Storage medium storing interactive graphics stream activated in response to user's command, and reproducing apparatus for reproducing from the same

1. A non-transitory storage medium comprising:

video data having a corresponding video image; and

graphics data configured to display a menu on a screen, the graphics data comprising:

first graphics data having a first menu configured to be displayed on the screen when an activation command is generated in response to a user input; and

second graphics data having a second menu configured to be displayed on the screen at adesignated time;

wherein the first menu of the first graphics data is configured to be overlaid on the video data and configured to be displayed together with the video data; and

each of the first graphics data and the second graphics data comprises an interactive composition segment structure comprising a type field for discriminating the first graphics data from the second graphics data.

2. The non-transitory storage medium of claim 1 , wherein the first graphics data is multiplexed with the video data and recorded in a single stream.

3. The non-transitory storage medium of claim 1 , wherein the first graphics data and the second graphics data are multiplexed with the video data and recorded in a single stream.

4. A non-transitory storage medium comprising:

video data; and

graphics data configured to display a menu on a screen, the graphics data comprising:

first graphics data configured to be displayed on the screen when an activation command is generated by a user; and

second graphics data configured to be displayed on the screen at a designated time;

wherein the first graphics data is configured to be overlaid on the video data and configured to be displayed together with the video data;

each of the first graphics data and the second graphics data comprises an interactive composition segment structure comprising a type field for discriminating the first graphics data from the second graphics data;

the first graphics data and the second graphics data are multiplexed with the video data and recorded in a single stream; and

object data used by the first graphics data indicates an image of the menu and is included in an independent stream.

5. A reproducing apparatus configured to reproduce video data and graphics data from a storage medium, the reproducing apparatus comprising:

a video decoder configured to decode the video data; and

a graphics decoder configured to decode the graphics data for displaying a menu on a screen, the graphics data comprising first graphics data and second graphics data;

wherein a first menu of the first graphics data is configured to be displayed on the screen when an activation command is generated in response to a user input, and a second menu of the second graphics data is configured to be displayed on the screen at a designated time;

the first menu of the first graphics data is configured to be overlaid on the decoded video data and configured to be displayed together with the decoded video data; and

each of the first graphics data and the second graphics data comprises an interactive composition segment structure comprising a type field for discriminating the first graphics data from the second graphics data.