35. The apparatus of claim 34 wherein said received transmission block additionally includes an error detecting word, and further comprising error detecting means responsive to said error detecting word and to the words in said odd and even sub-blocks to detect if said latter words are erroneous.
35. The apparatus of claim 34 wherein said received transmission block additionally includes an error detecting word, and further comprising error detecting means responsive to said error detecting word and to the words in said odd and even sub-blocks to detect if said latter words are erroneous. 37. The apparatus of claim 35 wherein each received odd and even sub-block is comprised of plural information words and at least one error-correcting word, said plural information and error-correcting words being interleaved with each other; and wherein each of said odd and even error-correcting decoding means comprises de-interleave means for de-interleaving the plural information and error-correcting words in the respective sub-block, and decoding means for using the de-interleaved at least one error-correcting word to correct erroneous information words.