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:
May. 17, 2005
Filed:
Mar. 20, 2002
Applicant:
Adolf Dsouza, Westfield, IN (US);
Inventor:
Adolf DSouza, Westfield, IN (US);
Assignee:
Thomas Licensing S.A., Boulogne-Billancourt, FR;
Primary Examiner:
Int. Cl.
CPC ...
H04N005/21 ;
U.S. Cl.
CPC ...
Abstract
A method and apparatus for equalizing a signal containing high definition television information in the presence of co-channel NTSC interference employs an equalizer having feed forward and decision feedback filters. A comb filter is inserted ahead of the equalizer when NTSC co-channel interference is present. A selected tap of the decision feedback filter is set to a zero value when the signal is being equalized during an intitial blind operating mode. The decision feedback filter taps are updated afterwards, in a decision-directed operating mode.