REAL TIME ALGORITHMS AND ARCHITECTURES FOR CODING IMAGES COMPRESSED BY DWT-BASED TECHNIQUES

摘要

What is disclosed is a method that allows a fixed length codeword and flag to serve as data format structure for encoding run-lengths. Large run-lengths use a sequence of these structures representing the number of zeroes between two non-zero values in a data set. An adaptive encoding technique that determines an encoding method suitable with the entropy characteristics of the data to be encoded is disclosed. An architecture is disclosed which allows the size of the fixed length to be varied, if needed. This architecture includes a plurality of logic networks (422, 424, 426, 432, 434, 436) coupled to a single counter (410) each of which may be enabled depending on the desired codeword size.