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Patent Title: Method and apparatus for providing data stream for cost effective transmission links

Assignee: IBM
Patent Number: US5614901
Issue Date: 03-25-1997
Application Number:
File Date:06-21-1996


Abstract: A system and method for encoding and decoding binary data for serial transmission over a physical medium provides a highly efficient and less complex coding scheme while guaranteeing clocking information and guaranteeing an NRZ(I)-disparity of no greater than one per five-bit word. The system and method of the present invention comprise a 4/5 encoder which enables each nibble to be encoded and decoded independently from one another. The Coding system and method of the present invention guarantees an NRZ(I)-disparity having a magnitude of no greater than one for any word after NRZ(I) while providing at least one word with "NRZ(I) comma" property.

Notes:

Link to USPTO

IBM Pledge dated 1/11/2005