Abstract: A reproducing device is provided. The reproducing device includes: a driver configured to load a recording medium in response to the recording medium being attached, wherein the recording medium records video data and additional information encoded according to a High Efficiency Video Coding (HEVC) method; a data processor configured to process the video data; a controller configured to provide a service corresponding to the additional information. The service includes at least one of a trick play service, an interested region enlargement service, and an object adjusting service.

Abstract: A content processing apparatus is provided. The content processing apparatus includes an input unit which receives high resolution content, a data processor which generates a video frame by processing the high resolution content, and a controller which, if an output resolution of a display panel, which is to display the video frame, is lower than the resolution of the high resolution content, controls the data processor to form an object corresponding to the high resolution content as an object for low resolution and add the object for low resolution to the video frame.

Abstract: Provided is a recording medium reproducing device including a driver configured to load a recording medium storing video data, including a plurality of video frames, and additional information about the plurality of video frames included in a plurality of layers, respectively, when the recording medium is loaded therein; a user interface configured to receive a trick play command; a video processor which processes the video data; and a controller configured to select at least one layer to be decoded from among the plurality of layers based on a trick play speed determined according to the trick play command and the additional information, control the video processor to decode video frames of the selected layer, and performs a trick play corresponding to the trick play speed using the decoded video frames.

Abstract: A communication method for a mobile sensor node in a wireless sensor network includes: in a state that the mobile sensor node performs synchronization by a message reception interrupt from a parent sensor node and determines an uplink active duration and a downlink active duration, transmitting a message to the parent sensor node in the transmitting duration of the uplink active duration, receiving and processing messages from the parent sensor node and sensor nodes linearly connected around the parent sensor node in the receiving duration of the uplink active duration, and resetting a new parent sensor node using the received signal strength indications RSSIs of the received messages; and transmitting a message to the parent sensor node in the transmitting duration of the downlink active duration, checking whether or not a message is received from the parent sensor node in the receiving duration of the downlink active duration, if the message is not received from the parent sensor node, determining that time

Abstract: Provided are a double linked wireless sensor network capable of performing bidirectional communication and a method of transmitting and receiving data. In each of nodes constituting the wireless sensor network, an active duration and an inactive duration are alternately repeated, and the active duration is configured to include an upstream duration, an intermission duration, and a downstream duration. Each of the downstream duration and the upstream duration is configured to sequentially include a second receive slot, a second receive processing slot, a first receive slot, a first receive processing slot, a transmit slot, a transmit processing slot, a first acknowledge slot, a first acknowledge processing slot, a second acknowledge slot, and a second acknowledge processing slot, and wherein bidirectional communication can be performed between the sink node and the terminal node in a single period of the active duration.

Abstract: A routing method of a wireless network system is provided. Paths of the wireless network system are divided into down-stream and up-stream paths. The up-stream paths are reset for each period, or whenever a network is changed, or whenever transmission of data fails more than a predetermined number of times. Accordingly, it is possible to secure an average lifetime of a wireless network system by previously preventing a bottleneck from occurring at a specific node, increase a transmission speed of data by reducing the hop count to the sink node connected to the information collector, and reduce power consumption of a battery.

Abstract: Disclosed is a wireless sensor network with a linear structure capable of bidirectional communication. The wireless sensor network includes a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node, each node has an active period for transmitting/receiving data to/from its upper-level node and lower-level node, the active period includes a downstream duration for transmitting data/commands from the sink node to the terminal node and an upstream duration for transmitting data/commands from the terminal node to the sink node, and each of the upstream and downstream durations sequentially includes RX, TX, and ACK intervals, so that bidirectional communication between the sink node and the terminal node can be performed within a single active period.

Abstract: The present invention is to provide a method and apparatus for multiplexing a sync node and a gateway of a wireless sensor network, which is capable of allowing communication of the wireless sensor network to be normally performed by multiplexing paths of the sync node and the gateway of the wireless sensor network even in the case where any one of the sync node and the gateway abnormally operates and by transmitting upstream data and downstream data through a path selected among the duplexed paths according to characteristics of the wireless sensor network.

Abstract: Disclosed herein is a lap time measurement system. The lap time measurement system includes a management server and sensor nodes deployed at respective measurement points. Each of the sensor nodes includes a Global Positioning System (GPS) reception unit, a sensor unit for detecting whether a moving object has passed through a corresponding measurement point, a communication unit for transmitting and receiving data to and from the management server, and a control unit for updating an internal timer based on the time information, determining time data of the internal timer to be passage time data, and transmitting the determined passage time data. The management server receives the passage time data from the respective sensor nodes, calculates times at which the moving object has passed through the measurement points and lap times for respective measurement intervals based on the received passage time data, and provides the calculated times and calculated lap times.

Abstract: Provided is a wireless sensor network including: a plurality of sensor nodes connected linearly; a sink node connected to the uppermost node among the sensor nodes; a control server; a gateway connected between the sink node and the control server to transmit and receive data; and a plurality of relay gateways. In the case where the plurality of the sensor nodes are divided into a predetermined number of subgroups, the sensor nodes located at the highest levels in the divided subgroups and which are connected to the relay gateways are designated as relay nodes. In the case where an amount of data stored in the relay node exceeds a predetermined threshold value, the relay node transmits the stored data through the connected relay gateway to the control server. Accordingly, in the case where the data of the sensor nodes are increased, it is possible to minimize a problem in that the increased data are lost during transmission.

Abstract: Provided is a firmware updating method for a new node in a wireless sensor network including a plurality of nodes. The firmware updating method for the new node (a) a new node searching for neighbor nodes located within a predetermined distance; (b) the new node designating a parent node among the searched neighbor nodes; (c) in the case where the plurality of nodes include a join receiving state for joining the new node to the wireless sensor network, the designated parent node and the new node establishing a communication link by using the join receiving state; (d) the parent node transmitting firmware to the new node through the established communication link; and (e) the new node receiving the firmware from the parent node, updating existing firmware with the received firmware, and driving the updated firmware to be jointed to the wireless network.

Abstract: An underwater wireless communication system and method includes a sensor node for transforming measured underwater data into ultrasound signals, and transmitting the transformed ultrasound signals and receiving other ultrasound signals.

Abstract: A communication method for a mobile sensor node in a wireless sensor network includes: in a state that the mobile sensor node performs synchronization by a message reception interrupt from a parent sensor node and determines an uplink active duration and a downlink active duration, transmitting a message to the parent sensor node in the transmitting duration of the uplink active duration, receiving and processing messages from the parent sensor node and sensor nodes linearly connected around the parent sensor node in the receiving duration of the uplink active duration, and resetting a new parent sensor node using the received signal strength indications RSSIs of the received messages; and transmitting a message to the parent sensor node in the transmitting duration of the downlink active duration, checking whether or not a message is received from the parent sensor node in the receiving duration of the downlink active duration, if the message is not received from the parent sensor node, determining that time

Abstract: Disclose is a modulation method that transmits n bits per modulation symbol, comprising the steps of: (a) generating a constellation of which 2n constellation points are arranged to be angular point of equilateral triangle; (b) generating a modulation symbol by mapping the constellation point with digital signal. According to the present invention, average power consumed by constellation points can be reduced by using equilateral triangular constellation.