The present invention provides remarkably improved availability in a data recording method and apparatus, a data recording medium, and a data reproducing method and apparatus. By recording additional information for data reproduction in each sector on a data reproducing medium as a subcode separately...http://www.google.com.tw/patents/US6075920?utm_source=gb-gplus-share專利 US6075920 - Method and apparatus for recording/ reproducing data and subcode information onto/from a recording medium
