Method and system for providing short block length low density parity check (ldpc) codes in support of broadband satellite applications
CA 2685463 C · Owner: Dtvg Licensing, Inc. · Inventors: Lee, Lin-Nan; Sun, Feng-Wen; Eroz, Mustafa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An approach is provided for encoding short frame length Low Density Parity Check (LDPC) codes. An encoder (203) generates a LDPC code having an outer Bose Chaudhuri Hocquenghem (BCH) code. Structure is imposed on the LDPC codes by restricting portion part of the parity check matrix to be lower triangular and/or satisfying other requirements such that the communication between bit nodes and check nodes of the decoder (305) is simplified. Further a cyclic redundancy check (CRC) encoder (209) is supplied to encode the input signal according to a CRC code. This approach has particular application in digital video broadcast services over satellite.
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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 September 3, 2004 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2026.
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