Patent ID: 8295134

Claim:
An optical disc recording method, wherein a frame is configured by adding a synchronization signal to each predetermined data unit, and frame data modulated according to a modulation rule, which limits the run length to cause frame data to have a maximum run and a minimum run, is recorded on an optical disc by a laser beam, comprising a step of: reading, from the optical disc, identification information indicating whether the optical disc is a disc to be recorded with a first synchronization signal added or a disc to be recorded with a second synchronization signal added, wherein: the identification information is information for identifying that a different synchronization signal is added according to the same modulation rule; a pattern of the first synchronization signal is composed of a repetition pattern of a first pattern that breaks the maximum run subsequent to the minimum run; a pattern of the second synchronization signal is composed of a pattern at both ends of a second pattern that breaks the maximum run; the pattern of the first synchronization signal and the pattern of the second synchronization signal have the same length; and the laser beam is used to record with the first synchronization signal added or to record with the second synchronization signal added according the identification information.