Patent ID: 9137515
Filing Date: 2015-09-15
Classification: H04N

Abstract:
1. A method of transmitting a data stream for providing a digital broadcasting service, the method comprising: generating a subtitle stream comprising basic viewpoint subtitle data to reproduce a three-dimensional (3D) subtitle with the basic viewpoint subtitle data and corresponding additional viewpoint subtitle data on a video screen on which video data is reproduced; determining 3D subtitle reproduction information for forming the 3D subtitle on the video screen based on the basic viewpoint subtitle data; and outputting a data stream by multiplexing a video stream comprising the video data, the 3D subtitle reproduction information, and the subtitle stream, wherein the 3D subtitle reproduction information comprises 3D subtitle type information indicating a form of the 3D subtitle which is used to form the 3D subtitle based on the basic viewpoint subtitle data, wherein the 3D subtitle type information indicates one of a first subtitle type forming the 3D subtitle by using the basic viewpoint subtitle data and distance information, and a second subtitle type forming the 3D subtitle by using the basic viewpoint subtitle data and the additional viewpoint subtitle data, wherein the distance information indicates a distance between the basic viewpoint subtitle and the additional viewpoint subtitle for a plurality of dimensions, and comprises information about a direction of the distance between the basic viewpoint subtitle and the additional viewpoint subtitle, and wherein the 3D subtitle reproduction information comprises information indicating a reproduction priority from between the first subtitle type and the second subtitle type.