| Patent application number | Description | Published |
|---|
| 20080205537 | Method For Selecting Optimal Beam And Apparatus For Receiving Digital Broadcasting Signal Using The Same - There are provided a method for selecting an optimal beam to improve digital broadcasting receiving performance, and a digital broadcasting receiving apparatus using the same. The method includes the steps of: a) calculating a mainpath Signal to Multipath signal and Noise Ratio (SMNR) based on a channel impulse response for a plurality of beams which are formed according to steering directions from output signals of antennas, wherein the output signal of each antenna has different phase shift according to location of antenna element; b) selecting a predetermined number of beams having a high SMNR value by comparing the calculated SMNR value for respective beam; c) calculating a mainpath Signal to Dominant Multipath signal Ratio (SDMR) based on a channel impulse response corresponding to the selected beam; and d) selecting a beam output signal having the biggest SDMR value by comparing SDMR values calculated in selecting a predetermined number of beams. | 08-28-2008 |
| 20090320379 | Chemical Mechanical Polishing Pads Comprising Liquid Organic Material Encapsulated in Polymer Shell and Methods For Producing The Same - There is provided a chemical mechanical polishing (CMP) pad including a core of a polymer shell encapsulating a liquid organic material having one of a boiling point and a decomposition point of 130° C. or more in a polymer matrix, the CMP pad having open pores formed by the core on a polishing surface thereof, and a method of producing the CMP pad. The CMP pad having a high hardness and a high density improves polishing efficiency and flatness of a wafer and maintains a uniform size of the core, thereby producing pads having high polishing efficiency and stable polishing performance. | 12-31-2009 |
| 20100020874 | SCALABLE VIDEO DECODER AND CONTROLLING METHOD FOR THE SAME - A scalable video decoder and a controlling method thereof are provided. A method of controlling a scalable video decoder includes: determining whether a macro block mode of an upper layer is an interlayer prediction mode when decoding a scalable video; when the macro block mode of the upper layer is determined as the interlayer prediction mode, determining an up-sampling operation is required to thereby either perform texture up-sampling using corresponding macro block information of a lower layer and neighboring pixel information, or perform residual up-sampling using the corresponding macro block information of the lower layer; and decoding the upper layer using the texture up-sampling or the residual up-sampling. | 01-28-2010 |
| 20100146141 | TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD, RECEPTION APPARATUS OF DIGITAL BROADCASTING SIGNAL - The present invention relates to a method and apparatus for transmitting digital broadcasting signals and a method and apparatus for receiving digital broadcasting signals that divide a stream into a plurality of layers according to characteristics of the stream, that independently process the layers, and that dynamically allocate frequencies on the basis of the processed signals. A method of transmitting digital broadcasting signals includes dividing a single stream into a plurality of layers according to characteristics of the stream; performing encoding and mapping on each of the layers; and dynamically allocating a frequency to each of the layers on the basis of the number of symbols for each layer. | 06-10-2010 |
| 20100175096 | TRANSMISSION METHOD, TRANSMISSION APPARATUS, RECEPTION METHOD, RECEPTION APPARATUS OF DIGITAL BROADCASTING SIGNAL AND TRANSMISSION FRAME-FORM THEREOF - The present invention relates to a transmission method, a transmission apparatus, a reception method, and a reception apparatus of a digital broadcasting signal that can add frame header information to a front portion of a transmission frame in a transmission system for digital broadcasting to thereby determine a different transmission mode, modulation level, hierarchical modulation, error correction code, and the like for each temporally different transmission frame, and a transmission frame structure thereof. The transmission frame structure includes a frame header containing multiplexing information of the transmission frame, and a frame body containing data information associated with a service provided by the transmission frame. Also, the frame header may include a frame synchronization signal unit including synchronization signal information for extracting a start position of the transmission frame and a frame information unit including multiplexing information of data contained in the transmission frame. The multiplexing information denotes information associated with a transmission mode, a modulation level, a hierarchical modulation, and an error correction code of the data contained in the transmission frame. | 07-08-2010 |
| 20100220720 | DIGITAL BROADCASTING SIGNAL TRANSMITTING METHOD AND DEVICE, RECORDING MEDIUM THEREOF, AND RECEIVING DEVICE THEREOF - In a digital broadcasting signal transmission system, a transmission frame includes a frame body and a frame header, and the frame body is divided into a plurality of sub-bands in the frequency domain and is divided into a plurality of symbols in the time domain. The frame header is provided in the former part of the transmission frame and is transmitted with a signal in the time domain. The frame body includes a plurality of services, and the services respectively receive at least one sub-band and at least one symbol. The frame header includes information on the plurality of services, and information on the plurality of services includes information on the sub-band and the symbol to which the services are allocated, information on channel encoding levels of the services, and information on digital modulation levels of the services. | 09-02-2010 |
| 20100265996 | REPEATER AND METHOD FOR PROCESSING SIGNAL, AND METHOD FOR CONVERTING SYNCHRONOUS FREQUENCY THEREOF - A repeater having different input and output frequencies converts a signal received with the input frequency to a first intermediate frequency signal based on a local oscillating frequency for intermediate frequency conversion, and converts the first intermediate frequency signal to a second intermediate frequency signal by performing digital processing on the first intermediate frequency signal. Then, the repeater generates a first frequency tone signal that corresponds to a difference between the input and output frequencies, and generates a second frequency tone signal from the local oscillating frequency for intermediate frequency conversion and the first frequency tone signal. The repeater up-converts the second intermediate frequency signal to the output frequency based on the second frequency tone signal, and transmits the signal. | 10-21-2010 |
| 20100265997 | REPEATER AND METHOD FOR PROCESSING SIGNAL, AND METHOD FOR CONVERTING FREQUENCY THEREOF - A repeater converts a frequency of a received signal based on a local oscillating frequency and transmits a transmitting signal of a frequency that is different from the frequency of the received signal. Here, the local oscillating frequency includes a local oscillating error that may be different in a plurality of repeaters. Accordingly, the repeater cancels the local oscillating frequency error itself in a frequency conversion so that transmitting frequencies between the plurality of repeaters may be identical. | 10-21-2010 |
| 20100266052 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING ENHANCED MEDIA DATA IN DIGITAL MULTIMEDIA BROADCASTING SYSTEM - A method and apparatus for processing enhanced media data in a Digital Multimedia Broadcasting (DMB) system is provided. The apparatus for processing enhanced media data includes: a base layer processing unit configured to multiplex an elementary stream of a base layer and perform channel encoding for the multiplexed elementary stream of the base layer; an enhancement layer processing unit configured to synchronize an elementary stream of an enhancement layer with the elementary stream of the base layer and thereby multiplex the elementary stream of the enhancement layer and process the elementary stream of the enhancement layer to be transmittable via at least one of a plurality of transmission channels; and a synchronizer configured to provide the enhancement layer processing unit with synchronization information that is used for synchronizing the elementary stream of the enhancement layer with the elementary stream of the base layer. | 10-21-2010 |
| 20110069763 | SCALABLE VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR INCREASING IMAGE QUALITY OF BASE LAYER - Provided are a scalable video encoding/decoding method and apparatus, which may improve an image quality of a base layer while not using an anti-aliasing filter. The scalable video decoding apparatus includes an entropy decoding unit to decode an image received from an encoding apparatus, a de-blocking filter to reduce a block distortion of the decoded image, a motion compensation unit to apply a motion compensation scheme to an image passing through the de-blocking filter, a half-pel filter to apply a half-pel compensation scheme to an image where the motion compensation scheme is applied by the motion compensation unit, and an output unit to output an image where the half-pel compensation scheme is applied by the half-pel filter. | 03-24-2011 |
| 20110111694 | ON-CHANNEL REPEATING APPARATUS AND METHOD - An on-channel repeating apparatus and method is provided. The method includes subtracting a replica of a feedback signal from a signal received from a main transmitter or another repeating apparatus; demodulating and equalizing the signal to remove noise, a multipath signal, and the remaining feedback signal from the signal; inserting identification signal having good correlation properties into the signal; modulating the signal; and transmitting the modulated signal. | 05-12-2011 |
