Variable rate transmission method, transmitter and receiver using the same
CA 2188455 C · Owner: Ntt Mobile Communications Network Inc. · Inventors: Adachi, Fumiyuki; Okumura, Yukihiko; Higashi, Akihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A variable rate transmission method that can vary the transmission rate of data. A transmitting side supplies a transmitted data sequence to an error detecting encoder 105 and a frame memory 103. The frame memory 103 stores data of a variable length to be transmitted in one frame. The error detecting encoder 105 calculates an error detecting code (such as CRC code) for each frame of the transmitted data. A multiplexer 104 adds the calculated error detecting code ahead of the transmitted data to place it at the initial position of the frame, and sequentially outputs the data sequence frame by frame. A receiving side calculates an error detecting code of the data in each transmitted frame in …
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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 February 23, 1996 and granted July 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2018.
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