CLAIMS

[Claim 1]
A data structure including:
image data of an L image for left eye and an R image for right eye, of a sub-image, used for 3D (3 Dimensional) display of said sub-image made up of a subtitle or a menu button;
wherein an epoch structure of image data of said L image and image data of said R image is the same.

[Claim 2]
The data structure according to Claim 1, wherein said sub-image is provided with a sub-image ID which is an ID unique to said sub-image;
and wherein, in the image data of said L image and the image data of said R image, the sizes of said sub-images provided with the same sub-image ID are the same in the vertical direction and the horizontal direction.

[Claim 3]
The data structure according to Claim 1, further including:
position information and size information of a window indicating a display range of said subtitle within each screen of said L image and said R image, and an ID unique to the window;
and wherein, in the size information of said L image
and the size information of said R image, the sizes of said windows with the same window ID are the same in the vertical direction and the horizontal direction. [Claim 4]
The data structure according to Claim 1, wherein, in the image data of said L image and the image data of said R image, information of a color usable as a color for said sub-image is the same.

[Claim 5]
A recording medium in which is recorded data of the data structure according to any one of Claims 1 through 4.

[Claim 6]
A playing device which, in the event of playing data of a data structure including
image data of an L image for left eye and an R image for right eye, of a sub-image, used for 3D (3 Dimensional) display of said sub-image made up of a subtitle or a menu button,
wherein an epoch structure of image data of said L image and image data of said R image is the same;
reads out image data of said L image and said R image included in said data, in increments of screens; and
outputs, at the same time, image data of said L image in increments of screens, and image data of said R image in increments of screens.

[Claim 7]
The playing device according to Claim 6, comprising: readout means for reading out image data of said L image and said R image included in said data, in increments of screens;
L image holding means for holding image data of said L image read out by said readout means;
R image holding means for holding image data of said R image read out by said readout means; and
control means for, in the event of holding of image data of said L image for one screen by said L image holding means ending and holding of image data of said R image for one screen by said R image holding means ending, reading out image data of said L image from said L image holding means in increments of screens and at the same time reading out image data of said R image from said R image holding means in increments of screens, and outputting at the same time image data of said L image in increments of screens and image data of said R image in increments of screens.

[Claim 8]
A playing method comprising the steps of a playing device, which plays data of a data structure including
image data of an L image for left eye and an R image for right eye, of a sub-image, used for 3D (3 Dimensional) display of said sub-image made up of a subtitle
or a menu button;
wherein an epoch structure of image data of said L image and image data of said R image is the same;
reading out image data of said L image and said R image included in said data, in increments of screens; and
outputting, at the same time, image data of said L image in increments of screens, and image data of said R image in increments of screens.

[Claim 9]
A program for causing a computer, which executes control of playing data of a data structure including
image data of an L image for left eye and an R image for right eye, of a sub-image, used for 3D (3 Dimensional) display of said sub-image made up of a subtitle or a menu button;
wherein an epoch structure of image data of said L image and image data of said R image is the same,
to execute control processing including the steps of: reading out image data of said L image and said R image included in said data, in increments of screens; and
outputting, at the same time, image data of said L image in increments of screens, and image data of said R image in incre