Symbol decoding apparatus with plural data slicers and an adaptive ntsc co-channel interference filter
CA 2220740 C · Owner: Samsung Electronics Co. Ltd. · Inventors: Limberg, Allen Leroy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A first data slicer provides interim symbol decoding results responsive to multiple-level symbols in a digital television (DTV) receiver. Co-channel interference accompanying the multiple-level symbols is suppressed by using a first comb filter to reduce the energy of the co-channel interference before data slicing in a second data slicer. The first comb filter incidentally recodes the symbols supplied to the second data slicer. A second comb filter is used as a postcoder after the second data slicer re-coding the data stream recovered by the second data slicer to generate supplemental symbol decoding results. Co-channel interference detector circuitry determines the amounts of co-channel …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 10, 1997 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2019.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.