressor with a very small window size is utilized in conjunction with a storage buffer which is large enough to hold at least an entire scan line of data symbols. Coupled to the storage buffer is circuitry that checks for a match between the incoming data symbol and a symbol stored in one specific programmable location. This programmable location is preferably exactly one scan line length away. Match locations are either within the range of the small window or exactly equal to the specific programmable location. The entire compressor can be viewed as a sliding window with a big gap (SWBG). This sliding window is of a length corresponding to the length of the scan line, comprised of the small window followed by a big gap and then the one specific programmable location, at the end of the scan line.
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Baker Kenneth J.
French Catherine A.
Owsley Patrick A.
Zweigle Greg C.
Advance Hardware Architecture
Gaffin Jeffrey A.
Jean Pierre Peguy
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