Optical recording apparatus and related method

An optical recording apparatus for recording a plurality of information units on an optical storage medium, each of the information units comprising a long run-length sync pattern, the optical recording apparatus comprising:

• a recording means for recording the plurality of information units on the optical storage medium;
• and
• a sync pattern selector, for determining the type of each of the long run-length sync patterns, wherein the sync pattern selector determines at least one long run-length sync pattern as a space when spaces with run-lengths longer than a length threshold do not appear for a time period longer than a time threshold.

A method used by an optical recording apparatus, the optical recording apparatus comprising a recording means for recording a plurality of information units on an optical storage medium, each of the information units comprising a long run-length sync pattern, the method comprising:

• determining a time period that marks with run-lengths longer than a length threshold do not appear;
• and
• if the time period that marks with run-lengths longer than the length threshold do not appear is longer than a time threshold, establishing at least one long run-length sync pattern as a mark.

A method used by an optical recording apparatus, the optical recording apparatus comprising a recording means for recording a plurality of information units on an optical storage medium, each of the information units comprising a long run-length sync pattern, the method comprising:

• determining a time period that spaces with run-lengths longer than a length threshold do not appear;
• and
• if the time period that spaces with run-lengths longer than the length threshold do not appear is longer than a time threshold, establishing at least one long run-length sync pattern as a space.