Digital transmission system for encoding and decoding in error checking symbols of main data qualities data

摘要

(57) The [Abstract] data, it is encoded by an error correction code of the first, to generate coded bits first. Is encoded using the error correction code to the second with a large redundancy, control data is added modulo 2 to the coded bits first. and performs decoding by (when added to the code words received) whether a valid code word which second to ascertain when the result is decoded according to the first code, and to give them the error count minimum .