In system and method for data compression and decompression, runs of the same bit value are identified within the data to be compressed and decompressed into a series of groups of bits wherein the number of bits in each group progressively increases as compared to the preceding groups until...http://www.google.com/patents/US5764167?utm_source=gb-gplus-sharePatent US5764167 - Compression and decompression of runs of ones and zeros in groups that progressively increase in size within each run 
