25. The apparatus of claim 23 wherein said odd and even error-correcting encoding means is formed of separate encoding means, each comprising error-correcting word generating means for generating at least one error-correcting word in response to the information words supplied thereto, and time delay means for selectively delaying the information and at least one error-correcting words to form a sub-block comprised of interleaved information and error-correcting words.
25. The apparatus of claim 23 wherein said odd and even error-correcting encoding means is formed of separate encoding means, each comprising error-correcting word generating means for generating at least one error-correcting word in response to the information words supplied thereto, and time delay means for selectively delaying the information and at least one error-correcting words to form a sub-block comprised of interleaved information and error-correcting words. 26. The apparatus of claim 25 wherein said error-correcting word generating means comprises a parity generator for generating a parity word.