7. A three-dimensional (3D) display apparatus comprising: a signal receiving unit for receiving a broadcast signal including 3D caption data based on a code space; a caption decoding unit for decoding the caption data to acquiring 3D command and caption text from the 3D caption data, wherein the 3D command is delivered in a C3 code set contained in the code space, wherein the C3 code set is accessed by using an ‘EXT1’ code in a base code set, wherein the 3D command provides disparity data which applies to a caption window; and a processing unit for processing the disparity data and the caption text such that the caption text is written to the caption window for 3D captioning.
7. A three-dimensional (3D) display apparatus comprising: a signal receiving unit for receiving a broadcast signal including 3D caption data based on a code space; a caption decoding unit for decoding the caption data to acquiring 3D command and caption text from the 3D caption data, wherein the 3D command is delivered in a C3 code set contained in the code space, wherein the C3 code set is accessed by using an ‘EXT1’ code in a base code set, wherein the 3D command provides disparity data which applies to a caption window; and a processing unit for processing the disparity data and the caption text such that the caption text is written to the caption window for 3D captioning. 10. The apparatus of claim 7 , wherein the code space is defined in CEA-708 standard.