Optical disc, recording apparatus, and computer-readable recording medium

A recording apparatus for recording video data onto an optical disc, comprising:

• an input unit operable to receive input video data to be recorded;
• a compressing unit operable to compress the input video data and generate a video object containing a plurality of data units, each of which contains at least one picture;
• a writing unit operable to write data onto the optical disc;
• and
• a control unit operable to control the writing unit, wherein
• the control unit
• (a) controls the writing unit to write the video object onto the data area of the optical disc,
• (b) generates a table showing recording addresses of data units, the addresses corresponding to a plurality of reproduction times that belong to a period during which the video object is reproduced, each of the data units containing a picture to be reproduced at a corresponding one of the plurality of reproduction times,
• (c) calculates and stores, into the table, difference times, each of which corresponds to one of the plurality of reproduction times shown in the table and is a difference between the one of the plurality of reproduction times and a reproduction time of the first picture of a data unit that includes a picture to be reproduced at the one of the plurality of reproduction times, and
• (d) controls the writing unit to write the table into the time map area of the optical disc.

A recording method for use in a recording apparatus for recording onto an optical disc a video object containing a plurality of data units, each of which contains at least one picture, the recording method comprising the steps of:

• writing data onto a data area of the optical disc;
• generating a table showing recording addresses of data units, the addresses corresponding to a plurality of reproduction times that belong to a period during which the video object is reproduced, each of the data units containing a picture to be reproduced at a corresponding one of the plurality of reproduction times;
• and
• writing the table onto a time map area of the optical disc, wherein the table generating step includes
• a sub-step of calculating and storing, into the table, difference times, each of which corresponds to one of the plurality of reproduction times shown in the table and is a difference between the one of the plurality of reproduction times and a reproduction time of the first picture of a data unit that includes a picture to be reproduced at the one of the plurality of reproduction times.

A computer-readable recording medium recording a program for use in a recording apparatus for recording onto an optical disc a video object containing a plurality of data units, each of which contains at least one picture, the program allowing a computer to execute the steps of:

• writing the video object onto a data area of the optical disc;
• generating a table showing recording addresses of data units, the addresses corresponding to a plurality of reproduction times that belong to a period during which the video object is reproduced, each of the data units containing a picture to be reproduced at a corresponding one of the plurality of reproduction times;
• and
• writing the table onto a time map area of the optical disc, wherein the table generating step includes
• a sub-step of calculating and storing, into the table, difference times, each of which corresponds to one of the plurality of reproduction times shown in the table and is a difference between the one of the plurality of reproduction times and a reproduction time of the first picture of a data unit that includes a picture to be reproduced at the one of the plurality of reproduction times.