RECORDING MEDIUM, RECORDING DEVICE, REPRODUCING DEVICE, RECORDING METHOD, AND REPRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To improve the usefulness of a recording medium of a write-once type of a plurality of recording layers. SOLUTION: The write-once type recording medium having a plurality of recording layers consists of: a normal recording and reproducing region, an alternate region, a first alternation control information region; and a second alternation control information region (TDMA). Further, write presence/absence presentation information (space bit map) is recorded. For example, the write presence/absence presentation information is recorded in the second alternation control information region. The second alternation control information region is a region in which rewrite of alternation control information is realized by additional write of alternation control information relating to alternation processing. Further it can be discriminated whether write has been performed already for each data unit (cluster) of each recording layer on the recording medium. The second alternation control information region (TDMA) of each recording layer is erased sequentially, and is used for updating alternation control information and write presence/absence presentation information. COPYRIGHT: (C)2005,JPO&NCIPI