Patent ID: 8803948

Claim:
A method of processing a digital broadcast signal for a 3-dimensional, 3D, content, the method comprising: encoding video data for the 3D content into a stream, the video data comprising a left picture for a left view and a right picture for a right view for a 3D image; generating signaling information for the video data, the signaling information including a Program Map table (PMT) providing a mapping between a program number and program elements of a program including the 3D content, wherein the PMT includes subtitling descriptor including subtitling type information, and wherein the subtitling type information indicates an existence of a 3D subtitle for the 3D content; generating packet data for subtitling of the 3D content, the packet data including subtitle segment, wherein the subtitle segment includes disparity information indicating a difference between horizontal positions of subtitles representing a same point in space in the right and left view of the 3D image for a page; and transmitting the broadcast signal including the video data, the packet data, and the signaling information; wherein the subtitle segment further includes region information identifying at least one region within the page, and region disparity information indicating differences between horizontal positions of subtitles in the at least one region identified by the region information; wherein the subtitle segment further includes region size information specifying a horizontal width of the at least one region which is expressed in pixels.