Recording medium, recording device, program, and recording method

A recording apparatus for writing a video stream and an entry map onto a non-transitory recording medium, the recording apparatus comprising:

• a detecting unit operable to detect an address of picture data in the video stream;
• a generating unit operable to generate entry information in accordance with a result of the detection by the detecting unit;
• and
• a writing unit operable to write an entry map including the generated entry information onto the recording medium in correspondence with the video stream, wherein
• if the detecting unit detects an address of picture data whose first field is an intra frame coding format and whose second field is an inter frame predictive coding format, the generating unit generates in the entry map, a piece of entry information indicating the address of picture data, and
• the generating unit does not generate, in the entry map, a piece of entry information indicating the address of picture data whose first field is the inter frame predictive coding format and whose second field is the intra frame coding format.

A program stored on a non-transitory recording medium for causing a computer to perform a process of writing a video stream and an entry map onto a non-transitory recording medium, the program causing the computer to perform:

• detecting an address of picture data in the video stream;
• generating entry information in accordance with a result of said detecting;
• and
• writing an entry map including the generated entry information onto the recording medium in correspondence with the video stream, wherein
• if said detecting detects an address of picture data whose first field is an intra frame coding format and whose second field is an inter frame predictive coding format, said generating generates, in the entry map, a piece of entry information indicating the address of picture data, and
• said generating does not generate, in the entry map, a piece of entry information indicating the address of picture data whose first field is the inter frame predictive coding format and whose second field is the intra frame coding format.

A recording method for writing a video stream and an entry map onto a non-transitory recording medium, the recording method comprising:

• detecting an address of picture data in the video stream;
• generating entry information in accordance with a result of said detecting;
• and
• writing an entry map including the generated entry information onto the recording medium in correspondence with the video stream, wherein
• if said detecting detects an address of picture data whose first field is an intra frame coding format and whose second field is an inter frame predictive coding format, said generating generates, in the entry map, a piece of entry information indicating the address of picture data, and
• said generating does not generate, in the entry map, a piece of entry information indicating the address of picture data whose first field is the inter frame predictive coding format and whose second field is the intra frame coding format.

A non-transitory recording medium on which a video stream and an entry map are recorded, wherein

• the video stream includes a plurality of pieces of picture data,
• the entry map includes a plurality of pieces of entry information
• the entry map includes entry information that indicates an address of picture data whose first field is an intra frame coding format and whose second field is an inter frame predictive coding format,
• the entry map does not include entry information that indicates an address of picture data whose first field is the inter frame predictive coding format and whose second field is the intra frame coding format, and
• the entry map recorded on the non-transitory recording medium is referenced by a playback apparatus for reading and playing back the picture data from the video stream recorded on the non-transitory recoding medium.

A playback apparatus for playing back a video stream recorded on a non-transitory recording medium, in accordance with an entry map recorded on the recording medium, wherein

• the entry map includes a plurality of pieces of entry information,
• each piece of entry information indicates an address of picture data,
• the entry map includes entry information that indicates an address of picture data whose first field is an intra frame coding format and whose second field is an inter frame predictive coding format,
• the entry map does not include entry information that indicates an address of picture data whose first field is the inter frame predictive coding format and whose second field is the intra frame coding format, and
• the playback apparatus reads picture data from the video stream recorded on the recording medium by referencing the entry map recorded on the recording medium, and plays back the picture data.

A playback method for playing back a video stream recorded on a non-transitory recording medium, in accordance with an entry map recorded on the recording medium, wherein

• the entry map includes a plurality of pieces of entry information,
• each piece of entry information indicates an address of picture data,
• the entry map includes entry information that indicates an address of picture data whose first field is an intra frame coding format and whose second field is an inter frame predictive coding format,
• the entry map does not include entry information that indicates an address of picture data whose first field is the inter frame predictive coding format and whose second field is the intra frame coding format, and
• the playback method reads picture data from the video stream recorded on the recording medium by referencing the entry map recorded on the recording medium, and plays back the picture data.