In this paper a method is proposed for the determination of the correctable and detectable errors number, which ensures an optimum compromise between the incorrect decoding probability and the transmission rate. The method is based on the fact that by decreasing the correctable errors number and increasing the detectable errors number, both the incorrect decoding probability and transmission rate are reduced. Among the types of problems which can be solved by this method the most interesting is that of adapting the decoder to the transmission channel. In this paper the binary symmetrical channel is considered, but for other types of channels similar results can also be obtained.
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