Recording medium and producing method thereof, reproducing method and reproducing apparatus, and copyright managing method

A recording medium producing method for producing a recording medium on which data of a video content is recorded, the method comprising the steps of:

• editing the data of the video content;
• embedding title information that represents a title of the video content or a title message necessary for assuring the trueness of the title information as electronic watermark information in data of the video content;
• and
• recording the title information or the title message in other than a recording area for the data of the video content.

A reproducing method for a recording medium on which data of a video content is recorded, title information that represents a title of the video content or a title message necessary for assuring the trueness of the title information being embedded as electronic watermark information in data of the video content, the title information or the title message being recorded in other than a recording area for the data of the video content, the method comprising the steps of:

• detecting the title information or the title message recorded in other than the recording area for the data;
• detecting title information or a title message embedded as the electronic watermark information;
• determining whether or not the trueness of the title information or the title message detected at the first and second title information detecting steps are assured;
• and
• restricting a reproducing operation for the recording medium when the trueness has not been assured at the determining step.

A reproducing apparatus for a recording medium on which data of a video content is recorded, title information that represents a title of the video content or a title message necessary for assuring the trueness of the title information being embedded as electronic watermark information in data of the video content, the title information or the title message being recorded in other than a recording area for the data of the video content, the apparatus comprising:

• a first title information detecting portion for detecting the title information or the title message recorded in other than the recording area for the data;
• a second title information detecting portion for detecting title information or a title message embedded as the electronic watermark information;
• a determining portion for determining whether or not the trueness of the title information or the title message detected by the first and second title information detecting portions are assured;
• and
• a controlling portion for restricting a reproducing operation for the recording medium when the trueness has not been assured by the determining portion.