The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 07, 1995
Filed:
Feb. 19, 1993
Patricia A Thaler, Carmichael, CA (US);
Jonathan Jedwab, Bristol, GB;
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
Data to be communicated over a plurality of channels is divided into blocks (A1,B1,C1,D1,A2,B2, . . . ), and each successive block is transmitted along a different channel (A,B,C,D) on a cyclic basis. A 5-to-6 bit coding scheme is used with some data values having one possible encoding, with three binary ones, and the remainder having two possible encodings, one with two binary ones and the other with four binary ones. To maintain d.c. balance on each channel, two-ones and four-ones encodings are used alternately for successive occurrences on a channel of any data value having dual encodings. To assist detection of single-bit errors affecting the encoded data, a delimiter having one of two possible values is sent after the final block on each channel; this delimiter value is chosen in accordance with which encoding would have been selected if another dual-encoding data value had occurred on that channel.