Optical disc, recording apparatus, reproducing apparatus, program, computer-readable recording medium, recording method and reproducing method

A recording method comprising:

• receiving, using a receive unit, at least one reproduction section of digital stream including a plurality of pictures, the digital stream being recorded on a recording medium;
• generating, when at least two pieces of the reproduction section are received, a duplicated part by duplicating an end vicinity of the digital stream corresponding to a preceding reproduction section and a beginning vicinity of the digital stream corresponding to a subsequent reproduction section, the preceding reproduction section and the subsequent reproduction section being of the two pieces of the reproduction section;
• and
• writing the generated duplicated part and a flag,
• wherein
• the duplicated part is modified to connect the end vicinity and the beginning vicinity seamlessly,
• the flag indicates whether to reproduce a part before the end vicinity and a part after the beginning vicinity via the duplicated part, or to reproduce the digital stream corresponding to the preceding reproduction section and the digital stream corresponding to the subsequent reproduction section without reproducing the duplicated part, and
• the end vicinity and the beginning vicinity, which have been duplicated for generating the duplicated part, each include both (i) one or more duplicated pictures without modification and (ii) one or more duplicated pictures with modification.

A non-transitory recording medium comprising:

• digital stream including a plurality of pictures;
• a duplicated part;
• and
• a flag,
• wherein
• the duplicated part is obtained by duplicating an end vicinity of the digital stream corresponding to a preceding reproduction section and a beginning vicinity of the digital stream corresponding to a subsequent reproduction section, and is modified to connect the end vicinity and the beginning vicinity seamlessly,
• the flag indicates whether to reproduce a part before the end vicinity and a part after the beginning vicinity via the duplicated part, or to reproduce the digital stream corresponding to the preceding reproduction section and the digital stream corresponding to the subsequent reproduction section without reproducing the duplicated part, and
• the end vicinity and the beginning vicinity, which have been duplicated for generating the duplicated part, each include both (i) one or more duplicated pictures without modification and (ii) one or more duplicated pictures with modification.

A reproducing apparatus comprising:

• a read out unit configured to read out, from a recording medium, digital stream including a plurality of pictures, a duplicated part and a flag indicating on or off,
• the duplicated part being obtained by duplicating an end vicinity of the digital stream corresponding to a preceding reproduction section and a beginning vicinity of the digital stream corresponding to a subsequent reproduction section, and being modified to connect the end vicinity and the beginning vicinity seamlessly, and
• the end vicinity and the beginning vicinity, which have been duplicated for generating the duplicated part, each include both (i) one or more duplicated pictures without modification and (ii) one or more duplicated pictures with modification;
• and
• a reproduce unit configured to reproduce,
• a part before the end vicinity and a part after the beginning vicinity via the duplicated part when the flag indicates on, and
• the digital stream corresponding to the preceding reproduction section and the digital stream corresponding to the subsequent reproduction section without reproducing the duplicated part when the flag indicates off.

A reproducing method comprising:

• reading out, from a recording medium, digital stream including a plurality of pictures, a duplicated part and a flag indicating on or off,
• the duplicated part being obtained by duplicating an end vicinity of the digital stream corresponding to a preceding reproduction section and a beginning vicinity of the digital stream corresponding to a subsequent reproduction section, and being modified to connect the end vicinity and the beginning vicinity seamlessly, and
• the end vicinity and the beginning vicinity, which have been duplicated for generating the duplicated part, each include both (i) one or more duplicated pictures without modification and (ii) one or more duplicated pictures with modification;
• and
• reproducing, using a reproduce unit,
• a part before the end vicinity and a part after the beginning vicinity via the duplicated part when the flag indicates on, and
• the digital stream corresponding to the preceding reproduction section and the digital stream corresponding to the subsequent reproduction section without reproducing the duplicated part when the flag indicates off.