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

A recording apparatus comprising:

• an input means operable to receive video data to be recorded on an optical disc;
• a compression means operable to compress the received video data to generate a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible;
• a write means operable to write the compressed video data onto the optical disc;
• and
• a controller operable to control the write means to write the generated video object onto a data area of the optical disc;
• generate a first table which includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time;
• generate the second table which includes, for each ofthe plurality of video object units, a reproduction time period and a data size of said video object unit, and a data size of the I-picture included in said video object unit;
• and control the write means to write the first table and the second table in a time map area of the optical disc.

A recording method for recording onto an optical disc a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible, the recording method comprising:

• writing the video object onto a data area of the optical disc;
• generating a first table which includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time;
• generating the second table which includes, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit, and a data size of the I-picture included in said video object unit;
• and
• writing the first table and the second table onto a time map area of the optical disc.

A reproduction apparatus for reproducing a video object stored on an optical disc which further stores a first table and a second table, the video object including a plurality of video object units each of which includes as a first picture an I-picture that is independently reproducible, the first table including, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time, the second table including, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture of said video object units, the reproduction apparatus comprising:

• a reading means operable to read the vide object from the optical disc;
• a reproduction means operable to reproduce the read video object;
• and
• a controller operable to control the reading means and the reproduction means, wherein the controller receives an instruction to perform a high-speed reproduction ofthe video object in which the video object is reproduced at a predetermined speed higher than that in a normal reproduction,
• determines a plurality of reproduction times based on the predetermined speed, controls the reading means to read the first table and the second table, identifies recording addresses of video object units respectively corresponding to the determined reproduction times and data sizes of I-pictures included in the respective identified video object units, and
• controls the reading means and the reproduction means to read and reproduce the identified I-pictures to realize the reproduction at the predetermined speed.

A reproduction method for reproducing a video object stored on an optical disc which further stores a first table and a second table, the video object including a plurality of video object units each of which includes as a first picture an I-picture that is independently reproducible, the first table including, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time, the second table including, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture of said video object units, the reproduction method comprising:

• receiving an instruction to perform a high-speed reproduction ofthe video object in which the video object is reproduced at a predetermined speed higher than that in a normal reproduction,
• determining a plurality of reproduction times based on the predetermined speed,
• controlling the reading means to read the first table and the second table,
• identifying recording addresses of video object units respectively corresponding to the determined reproduction times and data sizes of I-pictures included in the respective identified video object units,
• controlling the reading means and the reproduction means to read and reproduce the identified I-pictures to realize the reproduction at the predetermined speed.

A computer-readable recording medium storing a program for use in a recording apparatus for recording onto an optical disc a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible, the program allowing a computer to execute the steps of:

• writing the video object onto a data area of the optical disc;
• generating a first table which includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time;
• generating the second table which includes, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit, and a data size of the I-picture included in said video object unit;
• and
• writing the first table and the second table onto a time map area of the optical disc.

A computer-readable recording medium storing a program for use in a recording apparatus for reproducing a video object stored on an optical disc which further stores a first table and a second table, the video object including a plurality of video object units each of which includes as a first picture an I-picture that is independently reproducible, the first table including, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time, the second table including, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture of said video object units, the program allowing a computer to execute the steps of:

• receiving an instruction to perform a high-speed reproduction of the video object in which the video object is reproduced at a predetermined speed higher than that in a normal reproduction,
• determining a plurality of reproduction times based on the predetermined speed,
• controlling the reading means to read the first table and the second table,
• identifying recording addresses of video object units respectively corresponding to the determined reproduction times and data sizes of I-pictures included in the respective identified video object units,
• controlling the reading means and the reproduction means to read and reproduce the identified I-pictures to realize the reproduction at the predetermined speed.