Abstract: A device and method for searching for content, the device including: a display; a storage configured to store a plurality of contents; an inputter configured to receive a user answer to a question displayed on the display for searching for content stored in the storage; and a controller configured to determine, based on the plurality of contents, the question, output, through the display, the determined question, determine, based on the user answer to the output question, a criterion for searching for content, and output, through the display, a search result searched based on the criterion.

Abstract: Provided is a method of transmitting and receiving personal broadcasting data in a peer-to-peer (P2P) based network. A terminal (client) that receives a personal broadcast requests a tracker server for a viewing reservation by using electronic program guide (EPG) information or a uniform resource locator (URL) of a personal broadcasting channel, a terminal (broadcaster) that transmits personal broadcasting data receives a list of clients that made a viewing reservation of the personal broadcast from the tracker server and notifies the clients about starting of the personal broadcast when it is time to start the personal broadcast. Accordingly, the client starts streaming when notified of the starting of the personal broadcast by connecting to the personal broadcasting channel after making the viewing reservation, without having to wait for the personal broadcast to start.

Abstract: A method for registering a device to a server is provided. The method includes connecting a first device to a second device, the first device having been registered to the server; receiving, by the first device, device information of the second device from the second device; transmitting, by the first device, the device information of the second device to the server; receiving, by the first device, information for authentication of the second device based on the device information of the second device from the server; and transmitting, if the information for authentication of the second device is received, the information for authentication of the second device to the second device.

Abstract: A method and apparatus are provided for performing adaptive streaming according to a streaming environment based on information about a plurality of elements for determining qualities of a plurality of media data with respect to the same content.

Abstract: A user terminal includes an inputter which receives a user command, a display, a communicator configured to communicate with an external server, and a controller configured to create a first rule in which the user terminal performs a first action when a first condition is met in another first user terminal, control the communicator to transmit the created first rule to the external server, and perform the first action according to an event command when the event command to perform the first action is received from the external server upon the first condition being met in the first user terminal.

Abstract: A streaming method and apparatus, in which information regarding a plurality of chapters of content is inserted into a media presentation description that includes information regarding a plurality of media data generated by encoding the content so as to have different qualities, and then, streaming is performed based on the information.

Abstract: A user terminal device, an information providing system, and a method of providing information thereof are provided. The method for providing information in a user terminal device includes registering contact information in an address list according to a user's input, transmitting an event of registering the contact information to an external server, in response to profile information which corresponds to the contact information being received from the server, storing contact information registered in the address list and the profile information in association with each other, and in response to a display item which corresponds to the contact information being selected while the address list is displayed, displaying the profile information.

Abstract: A method of operating an image display apparatus includes receiving image contents, performing a social network service (SNS) according to the image contents, receiving a reference time set according to information corresponding to an image contents reproduction time of a plurality of image display apparatuses interworking with the SNS, and displaying the image contents according to the reference time.

Abstract: Disclosed are an information storage medium storing metadata for providing additional content during a broadcast program, the metadata including information indicating whether to insert second additional content instead of first additional content, which is underlying additional content of the broadcast program, and a locator of the second additional content, a method of providing additional content by using the same, and a digital broadcast reception apparatus.

Abstract: A terminal apparatus provides shared profile information that is selectively received from a server based on a relationship between a first user and a second user, according to whether information of the second user is stored in the terminal apparatus of the first user as local profile information and information of the first user is stored in the terminal apparatus of the second user as the local profile information. Accordingly, a phonebook service for desired profile information is provided only for users in a buddy relationship sharing contact information with each other.

Abstract: Method and apparatus for receiving data by using a plurality of pieces of information managed by a server that manages information about data that can be received via one or more peer-to-peer (P2P) networks and information about peers respectively connected to each P2P network.

Abstract: A device and method for searching for content are provided. The device includes: a display; a storage configured to store a plurality of contents; an inputter configured to receive a user answer to a question displayed on the display for searching for content stored in the storage; and a controller configured to determine, based on the plurality of contents, the question, output, through the display, the determined question, determine, based on the user answer to the output question, a criterion for searching for content, and output, through the display, a search result searched based on the criterion.

Abstract: A user terminal apparatus for uploading contents, a user terminal apparatus for downloading contents, a server, a content sharing system, and methods thereof are provided. The contents sharing method includes creating contents, uploading the created contents from the user terminal apparatus to a server, receiving, at the user terminal, storage location information corresponding to a location in the server where the uploaded contents are stored and access authorization information for accessing the uploaded contents from the server, and transmitting a message including the storage location information and the access authorization information from the user terminal apparatus to a second user terminal apparatus.

Abstract: A method and a system for tagging information about an object included in an image to the image, and searching for the image by using the tagged information, and an apparatus and a computer-readable recording medium thereof. The method includes: detecting at least one object included in a displayed image, receiving, from a user, information about the detected object, and tagging the received information to the displayed image.

Abstract: A method for generating and utilizing a bookmark in a streaming service system is provided. In a method for operating a server providing contents in an adaptive streaming service system, contents of a segment basis according to adaptive streaming is provided to a client. When a bookmark generate request message is received from the client, a bookmark generate request and segment identify information are transmitted to a bookmark server.

Abstract: A method and apparatus for providing a trick play service in a hypertext transfer protocol (HTTP) adaptive streaming (HAS) architecture for adaptively streaming media data according to fluctuation of a streaming environment are provided. The method at a server includes: generating a media presentation description (MPD) file including information about at least one piece of trick play data; transmitting the MPD file to a client; and transmitting the at least one piece of trick play data to the client in response to a request by the client based on the MPD file. The method at a client includes: receiving a media presentation description (MPD) file including information about at least one piece of trick play data; and receiving the at least one piece of trick play data from a server based on the MPD file.

Abstract: Provided are a method and apparatus for limiting a content usage authority scope of a client by using metadata in an Internet Protocol Television (IPTV) service. The method performed by a metadata server adds control information to the metadata and transmits the metadata, wherein the content usage authority scope of the client is defined in the control information. The client of a user limits a content control operation according to a user input by using the control information extracted from the metadata.

Abstract: Provided are a method and apparatus for providing and using content advisory (CA) information on Internet contents. A method of providing CA information by using a CA information server, includes receiving a request for the CA information on a content, from an Internet Protocol television (IPTV); searching for CA information on the content; and transmitting the found CA information to the IPTV. A method of using CA information when an IPTV reproduces a content not having the CA information, according to the present invention, includes transmitting a request for CA information, to a CA information server; receiving the CA information from the CA information server; analyzing the CA information; and applying the CA information.

Abstract: A method of providing a Social Networking Service (SNS) group inviting service via an SNS server, the method including receiving an SNS group invitation request containing second-user identification information, from a first device of a first user, generating first authentication information corresponding to the second-user identification information in response to the SNS group invitation request, receiving an SNS group joining request containing second authentication information, from a second device of a second user, and comparing the first authentication information and the second authentication information with each other and permitting the second device to join the SNS group.

Abstract: An information file pertaining to media data includes reproduction rating information for each of a plurality of segments. The information file is used by a client to determine what segment or segments to request from a server. The server responds to the request by sending the segment or segments to the client. Since the reproduction rating information may be provided for each of the segments, the selection of the segment or segments by the client can take into account a reproduction rating threshold.