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

An information recording medium, comprising:

• circuitry configured to:
• store content as record data, wherein
• the content includes an individual segment region and a common segment region,
• the individual segment region includes a plurality of pieces of variation data that includes different identification information embedded therein,
• the plurality of pieces of variation data is decryptable based on different keys,
• the common segment region includes with single data, and
• store a plurality of reproduction paths settable based on selection of the plurality of pieces of variation data from the content, wherein
• each piece of the variation data of the plurality of pieces of variation data corresponds to 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
• enable a reproducing device to:
• select the aligned unit corresponding to a reproduction path of the plurality of reproduction paths based on the variation data identifier recorded in the adaptation field in a transport (TS) packet header of the first source packet constituting the aligned unit;
• and
• execute content reproduction.

An information processing device, comprising:

• a data processing unit configured to:
• generate content that includes an individual segment region and a common segment region, wherein
• the individual segment region includes a plurality of pieces of variation data which include different identification information embedded therein,
• the plurality of pieces of variation data is decryptable based on using different keys,
• the common segment region includes single data,
• a plurality of reproduction paths is settable based on a selection of the plurality of pieces of variation data from the content, and
• generated content that includes each piece of variation data that corresponds to 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.

An information processing method, comprising:

• in an information processing device:
• reproducing, by a data processing unit of the information processing device, content that includes an individual segment region and a common segment region, wherein
• the individual segment region includes a plurality of pieces of variation data that include different identification information embedded therein,
• the plurality of pieces of variation data is decryptable based on different keys, and
• each piece of the variation data of the plurality of pieces of variation data corresponds to segmented data in units of aligned units;
• calculating, by the data processing unit, a reproduction path by applying-a device key held in a memory;
• and
• sequentially selecting, by the data processing unit, an aligned unit, corresponding to one piece of variation data corresponding to the reproduction path, from a plurality of aligned units constituting the plurality of pieces of variation data in the individual segment region,
• wherein the aligned unit is selected based on a variation data identifier recorded in an adaptation field in a transport (TS) packet header of a first source packet constituting the aligned unit.

An information processing method, comprising:

• in an information processing device:
• generating, by a data processing unit of the information processing device, content that includes an individual segment region and a common segment region, wherein
• the individual segment region includes a plurality of pieces of variation data which include different identification information embedded therein,
• the plurality of pieces of variation data is decryptable based on different keys,
• the common segment region includes single data,
• a plurality of reproduction paths is settable based on selection of the plurality of pieces of variation data from the content, and
• the generated content includes each piece of variation data that corresponds to segmented data in units of aligned units, and a variation data identifier recorded in an adaptation field of a first source packet of each aligned unit as plain text data.

A non-transitory computer-readable medium having stored thereon, computer-executable instructions which, when executed by a computer, cause the computer to execute operations, the operations comprising:

• reproducing content that includes an individual segment region and a common segment region, wherein
• the individual segment region includes a plurality of pieces of variation data that includes different identification information embedded therein,
• the plurality of pieces of variation data is decryptable based on using different keys,
• the common segment region includes single data, and
• each piece of the variation data of the plurality of pieces of variation data corresponds to segmented data in units of aligned units;
• calculating a reproduction path by applying a device key held in a memory;
• sequentially selecting an aligned unit, corresponding to one piece of variation data corresponding to the reproduction path, from a plurality of aligned units constituting the plurality of pieces of variation data in the individual segment region,
• wherein the aligned unit is selected based on a variation data identifier recorded in an adaptation field in a transport (TS) packet header of a first source packet constituting the aligned unit;
• and
• reproducing the selected aligned unit.

A non-transitory computer-readable medium having stored thereon, computer-executable instructions which, when executed by a computer, cause the computer to execute operations, the operations comprising:

• generating content that includes an individual segment region and a common segment region, wherein
• the individual segment region includes a plurality of pieces of variation data which include different identification information embedded therein,
• the plurality of pieces of variation data is decryptable based on different keys,
• the common segment region includes single data,
• a plurality of reproduction paths is settable based on selection of the plurality of pieces of variation data, and
• wherein the generated content includes each piece of variation data that corresponds to segmented data in units of aligned units, and a variation data identifier recorded in an adaptation field of a first source packet of each aligned unit as plain text data.