Broadcast receiver and 3d subtitle data processing method thereof

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 data;
• generating signaling information for the video data, wherein the signaling information includes subtitling descriptor including subtitling type information, wherein the subtitling type information indicates an existence of a subtitle for the 3D content;
• generating packet data including subtitle segment for subtitling of the 3D content;
• transmitting the broadcast signal including the video data, the packet data and the signaling information, wherein the subtitle segment includes a segment type identifying the subtitle segment, a page identifier indicating a page on which the subtitle is displayed, region information identifying at least one region within the page, object part horizontal position indicating a horizontal position of the top left pixel of an object part in the at least one region and 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 data for the page.

An apparatus for receiving a digital broadcast signal for a 3-dimensional (3D) content, the method comprising:

• a receiving unit configured to receive a broadcast signal including video data for the 3D content, the video data comprising a left picture for a left view and a right picture for a right view for a 3D data;
• an extracting unit configured to extract signaling information for the video data and packet data including subtitle segment for subtitling of the 3D content, wherein the signaling information includes subtitling descriptor including subtitling type information, wherein the subtitling type information indicates an existence of a subtitle for the 3D content;
• and
• a controller configured to control a display of subtitle in the 3D data for the 3D content based on the subtitling type information and the subtitle segment, wherein the subtitle segment includes a segment type identifying the subtitle segment, a page identifier indicating a page on which the subtitle is displayed, region information identifying at least one region within the page, object part horizontal position indicating a horizontal position of the top left pixel of an object part in the at least one region and 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 data for the page.