| 摘要 |
<p>It is possible to provide a data recording/reproducing system capable of decoding the original data with a high accuracy when an error has occurred in the reproduced data. In order to achieve this object, in the data recording/reproducing system, input data is added by a first error correction code to generate a first code block, the first code block is added by a second error correction code to generate a second code block, and the second code block is interleaved to generate a record block, so that recording and reproduction are performed via a partial response channel containing a recording medium. The system includes a repeated demodulation unit for repeatedly demodulating an output signal of the partial response channel so as to demodulate the second code block, a temporary decision/reliability detection unit for temporarily deciding the decoded data from the likelihood information of the mid flow of the repeated decoding in the repeated decoding unit and deciding reliability of the decoded data which has been decided temporarily, and a first error correction code decoding unit for decoding the first error correction code. The temporary decision/reliability detection unit supplies the decoded data which has been decided temporarily and the reliability information on the decoded data to the first error correction code decoding unit.</p> |
