Patent ID: 6804188
Filing Date: 2004-10-12
Classification: G11B

Abstract:
A disk shaped recording medium in which information is recorded by a recording format based ona compact disk format, wherein said recording medium has a sub code area in which a sub code as additional information is to be recorded, said sub code area has a Q channel for recording address information which shows a recording position of the information which is to be recorded on the disc shaped recording medium and includes absolute time information shown by each unit of â€œhourâ€ , â€œminuteâ€ , â€œsecondâ€ , and â€œframeâ€ , and said Q channel is defined based on said compact disk format and a zero data area in said Q channel has an AHOUR area in which time information shown by the â€œhourâ€  unit in said absolute time information is to be recorded.