1
Willard L Eastman, Abraham Lempel, Jacob Ziv, Martin Cohn: Apparatus and method for compressing data signals and restoring the compressed data signals. Sperry Corporation, Howard P Terry, Albert B Cooper, August 7, 1984: US04464650 (230 worldwide citation)

A compressor parses the input data stream into segments where each segment comprises a prefix and the next symbol in the data stream following the prefix. The prefix of a segment is the longest match with a previously parsed segment of the data stream. The compressor constructs a search tree data ba ...


2
John J Vaccaro, Willard L Eastman, Thomas M Hopkinson: Programmable systolic BCH decoder. The Mitre Corporation, Choate Hall & Stewart, June 21, 1994: US05323402 (36 worldwide citation)

A programmable decoder that provides both error and erasure decoding for all Reed-Solomon, primitive BCH, non-primitive BCH, and binary BCH codes of any rate over any field is disclosed. The user can specify decoding parameters including the code block-length, the code-generator polynomial, and the ...


3
Willard L Eastman: Short-record data compression and decompression system. Unisys Corporation, Albert B Cooper, Mark T Starr, February 11, 1992: US05087913 (31 worldwide citation)

Short-data records are compressed and decompressed by Lempel-Ziv compression and decompression utilizing a fixed searchtree database, an encoder and a decoder. The searchtree database is incrementally grown by a file preprocessor from a sample of the input data. The searchtree is fixed either when t ...