Abstract: An apparatus and a method share a comment related to contents in a mobile communication terminal. In the method, a comment regarding a contents file that is being reproduced is received. A comment Uniform Resource Locator (URL) is read from a metadata storage space of the contents file. The comment regarding the contents file is stored in a storage space of the comment URL.

Abstract: A method of generating multimedia data is provided. The method includes generating a scene tree by allocating at least one piece of object information to each of a plurality of nodes and then linking the nodes based on the relationship between a plurality of pieces of object information allocated to the nodes, adding a null node to which the object information of an exchangeable media object is allocated, and thereafter recording the null node in a scene descriptor area in a scene description language.

Abstract: A method of generating multimedia data is provided. The method includes generating a scene tree by allocating at least one piece of object information to each of a plurality of nodes and then linking the nodes based on the relationship between a plurality of pieces of object information allocated to the nodes, adding a null node to which the object information of an exchangeable media object is allocated, and thereafter recording the null node in a scene descriptor area in a scene description language.

Abstract: A method of generating multimedia data is provided. The method includes generating a scene tree by allocating at least one piece of object information to each of a plurality of nodes and then linking the nodes based on the relationship between a plurality of pieces of object information allocated to the nodes, adding a null node to which the object information of an exchangeable media object is allocated, and thereafter recording the null node in a scene descriptor area in a scene description language.

Abstract: Provided are a method and apparatus for reproducing at least one piece of content received via at least one interface. The method includes classifying the at least one piece of content respectively received via the at least one interface according to a reference attribute, allocating the classified at least one piece of content to a virtual channel, and selecting a channel from among set channels that include the virtual channel and an occupied basic channel.

Abstract: A method and apparatus for reproducing content by using metadata are provided. In the method, a metadata file and a content file are obtained, wherein the metadata file comprises at least one of learned content reproduction pattern information and reproduction management information; the content file is reproduced based on the at least one of the learned content reproduction pattern information and the reproduction management information of the metadata file; and the metadata file is updated based on the at least one of the learned content reproduction pattern information and the reproduction management information.

Abstract: Provided is a method of executing a media file including at least one media resource, the method including: importing the media file including the media resource and media information that includes at least one digital item about the media resource, at least one template, and at least one application; and selecting one piece of the media information, and executing an event of one or more media resources associated with the media information, based on the selected one piece of the media information, wherein the digital item includes the media resource and identification information of each media resource, the template includes an event of the at least one digital item and execution environment information of the event, the application includes association information of the template and the digital item, and the media information is adapted to be imported and exported.

Abstract: A method of and apparatus for updating decoding information are provided. A method of transmitting media data includes generating a media stream including one or more media data items, one or more decoding information of the media stream, and information for arranging updating of the decoding information; and transmitting the media stream, the one or more decoding information item of the media stream, and the information for arranging updating of the decoding information, in which the one or more media data items have decoding information that are different from each other. According to the method and apparatus, the amount of data to be processed and the complexity of data processing can be reduced, thereby reducing an encoding time and a media data processing time in a decoder.

Abstract: Provided is a method for manipulating a media object in a media player and an apparatus using the same. The method includes generating a rendering map for managing a region of a media object in a rendering interface according to time, receiving a user input via the rendering interface; updating the rendering map based on a user input; re-composing a scene based on the updated rendering map, and rendering the media object according to the re-composed scene.

Abstract: Provided are a method and apparatus for generating and accessing metadata in a media file format. The method of generating metadata in a media file format includes generating a time-track map composed of a plurality of map nodes that are distinguished according to track and unit time, and generating media objects corresponding to each of the map nodes, in which each of the map nodes includes position information of the corresponding media objects, thereby facilitating real-time reproduction and modification of content.

Abstract: A method of generating multimedia data is provided. The method includes generating a scene tree by allocating at least one piece of object information to each of a plurality of nodes and then linking the nodes based on the relationship between a plurality of pieces of object information allocated to the nodes, adding a null node to which the object information of an exchangeable media object is allocated, and thereafter recording the null node in a scene descriptor area in a scene description language.

Abstract: Provided is a multimedia data generation method which includes allocating one or more pieces of image object information to each of a plurality of nodes, generating a scene tree by linking nodes according to correlation between the object information allocated to each node, and adding an event execution level attribute to each node, wherein the event execution level attribute determines whether to execute an event by using the image object information allocated to each node, thereby generating multimedia data in which the added event execution level attribute is represented with a scene description language and recorded on an area of a scene descriptor.

Abstract: Provided are an apparatus and method for generating personal broadcast content. A user terminal apparatus includes a broadcast reception unit receiving broadcast content through a broadcast network; a communication unit controlling connection with a server which provides an authoring tool for generating personal broadcast content and metadata required to obtain one or more pieces of content through the broadcast network and a bi-directional communication network; a user input unit receiving a user input signal; and a control unit configuring a personal broadcast screen, which contains the content, using the authoring tool and the metadata and generating personal broadcast content in response to the user input signal. When the apparatus and method are used, a user can generate personal broadcast content using content which can be obtained through a bi-directional communication channel and a broadcast channel.

Abstract: A method of and apparatus for updating decoding information are provided. A method of transmitting media data includes generating a media stream including one or more media data items, one or more decoding information of the media stream, and information for arranging updating of the decoding information; and transmitting the media stream, the one or more decoding information item of the media stream, and the information for arranging updating of the decoding information, in which the one or more media data items have decoding information that are different from each other. According to the method and apparatus, the amount of data to be processed and the complexity of data processing can be reduced, thereby reducing an encoding time and a media data processing time in a decoder.

Abstract: An apparatus for and method of transmitting media data, and an apparatus for and method of receiving media data are provided. The method of transmitting media data includes determining whether to multiplex a media data item; determining a stream identifier for identifying a packetization layer packet of a media data item; packetizing the media data item to generate a packetization layer packet; and transmitting the packetization layer packet, wherein the packetization layer packet has a recursive structure in which an aggregated unit having a same packet structure as the packetization layer packet is included in a payload field of the packetization layer packet. The method for receiving media data includes processing received transport layer data; inverse packetizing a packetization layer packet and identifying a payload data type of the packet; and if the payload data type indicates an aggregated unit, inverse packetizing the aggregated unit.

Abstract: Provided are an apparatus and method for providing an Internet Protocol Datacasting (IPDC) service in a Digital Audio Broadcasting (DAB) system. A digital broadcasting transmission apparatus for providing an IPDC service includes an IPDC processing unit which generates IP packet data by packetizing data to be transmitted and generates information on a configuration of the IP packet data; a service linkage information (SLI) processing unit which generates SLI which is linkage information between the IP packet data and an IP bearer which delivers the IP packet data; and a transmitter which multiplexes and transmits the SLI and the IP packet data. Accordingly, by generating and using SLI for linking a DAB system and an IPDC system, the DAB system can effectively provide an IPDC service.

Abstract: A method and a device for displaying good reception-sensitivity information in a broadcast receiver. The method includes: detecting location information of the broadcast receiver and a reception sensitivity of a broadcast signal transmitted from a base station; transmitting the detected location information and reception sensitivity to a region information management server managing regional reception-sensitivity information and regional guide information; receiving from the region information management server good reception-sensitivity information, which is information on a region which is closer than a predetermined distance from the broadcast receiver and which has a reception sensitivity greater than a predetermined value, and regional guide information on the corresponding region; and displaying the received good reception-sensitivity information and the received regional guide information.

Abstract: A method and a device are provided for transmitting a broadcasting service in which a broadcasting service from a broadcasting station received by a broadcasting receiver is transmitted to one or more external terminals. The method includes: detecting format conversion information indicating a format that the broadcasting service is to be converted into by communicating with the external terminals; converting the broadcasting service into a format corresponding to the detected format conversion information; and transmitting the converted broadcasting service to the external terminals. Accordingly, the received broadcasting service can be used in the external terminals employing different formats.

Abstract: Provided are a method and apparatus for displaying the receptibility of a plurality of broadcasting services included in a single broadcasting channel as well as the receptibility of a digital broadcasting signal of a broadcasting channel. The method includes: receiving a plurality of broadcasting service bit streams included in a received broadcasting signal; checking a valid bit stream in the plurality of broadcasting service bit streams; and configuring a screen for displaying a service receptibility using the valid bit stream.

Abstract: A method for providing a location guide service for a place related to a broadcasting program by using electronic program guide (EPG) data and a broadcasting receiver for the method are provided. The method includes: decoding EPG data including location information of at least one place related to each broadcasting program; outputting the decoded electronic program guide data; detecting location information of at least one place related to the selected broadcasting program in the decoded electronic program guide data; and outputting the detected location information. The method may further include detecting and outputting a shortest path between the current location of a broadcasting receiver and a place related to the selected broadcasting program, based on the detected location information, the current location information of the broadcasting receiver, and traffic information.