Abstract: A method and apparatus for providing a three-dimensional (3D) image is provided. In the method, first-viewpoint image data and second-viewpoint image data that provide a 3D image are obtained. Time information that represents points of time that the first-viewpoint image data and the second-viewpoint image data are to be processed is produced, based on relation information to indicate that the first-viewpoint image data and the second-viewpoint image data are a pair of pieces of image data. The first-viewpoint image data, the second-viewpoint image data, and the time information are transmitted. The first-viewpoint image data is transmitted in a first stream, and the second-viewpoint image data is transmitted in a second stream.

Abstract: A reception device is provided. The reception device includes: a first receiver receiving a first real-time transport stream via a broadcast network; a second receiver receiving a second real-time transport stream via a communication network; a delay processor delaying at least one of the first and second real-time transport streams for synchronization; a first detector detecting first data from the first real-time transport stream; a second detector detecting second data from a second real-time transport stream; a signal processor combining the first data and the second data so as to constitute multimedia content; and a playing unit playing the multimedia content.

Abstract: Provided are a method and apparatus for processing a graphic stream. The method may include determining whether a graphic picture is reproducible as a three-dimensional (3D) image by assigning different depth values according to graphic objects or by assigning the same depth value to the graphic picture, using 3D capability information.

Abstract: The present invention comprises: a receiving unit for receiving, through different paths, a first signal including a left-side image and a first synchronization information item, and a second signal including a right-side image and a second synchronization information item; and a signal processing unit for synchronizing and reproducing the left-side image and the right-side image using the first synchronization information item and the second synchronization information item. At least one information item, from among a content start information item, a timestamp difference between a first data item and a second data item, a frame index, a time code information item, a UTC information item, and a frame count information item, can be used as the first and second synchronization information items. Accordingly, different data can be effectively synchronized.

Abstract: Provided are a method and apparatus for processing a graphic stream. The method may include determining whether a graphic picture is reproducible as a three-dimensional (3D) image by assigning different depth values according to graphic objects or by assigning the same depth value to the graphic picture, using 3D capability information.

Abstract: A method of transmitting digital broadcasting content for providing 2D content or 3D content. The method includes: encoding content including at least one of the 2D content and the 3D content and generating an elementary stream including encoded data of the content; generating service additional information including electronic program guide (EPG) information of the digital broadcasting content and inserting, into the service additional information, at least one of 2D/3D content identification information representing a method of reproducing the 2D content or the 3D content, 2D/3D content link information representing a relationship between the 2D content and the 3D content, and EPG 3D reproduction information for reproducing an EPG screen, on which EPG information is displayed, in 3D; and generating a transport stream by multiplexing the elementary stream and the service additional information.

Abstract: A method and apparatus for encoding and decoding three-dimensional (3D) image data is provided. The method of encoding 3D image data uses a data unit that includes a header area and a data area. Type information which indicates a type of data included in the data area is included in the header area, includes: encoding reference view image data and additional view image data for providing a 3D image; generating a first data unit by adding to the reference view image data a header which includes first unit type information from among pieces of type information defined in a legacy device; and generates a second data unit by adding to the additional view image data a header which includes second unit type information from among pieces of type information not defined in the legacy device.

Abstract: A method of generating a broadcasting bitstream for a digital caption broadcast, the method including: receiving video data in which a video including at least one of a two-dimensional (2D) video and a three-dimensional (3D) video is encoded; determining caption data for reproduction in conjunction with the video, and 3D caption converting information including information relating to a converting speed of an offset for reproducing the caption data as a 3D caption; and outputting a bitstream for a digital broadcast by multiplexing the received video data, the determined caption data, and the determined 3D caption converting information.

Abstract: A receiver is provided. The receiver includes a first receiving unit which receives a first stream over a broadcasting network; a second receiving unit which receives a second stream over a communication network; a data processing unit which detects aggregation information from at least one of the first and second streams, and which assembles and processes data of the first stream and data of the second stream according to the aggregation information; and an output unit which outputs the data processed by the data processing unit. Thus, relevant data can be assembled and processed easily.

Abstract: A metadata generating method including: receiving sub-region dividing information to divide an object into a plurality of sub-regions; and generating sub-region indicating information to indicate each of the plurality of sub-regions divided according to the sub-region dividing information.

Abstract: An image processing apparatus and method includes extracting video depth information indicating a depth of a 3D video image from a video stream. The image processing apparatus and method also includes adjusting a depth value of a graphic screen, to be synchronized with the 3D video image, using the video depth information.

Abstract: A method and apparatus for providing a three-dimensional (3D) image is provided. In the method, first-viewpoint image data and second-viewpoint image data that provide a 3D image are obtained. Time information that represents points of time that the first-viewpoint image data and the second-viewpoint image data are to be processed is produced, based on relation information to indicate that the first-viewpoint image data and the second-viewpoint image data are a pair of pieces of image data. The first-viewpoint image data, the second-viewpoint image data, and the time information are transmitted. The first-viewpoint image data is transmitted in a first stream, and the second-viewpoint image data is transmitted in a second stream.

Abstract: A method and an apparatus for transmitting and receiving a broadcasting stream for providing a digital broadcasting service including a subtitle service are provided. A method of transmitting a data stream includes: generating a subtitle stream including basic viewpoint subtitle data and additional viewpoint subtitle data to reproduce a three-dimensional (3D) subtitle 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 including the video data, the 3D subtitle reproduction information, and the subtitle stream.

Abstract: Provided are a method and apparatus for processing a graphic stream. The method may include determining whether a graphic picture is reproducible as a three-dimensional (3D) image by assigning different depth values according to graphic objects or by assigning the same depth value to the graphic picture, using 3D capability information.

Abstract: A method of processing video images is provided. The method includes reproducing 3-dimensional (3D) video images by generating left-eye video images and right-eye video images from a video stream, receiving a first command for activating a pop-up interactive graphics stream during the reproduction of the 3D video images, and reproducing 2-dimensional (2D) video images by generating either left-eye video images or right-eye video images from the video stream, in response to the first command for activating the pop-up interactive graphics stream.

Abstract: A method and apparatus for generating a data stream for providing a three-dimensional (3D) multimedia service and a method and apparatus for receiving the data stream are provided. The generating method includes: generating at least one elementary stream (ES) including video data of each view from a program for providing a two-dimensional (2D) or 3D multimedia service; generating program map table (PMT) information about the program, including reference information about the at least one ES and 3D additional information for identifying and reproducing the video data of each view; and generating at least one transport stream (TS) by multiplexing packetized elementary stream (PES) packets generated by packetizing the at least one ES, and the PMT information.

Abstract: A multimedia stream generating method for 3-dimensional (3D) reproduction of additional reproduction information is provided, the method includes generating a video elementary stream (ES), an audio ES, an additional data stream, and an ancillary information stream that respectively comprise video data, audio data related to the video data, data of additional reproduction information which is to be reproduced together with the video data on a display screen, and additional reproduction information depth information used for 3D reproduction of the additional reproduction information.

Abstract: A multimedia stream generating method for 3-dimensional (3D) reproduction of additional reproduction information is provided. The method includes generating a video elementary stream (ES), an audio ES, an additional data stream, and an ancillary information stream that respectively comprise video data, audio data related to the video data, data of additional reproduction information which is to be reproduced together with the video data on a display screen, and additional reproduction information depth information used for 3D reproduction of the additional reproduction information, the video data including at least one of a 2D video image and a 3D video image.

Abstract: A method and apparatus for processing a signal, including: extracting three-dimensional (3D) reproduction information for reproducing a subtitle, which is reproduced with a video image, in 3D, from additional data for generating the subtitle; and reproducing the subtitle in 3D by using the additional data and the 3D reproduction information.

Abstract: Provided are a method of recording content, a method of providing a title key, an apparatus for recording content, and a content providing server, which can prevent unauthorized users from recording the title key on a plurality of discs. The method of recording content downloaded from a network includes: receiving a title key, which is encrypted with a disc key of a disc on which content is to be recorded in a recording apparatus, from a server; and recording the received title key and the content on the disc.