| Patent application number | Description | Published |
|---|
| 20080240295 | APPARATUS FOR RECOVERING CARRIER WAVE IN DIGITAL BROADCASTING RECEIVER AND METHOD THEREFOR - An apparatus for recovering carrier wave in digital broadcasting receiver and a method therefore are disclosed which are capable of easily detecting and correcting frequency offsets of carrier wave without recourse to a pilot signal in a digital broadcasting receiver receiving a broadcasting signal of vestigial sideband (VSB) modulation system, thereby recovering the carrier wave, wherein, to this end, a complex sine wave whose central frequency is 1/n the symbol frequency is multiplied to generate a real component and imaginary Offset Quadrature Amplitude Modulation (OQAM) signals to calculate a phase error value from the real and imaginary component OQAM signals, to generate a complex sine wave compensating the calculated phase error value, to multiply the complex sine wave by the complex signal outputted from the phase splitter and to convert the complex signal to a baseband signal whose frequency offset is corrected. | 10-02-2008 |
| 20090129509 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD - A receiving system and data processing method therein are disclosed, by which mobile service data is received and processed. The receiving system comprises a tuner, a filter, an IQ mismatch processor, a gain controller and a demodulator. The tuner tunes radio frequency (RF) signals of a specific channel which includes mobile service data and main service data, converts the tuned RF signals into zero IF signals and outputs the converted zero IF signals. The filter performs low pass filtering for the zero IF signals output from the tuner. The IQ mismatch processor estimates and compensates IQ mismatch generated in the zero IF signals filtered by the filter. The gain controller controls gain of the zero IF signals by estimating a gain error of the zero IF signals output from the IQ mismatch processor. The demodulator performs carrier recovery and timing recovery by receiving the zero IF signals output from the gain controller. | 05-21-2009 |
| 20100272189 | DTV TRANSMITTING SYSTEM AND RECEIVING SYSTEM AND METHOD OF PROCESSING BROADCAST DATA - A digital television transmitting system includes a frame encoder, a block processor, a group formatter, and a multiplexer. The frame encoder forms an enhanced data frame and encodes the data frame for error correction and for error detection. The block processor further encodes the encoded data frame at a rate of ½ or ¼, and the group formatter divides the encoded data frame into a plurality of enhanced data blocks and maps the divided data blocks into a plurality of enhanced data groups, respectively. The multiplexer multiplexes the enhanced data groups with main data. | 10-28-2010 |
| 20100278276 | DTV TRANSMITTER AND METHOD OF CODING DATA IN DTV TRANSMITTER - A DTV transmitter includes a pre-processor expanding original enhanced data, a data formatter generating enhanced data packets including the expanded enhanced data and inserting known data place holders into the data packets, a multiplexer multiplexing the enhanced data packets with main data packets including main data, and an RS encoder adding systematic RS parity data to each main data packet and adding non-systematic RS parity data holders to each enhanced data packet. It further includes a data interleaver interleaving the RS-coded data packets, a known data generator generating know data symbols, a converter converting the interleaved data packet into symbols, and a symbol processor processing the converted symbols. The symbol processor removes symbols representing the null data, encodes symbols representing the original enhanced data at a rate of N/M, and replaces symbols representing the know data place holders with known data symbols. | 11-04-2010 |
| 20100281345 | DTV TRANSMITTER AND METHOD OF CODING MAIN AND ENHANCED DATA IN DTV TRANSMITTER - A DTV transmitter includes a pre-processor pre-processing enhanced data, a data formatter generating enhanced data packets including the pre-processed data and inserting known data place holders to the data packets, and a multiplexer multiplexing the enhanced data packets with main data packets. It further includes an RS encoder which RS-codes the multiplexed data packets, and a data interleaves which interleaves the RS-coded data packets. The RS encoder adds systematic RS parity data to each main data packet and adds non-systematic RS parity place holders to each enhanced data packet. The RS encoder adds the RS parity place holders such that the RS parity place holders are placed after the enhanced data within each interleaved enhanced data packet. | 11-04-2010 |
| 20100281346 | DTV TRANSMITTER AND METHOD OF CODING MAIN AND ENHANCED DATA IN DTV TRANSMITTER - A DTV transmitter includes a pre-processor pre-processing enhanced data, a data formatter generating enhanced data packets including the pre-processed data and inserting known data place holders to the data packets, and a multiplexer multiplexing the enhanced data packets with main data packets. It further includes an RS encoder which RS-codes the multiplexed data packets, and a data interleaves which interleaves the RS-coded data packets. The RS encoder adds systematic RS parity data to each main data packet and adds non-systematic RS parity place holders to each enhanced data packet. The RS encoder adds the RS parity place holders such that the RS parity place holders are placed after the enhanced data within each interleaved enhanced data packet. | 11-04-2010 |
| 20110007837 | DTV RECEIVER AND METHOD OF PROCESSING BROADCAST SIGNAL IN DTV RECEIVER - A DTV receiver includes a tuner tuning to a channel to receive a broadcast signal, and a demodulator demodulating the broadcast signal. The receiver further includes a first decoder which decodes main and enhanced data included in the demodulated signal by calculating soft decision values for the enhanced data and hard decision values for the main data. The receiver further includes a second decoder for decoding the main and enhanced data for first forward error correction, and a third decoder for decoding the FEC-decoded enhanced data for second forward error correction. | 01-13-2011 |
| 20110035648 | DTV TRANSMITTER AND METHOD OF CODING MAIN AND ENHANCED DATA IN DTV TRANSMITTER - A DTV transmitter includes a pre-processor pre-processing enhanced data, a data formatter generating enhanced data packets including the pre-processed data and inserting known data place holders to the data packets, and a multiplexer multiplexing the enhanced data packets with main data packets. It further includes an RS encoder which RS-codes the multiplexed data packets, and a data interleaver which interleaves the RS-coded data packets. The RS encoder adds systematic RS parity data to each main data packet and adds non-systematic RS parity place holders to each enhanced data packet. The RS encoder adds the RS parity place holders such that the RS parity place holders are placed after the enhanced data within each interleaved enhanced data packet. | 02-10-2011 |
| 20110085622 | DTV RECEIVER AND METHOD OF PROCESSING BROADCAST SIGNAL IN DTV RECEIVER - A DTV receiver includes a tuner tuning to a channel to receive a broadcast signal, and a demodulator demodulating the broadcast signal. The receiver further includes a first decoder which decodes main and enhanced data included in the demodulated signal by calculating soft decision values for the enhanced data and hard decision values for the main data. The receiver further includes a second decoder for decoding the main and enhanced data for first forward error correction, and a third decoder for decoding the FEC-decoded enhanced data for second forward error correction. | 04-14-2011 |
| 20110162066 | PASSWORD PROCESSING METHOD AND APPARATUS - A password processing method is provided. According to an embodiment, an object is displayed, and moved in at least one direction according to the user's motion. The password is processed in accordance with a combination of motions of the object in the at least one direction. | 06-30-2011 |
