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:
Sep. 16, 1997
Filed:
Apr. 26, 1995
James E Cannella, Jr, Roswell, GA (US);
Scientific-Atlanta, Inc., Norcross, GA (US);
Abstract
A data communications protocol for single path media having low data error rate requires the generation of a data packet with a start code field having a predetermined pattern, a byte count field for defining a data field having a maximum predetermined length in bytes, a data payload field having a byte count according to the value of the byte count field and a cyclic redundancy cheek field of predetermined length. The value of the byte count field may be fixed, may be changed from packet to packet or may be changed upon initialization. The described data communications protocol permits utilization with data types varying from high definition television to alarm reporting applications. Moreover, the data rate may be varied by varying an idle time signal duration up to a maximum (when the idle time signal duration is reduced to zero). According to one exemplary embodiment for plastic fiber optic media, MPEG2 transport stream packets may be transmitted at 54 MB and over distances of 20 meters or even more with other media.