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:
Dec. 30, 1997
Filed:
Dec. 23, 1994
Applicant:
Inventors:
Chris Heegard, Ithaca, NY (US);
Andrew J King, Phoenix, AZ (US);
Sydney Lovely, Phoenix, AZ (US);
Thomas J Kolze, Phoenix, AZ (US);
Assignee:
General Instrument Corporation of Delaware, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ; H04L / ;
U.S. Cl.
CPC ...
371 42 ;
Abstract
A method and apparatus are provided for achieving synchronization and detecting errors in a data stream such as an MPEG-2 transport packet stream. In an MPEG embodiment, the MPEG sync word is removed and replaced with a parity code that is used at the decoder for both synchronization and error detection. A syndrome calculator in the decoder can be implemented using a unique one bit in, one bit out FIR filter. Codewords used to generate the parity code can be provided by a linear block code that is a dual of a shortened cyclic code.