FIELD: information technology.
SUBSTANCE: recording medium has a user data area and a control information area. Control information includes a space bitmap and a disc definition structure, which includes space bitmap location information. The size of the space bitmap is defined such that the combined size of the space bitmap itself and the disc definition structure is always equal to the size of one unit. If the size of the user data area in a predetermined recording layer exceeds a predetermined size, multiple space bitmaps are formed for the user data area of the predetermined recording layer.
EFFECT: arranging TDDS in a predetermined location for a disc with high density of recording on a layer.
40 cl, 30 dwg
Authors
Dates
2014-01-10—Published
2009-12-25—Filed