Information processing device, information recording medium, and information processing method, and program

An information recording medium having content stored as record data therein,

• the content including an individual segment region configured with a plurality of pieces of variation data that include different identification information embedded therein and are decryptable using different keys and a common segment region configured with single data,
• a plurality of reproduction paths according to variation data to be selected being settable in the content,
• wherein each piece of the variation data is configured with segmented data in units of aligned units, and a variation data identifier is recorded in an adaptation field of a first source packet of each aligned unit as plain text data, and
• the information recording medium enables a reproducing device to select the aligned unit corresponding to the reproduction path on the basis of the variation data identifier recorded in the adaptation field in a TS packet header of the first source packet constituting the aligned unit and perform content reproduction.

An information processing method performed in an information processing device,

• the information processing device including a data processing unit that performs a process of reproducing content,
• the content including an individual segment region configured with a plurality of pieces of variation data that include different identification information embedded therein and are decryptable using different keys and a common segment region configured with single data,
• each piece of the variation data being configured with segmented data in units of aligned units, the information processing method comprising:
• calculating, by the data processing unit, a reproduction path by applying a device key held in a memory;
• performing, by the data processing unit, a process of sequentially selecting an aligned unit corresponding to one piece of variation data corresponding to the reproduction path from a plurality of aligned units constituting a plurality of pieces of variation data in the individual segment region and reproducing the selected aligned unit;
• and
• selecting, by the data processing unit, the aligned unit corresponding to the reproduction path on the basis of a variation data identifier recorded in an adaptation field in a TS packet header of a first source packet constituting the aligned unit.

An information processing method performed in an information processing device,

• the information processing device including a data processing unit that performs a content generation process, the information processing method comprising:
• generating, by the data processing unit, content in which an individual segment region including a plurality of pieces of variation data which include different identification information embedded therein and are decryptable using different keys and a common segment region including single data are provided, and a plurality of reproduction paths according to variation data to be selected is settable;
• and
• generating, by the data processing unit, content in which each piece of variation data is configured with segmented data in units of aligned units, and a variation data identifier is recorded in an adaptation field of a first source packet of each aligned unit as plain text data.

A program causing an information processing device to perform information processing,

• the information processing device including a data processing unit that performs a process of reproducing content,
• the content including an individual segment region configured with a plurality of pieces of variation data that include different identification information embedded therein and are decryptable using different keys and a common segment region configured with single data,
• each piece of the variation data being configured with segmented data in units of aligned units,
• the program causing the information processing device to perform:
• a process of calculating, by the data processing unit, a reproduction path by applying a device key held in a memory;
• a process of performing, by the data processing unit, a process of sequentially selecting an aligned unit corresponding to one piece of variation data corresponding to the reproduction path from a plurality of aligned units constituting a plurality of pieces of variation data in the individual segment region and reproducing the selected aligned unit;
• and
• a process of selecting, by the data processing unit, the aligned unit corresponding to the reproduction path on the basis of a variation data identifier recorded in an adaptation field in a TS packet header of a first source packet constituting the aligned unit.

A program causing an information processing device to perform information processing,

• the information processing device including a data processing unit that performs a content generation process,
• the program causing the information processing device to perform:
• generating, by the data processing unit, content in which an individual segment region including a plurality of pieces of variation data which include different identification information embedded therein and are decryptable using different keys and a common segment region including single data are provided, and a plurality of reproduction paths according to variation data to be selected is settable;
• and
• generating, by the data processing unit, content in which each piece of variation data is configured with segmented data in units of aligned units, and a variation data identifier is recorded in an adaptation field of a first source packet of each aligned unit as plain text data.