Patent ID: 7701829

Claim:
An information storage medium for use with a recording and/or reproducing apparatus, the information storage medium comprising: a plurality of data areas each comprising a plurality of data frames, each of the data frames comprising corresponding sync data of a plurality of sync data; and an additional data area located between two of the data areas and comprising: a first additional data frame comprising first sync data; and a second additional data frame comprising second sync data; wherein: the first sync data is different from the second sync data; the first sync data is different from each of the plurality of sync data of the data frames; the second sync data is different from each of the plurality of sync data of the data frames; the first sync data and the second sync data enable the apparatus to identify the additional data area from the data areas when the information storage medium is used with the apparatus; and the additional data area provides compatibility among information storage media having different formats for use with the apparatus.