1
Peter A Franaszek, Albert X Widmer: Byte oriented DC balanced (0,4) 8B/10B partitioned block transmission code. International Business Machines Corporation, Roy R Schlemmer, December 4, 1984: US04486739 (406 worldwide citation)

A binary DC balanced code and an encoder circuit for effecting same is described, which translates an 8 bit byte of information into 10 binary digits for transmission over electromagnetic or optical transmission lines subject to timing and low frequency constraints. The significance of this code is ...


2
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 ...


3
Edward L Hauck: Data compression using run length encoding and statistical encoding. Intelligent Storage, Robert C Dorr, December 2, 1986: US04626829 (183 worldwide citation)

A compression device which uses both run length encoding and statistical encoding. The run length encoding scheme uses a flag byte symbol which is disposed between a character signal and a run length symbol. The statistical encoding process uses multiple statistical encoding tables which are selecte ...


4
John S Hoerning: Data compaction system and apparatus. Wicks & Nemer, May 3, 1977: US04021782 (109 worldwide citation)

A data compaction system and apparatus is disclosed which, in the preferred embodiment, includes a high speed compaction controller utilizing both read only storage and read-write storage. A compaction device according to the present invention could then be placed upon both ends of a transmission li ...


5
Glen G Langdon Jr, Jorma J Rissanen: Adaptive source modeling for data file compression within bounded memory. International Business Machines Corporation, R Bruce Brodie, January 15, 1985: US04494108 (96 worldwide citation)

A two-stage single pass adaptive modeling method and means for a finite alphabet first order MARKOV symbol source where the model is used to control an encoder on a per symbol basis thereby enabling efficient compression within a fixed preselected implementation complexity.


6
Steve Dobler, Christian Grund, Robert Fondiller: Solid state touch switch. December 13, 1977: US04063111 (81 worldwide citation)

A solid state touch switch is provided, in which, during use, a portion of the user's body, such as a finger, forms a portion of an electronic circuit to change the state of a solid state electronic device and thereby actuate the solid state touch switch. Alternative embodiments of the invention con ...


7
Roy L Adler, Martin Hassner, John P Moussouris: Method and apparatus for generating a noiseless sliding block code for a (1,7) channel with rate 2/3. International Business Machines Corporation, Roy R Schlemmer, November 1, 1983: US04413251 (74 worldwide citation)

An algorithm and the hardware embodiment for producing a run length limited code useful in magnetic recording channels are described. The system described produces sequences which have a minimum of 1 zero and a maximum of 7 zeros between adjacent 1's. The code is generated by a sequential scheme tha ...


8
Charles S Weaver, Robert A LeBlanc, Lawrence E Sweeney Jr: Data compression method and apparatus. Digital Recording Research Partnership, Victor R Beckman, October 8, 1985: US04546342 (73 worldwide citation)

A music data compression system is disclosed which includes an analog to digital converter for converting the analog music signal to digital sample signal form, a digital compression filter for compression filtering the digital sample signals, and an encoder for truncated Huffman encoding the compre ...


9
Thomas Edward Dechant, Edward Lewis Glaser, Paul Eldred Pitt, Frederick Way III: Information storage and retrieval system. Systems Development Corporation, Christie Parker & Hale, January 10, 1978: US04068298 (58 worldwide citation)

Data processing information storage and retrieval system having a memory. A number of modules are interconnected with the memory. Encode and decode modules operate in conjunction with the memory for compacting and expanding data. A revolve module in association with a delta module and a memory enabl ...


10
James R Hamstra, Robert K Moulton: Group coding system for serial data transmission. Sperry Corporation, Griffin Branigan & Butler, July 16, 1985: US04530088 (55 worldwide citation)

A run-length-limited group coding system is provided wherein the code permits a high data transfer efficiency. Code values for both data and control functions are chosen such that the maximum cumulative DC deviation from a nominal center is no more than 10 percent averaged over a data transmission s ...