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 ...

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 ...

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 ...

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 ...

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.

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 ...

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 ...

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 ...

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 ...

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 ...