Method, apparatus and program for recording and playing back content data, method, apparatus and program for playing back content data, and method, apparatus and program for recording content data

A recording method for a recording apparatus to record content data including a content in a form that allows it to play back the content of the content data at a position specified by first relative time information indicating a relative time with respect to a start position of the content, the method comprising:

• recording the content data;
• generating, using reference time information, record start time information indicating time information associated with a record start position of the content data, wherein the record start position is a recording position indicating the start of the recorded content;
• generating a playback control table indicating, for a particular part of the content data, correspondence between second relative time information indicating a relative time with respect to the record start position of the content data and the amount of the content data as measured from the record start position;
• recording playback control information including content start time information indicating the content start position using the reference time information, the record start time information generated in the record start time information generation step, and the playback control table;
• and
• storing an associated data indicating a correspondence between the record start time information indicating time information associated with the record start position of the content data recorded by the first recording means, and the content start time information indicating the content start position using the reference time information, the record start time information, and the playback control table.

A recording apparatus for recording content data including a content in a form that allows it to play back the content of the content data at a position specified by first relative time information indicating a relative time with respect to a start position of the content, the recording apparatus comprising:

• a first recording unit configured to record the content data;
• a record start time information generation unit configured to generate, using reference time information, record start time information indicating time information associated with a record start position of the content data recorded by the first recording unit, wherein the record start position is a recording position indicating the start of the recorded content;
• a playback control table generation unit configured to generate a playback control table indicating, for a particular part of the content data recorded by the first recording unit, correspondence between second relative time information indicating a relative time with respect to the record start position of the content data and the amount of the content data as measured from the record start position;
• a second recording unit configured to record playback control information including content start time information indicating the content start position using the reference time information, the record start time information generated by the record start time information generation unit, and the playback control table generated by the playback control table generation unit;
• and
• a storage unit configured to store an associated data indicating a correspondence between the record start time information indicating time information associated with the record start position of the content data recorded by the first recording means, and the content start time information indicating the content start position using the reference time information, the record start time information, and the playback control table.