Abstract: Disclosed is a digital broadcasting transmission apparatus for rapid channel change to an A/V stream of a predetermined channel, the apparatus including a program specific information (PSI) generation unit for generating PSI of the A/V stream, a PSI length detection unit for detecting a length of the PSI generated by the PSI generation unit; a channel information (CI) generation unit for generating CI which includes PSI of all digital broadcasting channels input to the digital broadcasting transmission apparatus, a CI insertion unit for dividing and inserting the CI generated by the CI generation unit into a PSI transmission area generated by the PSI generation unit, according to the length information detected by the PSI length detection unit, and a transport stream (TS) multiplexing unit for multiplexing and outputting the A/V stream and an output of the CI insertion unit.

Abstract: The present invention relate to a content service method, which enables a user reproducing/watching a video content to easily and freely input a user comment on an image area or a specific reproduction section of a specific scene, and automatically registers/posts a corresponding article to a web service based on tagging information according to the input user comment, thereby enabling the user to acquire additional comments, such as necessary replies/opinions, from a group of many unspecified intelligent users who use the web service, and which further generates/manages additional information on each video content based on the user comment on the specific image area or the specific reproduction section of the specific scene and additional comments on the user comment made by many unspecified users, thereby generating/managing more detail and various additional information on the video content.

Abstract: A packet type retransmission system for DMB services includes a DMB device for receiving multimedia data from a content provider, for converting the multimedia data to DMB data for DMB transmission, and for transmitting the DMB data. A broadcasting transfer medium transfers the DMB data transmitted through the DMB device. A DMB-IP converter receives the DMB data transferred through the broadcasting transfer media and converts the DMB data to packet based data. An IP based multimedia transmitting device outputs the packet based multimedia data converted through the DMB-IP converter to user devices.

Abstract: Disclosed is a method for extracting a region-of-interest of a user in a multimedia mobile terminal. The method includes: setting a search region in an input picture input to the multimedia mobile terminal on a screen picture-to-screen picture basis, and extracting a group of boundary of a region-of-interest based on a brightness difference between the set search region and an environment around the set search region; determining boundary coordinates of the region-of-interest through learning during a predetermined frame among the extracted group of boundary coordinate candidates; and enlarging the region-of-interest having the determined boundary coordinates, and displaying the enlarged region-of-interest. As a result, a region the user is most interested in or pays more attention to than other regions on a screen is automatically extracted.

Abstract: Disclosed are a system and a method for minimizing signal interference for a broadcasting and communication convergence section within a local area, and an apparatus applied to the same. The system has a construction of mounting a plurality of multi RF (Radio Frequency) channels within a short-range wireless transmitting apparatus located in a local area and minimizing signal interference between mutually adjacent RF channels within the short-range wireless transmitting apparatus in a standard for providing a broadcasting and communication convergence service. Accordingly, it is possible to remove the mutual channel effects affecting a communication signal without signal interference for adjacent channels due to a broadcasting signal and it is not necessary to enhance a filtering characteristic for the adjacent channels of a chipset, which corresponds to a broadcasting and communication convergence standard structure in a local area, so that there is an advantage of reducing network investment costs.

Abstract: A system for evaluating video quality using auxiliary information of a codec includes a video transmitter that includes a source video input unit for inputting source video, an encoding unit for encoding the input source video, a decoding unit for decoding encoded video data, and a video quality evaluation unit for evaluating video quality using the decoded video data. The encoding unit transmits auxiliary information required for video quality evaluation, among information acquired in an encoding procedure, to the video quality evaluation unit. The video quality evaluation unit evaluates video quality using the decoded video data received from the decoding unit, and the auxiliary information received from the encoding unit.

Abstract: Provided are methods and apparatuses for coding a motion vector by a multimedia image codec. The method including: calculating and storing difference vectors which represent differences between adjacent motion vectors of image data; selecting a central axis of the stored difference vectors based on trend information of the difference vectors; transforming the difference vectors based on the central axis of the difference vectors; and performing bit coding using the axis-transformed difference vectors.

Abstract: A system and method for performing a handover of a mobile station (MS) by considering Quality of Service (QoS) in a broadband mobile communication system. The method can include the steps of: receiving information about one or more neighbor base stations and reception strengths for the neighbor base stations from a Serving Radio Access System (RAS) currently communicating with the MS; extracting a value of a specific field from the received information about the neighbor base stations; combining the extracted value of the specific field with the reception strengths to thereby obtain combined values, and selecting a maximum value among the combined values; and transmitting a handover (handoff) request message to a base station corresponding to the selected maximum value. The system includes an MS that analyzes information about neighbor stations received in a Mobile Neighbor Base-station Advertisement (MOB_NBR_ADV) message to select a target RAS.

Abstract: In a photograph and image compression system equipped with a camera, a low luminance noise cancellation algorithm is selectively applied to photographs and video images including a low luminance noise, by determining whether the low luminance noise is included in a portion of an input image, and if it is determined that low luminance noise is included, the low luminance noise cancellation algorithm is executed on the input image.

Abstract: Provided is an access point grouping method to be performed in a high speed mobile environment and a communication system using the access point grouping method. A system capacity may be improved by grouping users having different movement speeds with respect to various channel environments classified based on existence of an LOS channel, and by performing beamforming. Channel information with respect to a user moving at a high speed may not be required, and thus overhead may be reduced.

Abstract: In a wireless data communication network, a mobile terminal is reconnected to a contents provider, when a connection established between the mobile terminal and the contents provider is interrupted or after a completion of the downloading of contents, by using return address information and contents address information including addresses of the contents provider and a web page including information relating to the downloaded contents, respectively. A WML (wireless markup language) script including the contents address information and the return address information is provided to the mobile terminal before initiating the downloading of the contents. In this way, the mobile terminal can easily be reconnected to the contents provider when the connection established between the mobile terminal and the contents provider is interrupted due to network congestion or the mobile terminal leaving the service coverage area.

Abstract: Disclosed herein are systems and methods for evaluating video quality. The systems include a video transmitter and a video receiver. The transmitter generates feature parameters from a reference video to be transmitted and transmits the generated feature parameters along with compressed video data via a network. The video receiver receives the feature parameters and the compressed video data via the network, evaluates the video quality of the received video using the feature parameters and transmits video quality evaluation results to the video transmitter via the network.

Abstract: A retransmission apparatus using an IP multicasting method for a DMB service including a plurality (n) of radio frequency (RF) receivers, each for receiving a DMB RF signal of a corresponding channel, a plurality (n) of DMB decoders, each for outputting a transport stream (TS) by decoding the DMB RF signal received from a corresponding RF receiver, a plurality (n) of slicers, each for processing the TS input from a corresponding DMB decoder; a plurality (n) of network interfacers, each for IP packetizing the TS sliced by a corresponding slicer; a network switch for receiving the IP packets from the plurality (n) of network interfacers, transferring the received IP packets to a multicasting processing unit, and receiving multicasting data from the multicasting processing unit, and the multicasting processing unit for receiving the IP packets from the network switch, creating a single piece of multicasting data by assigning multicasting addresses to the received IP packets, and outputting the created multicasti

Abstract: Methods and apparatuses for measuring transmission quality of multimedia data are provided. The method comprises the steps of a transmitter transmitting multimedia data through a channel, a receiver, having received the multimedia data from the transmitter, transmitting information on transmission error of the multimedia data to the transmitter through a return channel, the transmitter estimating the received data at the receiver using the error information returned to the transmitter, and the transmitter evaluating the transmission quality of the received data by comparing the estimated received data with reference data.

Abstract: A substrate support apparatus includes an upper plate supporting a substrate, a lower plate disposed under the upper plate, an insulating member interposed between the upper plate and the lower plate, an electrode interposed between the upper plate and the insulating member to direct plasma onto the substrate supported by the upper plate, and a heater interposed between the insulating member and the lower plate to heat the substrate supported by the upper plate. The insulating member includes a material having a volume resistance greater than or equal to about 106 ?-cm at a temperature of about 400° C. to about 800° C. so as to reduce a leakage current between the heater and the electrode.

Abstract: Disclosed is a method for extracting a region-of-interest of a user in a multimedia mobile terminal. The method includes: setting a search region in an input picture input to the multimedia mobile terminal on a screen picture-to-screen picture basis, and extracting a group of boundary of a region-of-interest based on a brightness difference between the set search region and an environment around the set search region; determining boundary coordinates of the region-of-interest through learning during a predetermined frame among the extracted group of boundary coordinate candidates; and enlarging the region-of-interest having the determined boundary coordinates, and displaying the enlarged region-of-interest. As a result, a region the user is most interested in or pays more attention to than other regions on a screen is automatically extracted.

Abstract: A device for protecting data stored in a static random access memory (SRAM) is provided. More particularly, a device for protecting SRAM data including an SRAM data erasing circuit, which erases memory stored in an SRAM at once when illegal separation from a system is detected. The device for protecting SRAM data includes: a power switching circuit for outputting electrical power supplied from an external power supply or a back-up battery power supply depending on whether the external power supply is supplying the electrical power or not; and an SRAM data erasing circuit for supplying the electrical power output from the power switching circuit to a power input terminal of a SRAM or grounding the power input terminal of the SRAM, in response to a connecter connection signal. The device can prevent illegal leakage of SRAM data by erasing the data stored in the SRAM when the SRAM is illegally separated from a system according to the switch setting of the SRAM data erasing circuit.

Abstract: A retransmission apparatus is provided that uses a packet method for a DMB service and includes: a DMB receiver for receiving DMB data from a medium; a DMB transmission mode release unit that outputs an MPEG-2 TS by releasing a DMB transmission mode in the DMB data received from the DMB receiver; a channel information extractor that extracts channel information contained in a Fast Information Channel (FIC) of the DMB data in the DMB transmission mode release process of the DMB transmission mode release unit; a data information extractor that receives the MPEG-2 TS from the DMB transmission mode release unit and extracts data information indicating a location of an elementary stream from the received MPEG-2 TS; a channel information database (DB) that stores the channel information extracted by the channel information extractor and the data information extracted by the data information extractor as channel data; a first IP streamer that IP-streams the MPEG-2 TS output from the data information extractor; and a

Abstract: Provided is a method and apparatus for processing a boundary strength (BS) by a deblocking filter, the method including: an encoding process for generating a packet including BS information; and a decoding process for receiving the packet including the BS information generated from the encoding process, and during the decoding process the BS information is used in a deblocking process.

Abstract: Provided are methods and apparatuses for coding a motion vector by a multimedia image codec. The method including: calculating and storing difference vectors which represent differences between adjacent motion vectors of image data; selecting a central axis of the stored difference vectors based on trend information of the difference vectors; transforming the difference vectors based on the central axis of the difference vectors; and performing bit coding using the axis-transformed difference vectors.