Content reproducing device, content reproducing method, and computer readable medium

1. A content reproducing device comprising:

a content acquisition unit configured to read content from a recording medium, the content including at least, (a) an image signal of an image frame defined by a first direction and a second direction perpendicular to the first direction, (b) a first size and a second size respectively showing sizes in the first direction and the second direction of the image frame, and (c) information on a predetermined aspect ratio;

a display area determination unit configured to calculate a third size by multiplying the first size by the predetermined aspect ratio and determine, as a display area of the image frame, an area defined by (i) an entire range in the image frame in the first direction and a range of length of the third size in the second direction from a predetermined position in the image frame when a difference between the third size and the second size is a predetermined value or smaller and (ii) an entire area of the image frame when the difference is larger than the predetermined value; and

a reproduction controller configured to perform control so that the display area of the image frame is displayed and a part other than the display area in the image frame is not displayed.

2. The device of claim 1 , wherein the predetermined value is sixteen.

3. The device of claim 1 , wherein the predetermined position is one of both ends of an entire range in the second direction in the image frame.

4. The device of claim 1 , wherein the reproduction controller performs control so that a black image is displayed in the part other than the display area in the image frame.

5. The device of claim 1 , wherein the reproduction controller displays the image frame in a window, and hides the part other than the display area in the image frame by making the window smaller.

6. The device of claim 1 , wherein the first direction is a vertical direction while the second direction is a horizontal direction, or the first direction is the horizontal direction while the second direction is the vertical direction.

7. A content reproducing method comprising:

reading content from a recording medium, the content including at least, (a) an image signal of an image frame defined by a first direction and a second direction perpendicular to the first direction, (b) a first size and a second size respectively showing sizes in the first direction and the second direction of the image frame, and (c) information on a predetermined aspect ratio;

calculating a third size by multiplying the first size by the predetermined aspect ratio and determining, as a display area of the image frame, an area defined by (i) an entire range in the image frame in the first direction and a range of length of the third size in the second direction from a predetermined position in the image frame when a difference between the third size and the second size is a predetermined value or smaller and (ii) an entire area of the image frame when the difference is larger than the predetermined value; and

performing control so that the display area of the image frame is displayed and a part other than the display area in the image frame is not displayed.

8. The method of claim 7 , wherein the predetermined value is sixteen.

9. The method of claim 7 , wherein the predetermined position is one of both ends of an entire range in the second direction in the image frame.

10. The method of claim 7 , wherein a black image is displayed in the part other than the display area in the image frame.

11. The method of claim 7 , wherein the image frame is displayed in a window, and the part other than the display area in the image frame is hidden by the window being made smaller.

12. The method of claim 7 , wherein the first direction is a vertical direction while the second direction is a horizontal direction, or the first direction is the horizontal direction while the second direction is the vertical direction.

13. A non-transitory computer readable medium storing a program which, when executed by a computer, causes the computer to perform steps comprising:

reading content from a recording medium, the content including at least, (a) an image signal of an image frame defined by a first direction and a second direction perpendicular to the first direction, (b) a first size and a second size respectively showing sizes in the first direction and the second direction of the image frame, and (c) information on a predetermined aspect ratio;

calculating a third size by multiplying the first size by the predetermined aspect ratio and determining, as a display area of the image frame, an area defined by (i) an entire range in the image frame in the first direction and a range of length of the third size in the second direction from a predetermined position in the image frame when a difference between the third size and the second size is a predetermined value or smaller and (ii) an entire area of the image frame when the difference is larger than the predetermined value; and

performing control so that the display area of the image frame is displayed and a part other than the display area in the image frame is not displayed.

14. The medium of claim 13 , wherein the predetermined value is sixteen.

15. The medium of claim 13 , wherein the predetermined position is one of both ends of an entire range in the second direction in the image frame.

16. The medium of claim 13 , wherein a black image is displayed in the part other than the display area in the image frame.

17. The medium of claim 13 , wherein the image frame is displayed in a window, and the part other than the display area in the image frame is hidden by the window being made smaller.