Patent ID: 7349302

Claim:
An optical disk recording apparatus, for recording a digital signal on a recordable optical disc, wherein either a first sync pattern recorded in a phase 1 or a second sync pattern recorded in a phase 2 is recorded at a position having a predetermined relationship in the phases thereof on a track wobbled at a constant cycle, comprising: a detection window producing means for said phase 1 ; a detection window producing means for said phase 2 ; a sync lock flag producing means for producing a sync lock flag indicative of a condition that synchronization is locked; and a recording timing producing means for producing a recording timing for recording the digital signal onto said optical disc, wherein said sync lock flag producing means produces the sync lock flag indicative of the condition that the synchronization is locked, when the first sync pattern is detected in the phase 1 or when the second sync pattern is detected in the phase 2 , while producing a sync lock flag indicative of a condition that the synchronization is unlocked, when the first sync pattern is detected in the phase 2 or when said second synch pattern is detected in said phase 1 , and said recording timing producing means conducts the synchronization on said sync pattern when the sync lock flags are detected, continuously, for a predetermined time period, indicating the condition that the synchronization is locked.