To improve interchangeability and operability in using a recordable multi-layer disk.
A region for recording interlayer folding back position information is set on a recording medium (e.g., End sector number in Layer 0 or a session item type 3). In response to a fact that recording on a certain recording layer reaches a maximum recording range or that data recording advances from a certain recording layer to a next recording layer, interlayer folding back position information is recorded in the recording medium. When an advancement of the data recording to another recording layer is performed at a stage prior to disk closing or sector closing, or when it is predicted that such an advancement of the data recording occurs afterwards, the interlayer folding back position information is recorded. Also where the disk is of the type for which multi-session recording is performed, the interlayer return position information is recorded with regard to a session in which folding back is performed.
COPYRIGHT: (C)2009,JPO&INPIT
Yukio Shishido
Kawakami
| JP2004310972A |
Nobuo Suzuki