Fault tolerant decoding method and apparatus

摘要: Units of forward error correction (FEC) encoded bits each represent a one-bit data value and include correctness that together reflect probability the represented by unit is correct. The units FEC are decoded using to perform soft-decision convolution decoding on bits. Block code symbols prone having been erroneously via identified determining whether convolutional decoder “changes its mind” as indicated trellis decode path change during such last state lowest cost after does not agree with penultimate immediately prior change. Such indicates input so corrupted be substantially unlikely correctly decoder. Distribution quality being below threshold level used an adjunct for if additional likely convolutionally decoded. Cost factor also taken into account further Among produced block decoding, tagged erasure subsequent decoding.