| 摘要 |
A method and appratus are provided for communicating a sequence of digital information words. The information words are separated into a sequence of odd information words and a sequence of even information words. The separated odd and even information words are time-displaced from each other by a predetermined amount. The odd information words are encoded in an error-correcting code, and the even information words are separately encoded in a similar error-correcting code. The encoded time-displaced odd and even information words are combined into a transmission block, and this transmission block is transmitted or recorded. In one embodiment, the information words are encoded by generating an error-correcting word in response to the odd information words and by generating an error-correcting word in response to the even information words. The respective error-correcting words are interleaved with the odd and even information words. To recover the original information words, the transmission block is received and the odd and even information words are decoded so as to correct errors therein. The time displacement between the decoded off and even information words are removed. If an information word contains an uncorrected error therein, a correct information word is approximated therefor by interpolating adjacent decoded odd or even information words so as to approximate a correct even or odd information word, respectively. A corrected sequence of information words formed of the decoded and approximated information words is recovered. |
