Coding and decoding system using crc check bit
CA 2225574 C · Owner: Sato, Toshifumi · Inventors: Sato, Toshifumi; Dohi, Tomohiro; Fujiwara, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coding and decoding system which uses CRC check bits is disclosed. When a coding, apparatus performs coding, symbol interleaving is performed after coding by an outer code of, a concatenated code, and coding by an inner code is performed after CRC check bits are, added. Then, upon decoding by a decoding apparatus error detection using the , CRC check, bits is performed after decoding of the inner code. After symbol deinterleaving is performed, decoding of the outer code by erasure decoding or error correction is performed depending, upon the number of symbols included in a frame in which an error has been detected.
Read the whole patent
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 December 22, 1997 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.