摘要:
An information record medium is provided which comprises a substrate having an information record surface, and an information record track for recording record information. The information record medium further comprises a guide track for guiding a light beam to the information record track and a control information recorded as pre-pits on the guide track. The control information comprises synchronization pre-information and data pre-information. The synchronization pre-information comprises EVEN synchronization pre-information corresponding to EVEN synchronization frames to be recorded on the information record track and ODD synchronization pre-information having different patterns from the EVEN synchronization pre-information and corresponding to ODD synchronization frames to be recorded on the information record track.
摘要:
By the control information recording method, control information (S R ) to control at least one of recording and reproducing operations of record information (S D ) on an information record medium (27, 28) is recorded onto a guide track (3) of the information record medium. The control information recording method is provided with the steps of: generating a control information timing signal (S E , SO) one after another at an interval corresponding to a length of a control information unit equal to an N (N: predetermined integer not less than 2) multiple of a length of a record information unit (FRAME) of the record information; and recording the control information (S R ) onto the guide track of the information record medium (27, 28), on the basis of a timing corresponding to the control information timing signal.
摘要:
An information record medium is provided which comprises a substrate having an information record surface, and an information record track for recording record information. The information record medium further comprises a guide track for guiding a light beam to the information record track and a control information recorded as pre-pits on the guide track. The control information comprises synchronization pre-information and data pre-information. The synchronization pre-information comprises EVEN synchronization pre-information corresponding to EVEN synchronization frames to be recorded on the information record track and ODD synchronization pre-information having different patterns from the EVEN synchronization pre-information and corresponding to ODD synchronization frames to be recorded on the information record track.