Abstract: A broadcasting signal transmitting apparatus that transmits a plurality of signals through a plurality of antennas to increase a data transmission rate. The broadcasting signal transmitting apparatus includes a signal generator configured to generate the plurality of signals each of which includes at least one preamble symbol and data symbols, a frequency allocator configured to allocate a first subcarrier position of a whole frequency to a first preamble symbol included in a first signal among the plurality of signals and to allocate, by shifting a frequency position of the first subcarrier position by a preset interval, a second subcarrier position to a second preamble symbol included in a second signal among the plurality of signals, and a transmitter configured to transmit the plurality of signals through the plurality of antennas. The antennas respectively correspond to subcarrier positions allocated to the plurality of signals.

Abstract: A transmitting apparatus includes a symbol generator configured to generate a preamble symbol including signaling data and a reference signal, a frequency allocator configured to allocate first subcarriers and second subcarriers to the signaling data and the reference signal, respectively, in a frequency corresponding to the preamble symbol and map the signaling data and the reference signal to the allocated subcarriers, and a transmitter configured to transmit a signal including the preamble symbol and a data symbol, wherein the reference signal is a signal used for channel estimation or frequency offset compensation. Thus, synchronization is accurately corrected and channel estimation is achieved using the reference signal included in the preamble symbol, thereby reducing a ratio of a pilot included in a data symbol.

Abstract: A method and an apparatus for encoding, transmitting, and receiving signaling information in a broadcasting/communication system are provided. The method includes generating the signaling information which comprises a plurality of pieces; determining a number of coded blocks to which the signaling information is to be encoded, based on a number of bits of the signaling information and a number of encoder input information bit; segmenting each piece of the signaling information based on the number of the coded blocks; constructing input information bits of each coded block to include segmented parts of each piece of the signaling information; encoding the input information bits to each coded block; and transmitting each coded block.

Abstract: Provided is a stretchable substrate, an electronic apparatus, and a method of manufacturing the electronic apparatus. The stretchable substrate includes a base part, first parts extruded from the base part, and second parts disposed between two adjacent first parts. The second parts have top surfaces positioned lower than the top surfaces of the first parts, and have wrinkles with random distribution.

Abstract: Disclosed herein is a shape-variable optical element including: a shape-variable lens; a first electrode unit configured to be connected to the shape-variable lens; a second electrode unit configured to face the first electrode unit; and a deformation part configured to be disposed between the first electrode unit and the second electrode unit.

Abstract: There is provided an optical imaging device including a flexible image sensor and an actuator that expands or contracts the flexible image sensor on a two-dimensional plane. It is possible to minimize distortion aberration and control a viewing angle and magnification.

Abstract: A method and apparatus for transmitting and receiving a preamble having sequence information for an OFDM system is provided. The preamble transmission method includes generating a preamble block including at least one frame having a header with a known sequence and a code block containing control information and transmitting the preamble block mapped to Orthogonal Frequency Division Multiplexing (OFDM) cells by repeating in frequency axis direction.

Abstract: Provided herein is an artificial muscle capable of being miniaturized, realizing precision movement, and performing selective relaxation/contraction deformation according to the power output necessary in the muscle, the muscle including a first operation unit that includes electro-active polymer where relaxation-deformation occurs based on electric energy being applied; a heating unit that generates heat energy based on the electric being applied; a second operation unit that has a yarn structure and where contraction-deformation occurs based on the heat energy generated in the heating unit; and a control unit that applies electric energy to the first operation unit and the heating unit.

Abstract: An apparatus and method for providing signaling information using inband transmission in a digital video broadcasting system where a frame for transmitting broadcasting data according to a ground-wave broadcasting service and broadcasting data according to a mobile broadcasting service is generated, and the generated frame is transmitted with an additional area for recording recognition information that indicates whether signaling information to be transmitted in the generated frame or the frame to be transmitted next time has been changed is allocated to a signaling information field of the generated frame.

Abstract: A transmitter includes: a frame generator configured to generate a frame including a frame starting symbol, at least one data symbol and a frame closing symbol; a pilot and reserved tone inserter configured to insert pilots and reserved tones in at least one of the frame starting symbol, the data symbol and the frame closing symbol such that positions of the reserved tones do not overlap positions of the pilots in the at least one of the frame starting symbol, the data symbol and the frame closing symbol; and a transmitter configured to transmit the frame in which the pilots and the reserved tones are inserted, wherein the reserved tones are not used to transmit data in the frame.

Abstract: An active diffuser for reducing a speckle in accordance with an embodiment of the present invention includes: an electroactive polymer film having at least one or more scattering patterns; a first transparent electrode coated on one surface of the electroactive polymer film; and a second transparent electrode coated on the other surface of the electroactive polymer film, and a shape of the scattering pattern of the electroactive polymer film is varied by voltage applied through the first transparent electrode and the second transparent electrode.

Abstract: A method for transmitting and receiving broadcast signals in a radio broadcasting communication system is provided together with an associated apparatus. The transmitting method includes creating a frame having a preamble slot, a data slot and a control slot, and sending the created frame. The control slot has information for assigning the data slot to one of an uplink and a downlink. The receiving method includes receiving such a frame wherein the control slot has scheduling information for each user, and extracting the data slot from the received frame by using the scheduling information in the control slot. These methods may realize an interactive broadcasting by separately employing broadcast signals for the uplink and downlink.

Abstract: An apparatus and method for configuring a broadcast service data in a digital broadcasting communication system are provided. The method includes mapping a first zone, corresponding to broadcast service data of a first type, and a second zone, corresponding to broadcast service data of a second type, in a frame individually. Preferably, the broadcast service data included in the first zone and the second zone is sliced into sub-slices according to a different number of service slicings for each zone.

Abstract: A transmitter and receiver of a broadcast signal and corresponding methods are provided. The transmitter includes: a preamble symbol inserter configured to insert a preamble symbol including a synchronization part and an information part into a frame; and a transmitting unit configured to transmit the frame including the preamble symbol. The synchronization part includes a plurality of first sequences for measuring frequency offset of the preamble symbol, and the information part includes a plurality of second sequences for measuring a phase shift amount of the information part.

Abstract: Provided herein are an optical zoom lens capable of actively zooming in and/or out and an apparatus using the same. The optical zoom lens may include an electro-active polymer layer configured to be deformable in response to an electric signal; a lens structure formed over the electro-active polymer layer; a first electrode formed on an upper surface of the electro-active polymer layer; a second electrode formed on a lower surface of the electro-active polymer layer; and a control circuit unit configured to apply a voltage to the first electrode and the second electrode. The optical zoom lens, having a structure of a combination of the polymer lens structure and the electro-active polymer actuator, is able to embody active variation in position of the polymer lens structure body and control therefor using deformation of the electro-active polymer layer by an electric signal.

Abstract: Apparatus and method for receiving a frame including control information in a broadcasting system are provided. A frame for a broadcast service is received and includes at least one Physical Layer Pipe (PLP) and indication information for indicating a change/no-change of control information for the broadcast service in the next frame. Indication information, which includes information on a position in which the control information will change, is extracted from the frame and used to determine the position in which the control information will change.

Abstract: Apparatus and method for transmitting and receiving a frame including control information in a broadcasting system are provided. A frame for a broadcast service is generated including at least one Physical Layer Pipe (PLP) and indication information for indicating a change/no-change of control information for the broadcast service in the next frame. The indication information includes information on a position in which the control information will change.

Abstract: An auto focusing lens includes an active lens including a lens body including electroactive polymer and a transparent electrode at least partially coated on a surface of the lens body, and a controller controlling the focus of the active lens by applying a voltage to the transparent electrode.

Abstract: The present disclosure relates to an imaging apparatus and a method for operating the same, and more particularly, to a high-speed lens moving technique capable of effective multi-view angle and multi-focus images for a short period of time and an image photographing and sorting technique according the high-speed lens moving technique. Accordingly, the movement of lenses is performed using a new technique without applying the existing slow lens moving technique performed using a motor, etc., so that it is possible to acquire multi-view angle and multi-focus images using one imaging apparatus for a short period of time.

Abstract: There are provided an image processing apparatus and a control method thereof. An image processing apparatus includes an image sensor for acquiring a target image, an image processing module for performing focusing on a specific area of the acquired target image and determining a focal surface of the target image on the basis of the performed focusing, and a drive control module for controlling the curvature of the image sensor, based on the determined focal surface.