Abstract: Disclosed is a multicast controlling apparatus and method in a multi hop network. The multicast controlling apparatus in the multi hop network includes a packet determining unit to receive a packet from a group management query device or a station, and to determine whether the received packet is a group management protocol packet, a packet type distinguishing unit to distinguish a type of the received packet when the received packet is determined as the group management protocol packet, and a packet transmitting unit to transmit the packet to a second port excluding a first port that receives the query message, when the received packet is determined as the query message.

Abstract: Provided are a participant terminal device, a wired and wireless coupled server for supporting broadcasting participation, and a method of providing a participational broadcasting service. The wired and wireless coupled server may include: an information obtainment unit to obtain channel information associated with a broadcast provided to at least one participant terminal device among a plurality of terminal devices in response to a participation request from the at least one participant terminal device; and an information processor to enable the at least one participant terminal device to access a participation control server associated with the broadcasting participation using participation address information corresponding to the obtained channel information by identifying the participation address information and transmitting the identified participation address information to the at least one participant terminal device.

Abstract: Provided is an Optical Network Unit (ONU) and a method of operating the ONU. The ONU may include: a measurement unit to measure a downstream optical signal strength of downstream data received from an Optical Line Termination (OLT) via an optical splitter; a determination unit to determine an upstream optical signal strength based on the measured downstream optical signal strength; and a communication unit to transmit, to the OLT via the optical splitter, upstream data generated based on the determined upstream optical signal strength.

Abstract: A wavelength division multiplexing passive optical network system is provided. A central office generates a multi-mode light having a mode interval equal to a period interval of a multiplexing filter of the remote node and the multi-mode light is used to control a wavelength of an uplink transmission optical signal of the optical network unit. A remote node multiplexes the multi-mode light with the multiplexing filter to transmit the multiplexed multi-mode light to the optical network unit and demultiplexes the uplink transmission optical signal to transmit the demultiplexed uplink transmission optical signal to the central office. An the optical network unit generates the uplink transmission optical signal by modulating a data signal with a Fabry-Perot laser which uses the multiplexed multi-mode light as an injection optical source. Accordingly, it is possible to control a wavelength of a transmitter of the optical network unit by using the injection optical source generated by the central office.

Abstract: Provided are a fast channel change apparatus based on multiple multicasts communication in an IPTV network, and a method thereof. In the fast channel change system, after separately generating at least one multicast stream obtained by applying different time delays respectively to original multicast stream to be broadcast, a channel server dynamically analyzes information regarding the at least one multicast stream. After querying the channel server for information regarding an optimal multicast stream and receiving the response to the query, a user terminal joins a multicast group on the optimal multicast stream through a router. After a predetermined time is elapsed, the user terminal joins a multicast group of the original multicast stream. Thus, it is possible to easily and inexpensively embody a fast channel change function network based on multiple multicasts communication in an IPTV network.

Abstract: There is provided a IPTV digital broadcast system and method capable of reducing a channel change time, the system including: an IPTV providing server providing a broadcast stream including broadcast data for each channel; an EPG server, when a client terminal accesses, providing an EPG, multicast group information for each channel, and PID information for each channel to the client terminal; and a PID providing server acquiring the PID information for each channel itself and providing the PID information for each channel to the EPG server.

Abstract: A system for personal Internet protocol (IP) broadcasting to which a personal digital rights management (DRM) is applied, and a method thereof are provided.

Abstract: Disclosed is a system of transporting multimedia based on network, and more particularly, to an apparatus for inserting, transporting and extracting a timestamp through a network protocol. A network timestamp is transported without changing a preset transport standard such as a UDP, an RTP and a MPEG-2 standard by adding a packet having a timestamp, which is used to compensate for network jitter and used for synchronization, to a packet stream transported through a UDP or an RTP.

Abstract: A method and apparatus for transceiving a multi-view video to provide a two-dimensional (2D) video service as well as a three-dimensional (3D) video service or a multi-view 3D video service is provided. When a 2D video or a 3D stereo video or multi-view 3D video is transmitted in a 2D video synthesized by a video synthesizer, format supplementary information about the synthesized video is inserted to the PSI, PES or ES_Descriptor. The synthesized 2D video is decoded by a single video decoder and the decoded synthesized video is recovered to an original video by a video recovery unit with reference to the format supplementary information.

Abstract: A burst mode optical repeater is provided. The burst mode optical repeater receives optical signals, which are transmitted from a plurality of optical network units (ONUs) in a passive optical network (PON) to a central office using a time division multiplexing access (TDMA) method, and relays the received optical signals using an optical-electrical-optical (OEO) method. Since the burst mode optical repeater can be installed anywhere between an optical line terminal (OLT) and the ONUs, the number of subscribers and transmission range that can be supported by a corresponding network can be increased.

Abstract: A user equipment and an advertisement service server for a bidirectional personalized advertisement, and a bidirectional personalized advertisement method are provided. The UE receives user setting information and advertisement meta-information from the advertisement service server, stores the received user setting information and advertisement meta-information, searches for advertisement contents corresponding to the user setting information from the stored advertisement meta-information and selects the found advertisement contents when an advertisement event occurs, and displays the selected advertisement contents. Accordingly, the dependence of an online advertisement service on a particular media service can be prevented.

Abstract: A broadcast service provider must transmit broadcast programs by dynamically reflecting real-time reconfiguration of broadcast timetables and broadcast programs of a plurality of broadcast program providers and the broadcast service provider. A broadcast program providing apparatus and method for supporting dynamic delivery of program timetables and broadcast programs are provided.

Abstract: There is provided a personal-oriented multimedia studio platform apparatus. A plurality of users to share multi-media objects by providing a function of authoring 3-Dimensional (3D) objects using a common-use camera instead of expensive mechanism for acquiring a 3D image, providing robust interaction with a user by means of augmented reality implementation and an automatic user motion extraction function, and allowing a user to receive a content object from a remote server.

Abstract: A system for surveying audience ratings in real-time in an Internet protocol TV (IPTV) network and a method thereof are provided. The system for surveying audience ratings in real-time includes an electronic program guide (EPG) server providing channel information and audience rating survey server information to an IPTV client; the IPTV client outputting periodically reception information including channel and subscriber information, the channel being received after being selected based on the channel information; and an audience rating survey server surveying audience ratings based on the reception information. According to the system and method, the addition of any information in a broadcasting stream is not required for an audience rating survey, additional devices are not requested to be installed in the houses of viewers or listeners, and without the necessity of their cooperation, audience ratings can be automatically performed in real-time.

Abstract: An interactive advertisement system and a method thereof are provided. The interactive advertisement system includes an advertiser server, a local advertisement server, and a service receiver. The advertiser server requests registration of advertisement information by setting advertisement ID including target service areas and provides services in response to an order of available services corresponding to the advertisement information. The local advertisement server stores and registers the advertisement information including the advertisement ID corresponding to the registration request of the advertiser server, multicasts the registered advertisement information with the advertisement ID through an IP network, and transmits information related to a service request to the advertiser server.

Abstract: Provided are a sing-unit integrated transceiver having a pump source and a transceiver module using the transceiver.

Abstract: There is provided a user device for providing customized contents, including: a data receiving unit for receiving user multimedia data from outside; an authoring information setting unit for setting user authoring information on the user multimedia data upon a user's request; a data encoding unit for encoding the user multimedia data and the user authoring information to generate contents data; a data transmission unit for transmitting the generated contents data to a customized contents authoring device through a network; a data receiving unit for receiving authorized data transmitted from the customized contents authoring device; and a data output unit for extracting the customized contents data from the received customized data and outputting the extracted contents data.

Abstract: Provided are a passive optical network system and a method of transmitting a broadcasting signal in the same system. A central office (CO) generates a broadcasting signal and a downstream optical data signal using a coding method guaranteeing a run-length, multiplexes the downstream optical data signal and the broadcasting signal, and transmits the multiplexed downstream optical data signal and broadcasting signal. A remote node (RN) transmits the multiplexed downstream optical data signal and broadcasting signal received from the CO to one or more optical network units (ONUs). A gain medium, which is located on a transmission line between the CO and the RN, amplifies the broadcasting signal using the downstream optical data signal as a pump light source. Accordingly, a high gain can be obtained by amplifying the broadcasting signal using the gain medium located on the transmission line without a separate pump light source.

Abstract: A system and method for providing an interactive multimedia service to a user in an access network are provided. The system includes a multimedia service providing server and a user terminal. The multimedia service providing server creates multimedia information requested by a user terminal, processes the created multimedia information, and manages a corresponding communication channel to allow a predetermined user terminal to receive the processed multimedia information. The user terminal transmits inputted user multimedia information to the multimedia service providing server through the access network and receives the multimedia information transmitted from the multimedia service providing server through the access network.

Abstract: A pluggable optical transceiver module is provided. The pluggable optical transceiver module is fitted to and removed from a receptacle having a clamp at an end in an optical communication system body and includes a housing frame having an adaptor at which a light emitting diode (LED) display unit and an optical transceiver element are installed; a rotary lever comprising a handle at one side and a pressing portion at another side so that the rotary lever rotates by a predetermined angle with respect to one side of the housing frame; and an elastic arm which is pivoted on the housing frame to be rotated by the rotary lever and includes one end contacting the pressing portion according to rotation of the rotary lever and another end coupled with or separated from the clamp of the receptacle by the rotation.