Patent ID: 8704874

Claim:
A method for transmitting a three dimensional (3D) caption signal, the method comprising: preparing a 3D image signal for displaying a 3D image; generating 3D caption data based on a code space, wherein the 3D caption data includes 3D caption information and caption text, wherein the caption data is formatted within picture user data, and wherein the picture user data is inserted at any of Sequence level, Group of Pictures (GOP) level, and Picture Data level; and inserting the 3D caption information and the caption text into a video picture header region to code the image signal, and transmitting the same, such that a caption image including 3D caption text disposed in a 3D caption box is generated based on the 3D caption information and the caption text in a 3D display device, wherein the code space contains base code sets and extended code sets, and wherein the 3D caption information is delivered in at least one extended code set and the at least one extended code set is accessed by using an ‘EXT1’ code in a base code set, such that a caption image including 3D caption text disposed in a 3D caption box is generated based on the 3D caption information and the caption text in a 3D display device.