Single Or Vestigial Sideband Or Suppressed Carrier Patents (Class 375/301)
  • Patent number: 10057009
    Abstract: A method of processing broadcast data in a broadcast transmitting system, the method includes randomizing, by a hardware processor, the broadcast data; first encoding, by the hardware processor, the randomized broadcast data to add first parity data for first forward error correction; second encoding, by the hardware processor, the first-encoded broadcast data to add second parity data for second forward error correction; permuting the second-encoded broadcast data; block interleaving, by the hardware processor, the permuted broadcast data; third encoding signaling information for signaling the broadcast data to add parity data; fourth encoding the third-encoded signaling information at a code rate; block interleaving the fourth-encoded signaling information; modulating the block-interleaved broadcast data and the block-interleaved signaling information; and transmitting a broadcast signal including the modulated broadcast data and the modulated signaling information.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: August 21, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyoung Gon Lee, In Hwan Choi, Byoung Gill Kim, Won Gyu Song, Jong Moon Kim, Jin Woo Kim
  • Patent number: 9178536
    Abstract: A DTV transmitting system includes an encoder, a randomizer, a block processor, a group formatter, a deinterleaver, and a packet formatter. The encoder codes enhanced data for error correction, permutes the coded data, and further codes the permuted data for error detection. The randomizer randomizes the coded enhanced data, and the block processor codes the randomized data at an effective coding rate of 1/H. The group formatter forms a group of enhanced data having data regions, and inserts the coded enhanced data into at least one of the data regions. The deinterleaver deinterleaves the group of enhanced data, and the packet formatter formats the deinterleaved data into corresponding data bytes.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: November 3, 2015
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyoung Gon Lee, In Hwan Choi, Kook Yeon Kwak, Jong Moon Kim, Won Gyu Song, Byoung Gill Kim, Jin Woo Kim
  • Patent number: 8848831
    Abstract: An apparatus comprises a direct digital synthesizer, a mixer having first and second input ports and an output port, and a numerically-controlled oscillator. The direct digital synthesizer has a first output coupled to the first input port of the mixer and a second output coupled to a control input of the numerically-controlled oscillator, and the numerically-controlled oscillator has an output coupled to the second input port of the mixer. The mixer provides a quadrature modulated signal at its output port, and the first and second outputs of the direct digital synthesizer control respective portions of the quadrature modulated signal. For example, the first and second outputs of the direct digital synthesizer may control respective amplitude and phase portions of the quadrature modulated signal.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 30, 2014
    Assignee: LSI Corporation
    Inventor: Roger A. Fratti
  • Patent number: 8824529
    Abstract: A signal transmission system includes: a transmitting section including a first carrier signal generating section configured to generate a carrier signal for modulation and a first frequency converting section configured to generate a transmission signal by frequency-converting a transmission object signal by the carrier signal for modulation, the carrier signal for modulation being generated by the first carrier signal generating section; and a receiving section including a second carrier signal generating section configured to generate a carrier signal for demodulation and a second frequency converting section configured to frequency-convert the transmission signal received by the carrier signal for demodulation, the carrier signal for demodulation being generated by the second carrier signal generating section.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: September 2, 2014
    Assignee: Sony Corporation
    Inventors: Satoshi Fukuda, Kenichi Kawasaki, Satoru Shinke
  • Patent number: 8761298
    Abstract: A method and apparatus for transmitting and/or receiving a signal in a multiple input multiple output (MIMO) system are provided. An apparatus for transmitting a signal in a multiple input multiple output (MIMO) system includes an input unit to receive NT symbol streams in parallel, where NT is an integer greater than or equal to 2, a multiple signal generating unit to generate NT multiple signals having a transmit diversity gain by applying a cyclic delay of a different pattern to each of the NT symbol streams, and a multiple signal providing unit to provide the generated NT multiple signals to NT transmit antennas, respectively, based on a predetermined transmit antenna index of each of the NT transmit antennas.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: June 24, 2014
    Assignees: Samsung Electronics Co., Ltd., Postech Academy-Industry Foundation
    Inventors: Jong Bu Lim, Ui Kun Kwon, Chan Ho Choi, Gi Hong Im
  • Patent number: 8750803
    Abstract: A method, apparatus, system, and computer program product example embodiments of the invention are disclosed to reduce interference of predictive signal transmissions between wireless devices. In an example embodiment, a wireless receiver is configured to receive a composite signal, wherein the composite signal includes at least a beacon component comprising a regular beacon symbol. The wireless receiver is configured to determine from the beacon component, a predicted reception of a predicted future beacon symbol, using a known beacon transmission pattern. The wireless receiver is configured to cancel from the composite signal a future received beacon symbol, based at least partly on the predicted future beacon symbol.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: June 10, 2014
    Assignee: Nokia Corporation
    Inventor: Markus Nentwig
  • Patent number: 8717147
    Abstract: Disclosed are a passive RFID (Radio Frequency Identification) system and method capable of recognizing a great deal of tags at a high speed. A reader of a passive RFID system, including: a processor dividing slots and subchannels to configure a round, recognizing subchannels that are not involved in a collision and interference by the slots, and changing the subchannels that are not involved in a collision and interference, into a sleep state; a transmission unit encoding a command generated through the processor, performing an amplitude jitter modulation on the encoded command, and transmitting the modulated command; and a reception unit acquiring and demodulating tag signals received through a plurality of subchannels by the slots, and providing the demodulated tag signals to the processor.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: May 6, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Ji Hoon Bae, Cheng Hao Quan, Dong Han Lee, Chan Won Park, Won Kyu Choi, Kwang Soo Cho, Man Sik Park, Gil Young Choi, Jong Suk Chae
  • Patent number: 8699600
    Abstract: A frequency and data synchronization control system through the 8VSB SFN DTx modulation prevents the deterioration of the digitally broadcasted receiving sensitivity caused by a discrepancy of the frequency or data between the receiver of the digital broadcasting signal and the distributed translator or between distributed translators.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: April 15, 2014
    Assignee: K-Tech Telecommunications, Inc
    Inventor: Steve Kuh
  • Patent number: 8699622
    Abstract: Methods for discontinuing interference-filter pre-coding of 8-VSB digital television (DTV) signals during ancillary-service transmissions are disclosed that do not disrupt reception of main-service DTV signals by receivers already in use. Receivers are disclosed for receiving ancillary-service transmissions without interference-filter pre-coding, which receivers include adaptive channel-equalization filters and subsequent decoders for CCC. The subsequent decoders for CCC respond to data slicing of adaptive channel-equalization filter responses that avoid the reduction of signal-to-noise ratio (SNR) caused by post-comb filtering. Certain of these M/H receivers employ selective post-comb-filtering to flatten the frequency spectrum of main-service components of received 8-VSB DTV signals, while leaving the frequency spectrum of M/H-service components of received 8-VSB DTV signals as received. This is done to generate signal from which filter coefficients for the channel-equalization filters are determined.
    Type: Grant
    Filed: January 3, 2011
    Date of Patent: April 15, 2014
    Inventor: Allen LeRoy Limberg
  • Patent number: 8611431
    Abstract: An implementation exits a power saving mode for fixed and periodic active periods of time to receive a separate burst transmission from a first stream during each of the corresponding active periods of time. The first stream is received at a first-stream burst data rate. The first stream includes data configured to be displayed at a first playback rate that is substantially less than the first-stream burst data rate. During the active periods of time, data is received from a second stream at a second-stream rate. The second stream includes data configured to be displayed at a second playback rate that is substantially the same as the second-stream rate. After receiving each of the burst transmissions from the first stream during the active periods of time, the power saving mode is entered for corresponding fixed and periodic power-saving periods of time while waiting for another burst from the first stream.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: December 17, 2013
    Assignee: Thomson Licensing
    Inventors: Benyuan Zhang, Wen Gao, Kumar Ramaswamy, Paul Gothard Knutson, Joshua Lawrence Koslov, Manoj Viswambharan, Yik Chung Wu
  • Patent number: 8582689
    Abstract: An apparatus for transmitting data in a communication system includes: a processor configured to process broadcasting data regarding various types of digital broadcasts to be provided to users; an S/P converter configured to convert additional data of the broadcasting data into a parallel type; a phase selector configured to generate a phase selection value using additional data bits, except for a first additional data bit, of the converted parallel-type additional data; a sequence generator configured to generate a sequence using the first additional data bit and the phase selection value; and an adder configured to couple the generated sequence with the processed broadcasting data.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: November 12, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Ik Park, Heung-Mook Kim, Wangrok Oh, Donghoon Kang
  • Patent number: 8572648
    Abstract: A receiving system and a data processing method are disclosed. The receiving system includes a receiving unit, a demodulator, a first handler, and a second handler. The receiving unit receives a broadcast signal including fast information channel (FIC) data, mobile service data, and a service signaling channel, the FIC data including a field indicating that a table signaling service guide bootstrap information to the service signaling channel is included therein, and the mobile service data and the service signaling channel are packetized into an RS frame belonging to a desired ensemble. The demodulator demodulates the received broadcast signal. The first handler acquires service guide bootstrap information from the table included in the service signaling channel. And, the second handler accesses a service guide announcement channel by using the service guide bootstrap information.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: October 29, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jae Hyung Song, Jin Pil Kim, Jong Yeul Suh, Chul Soo Lee, In Hwan Choi
  • Patent number: 8526482
    Abstract: Systems for transmitting information symbols utilize ternary codes or pivot codes in conjunction with spread spectrum encoding. The systems comprise at least a first symbol source for supplying an information signal comprising at least a first stream of I,Q bit pairs, means for using either a ternary code or at least one pivot code for spreading the at least first stream of I,Q bit pairs and thereby respectively forming first chips and second chips, and a radio signal modulator for transmitting the first chips and second chips over a radio interface.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: September 3, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Paul Wilkinson Dent
  • Patent number: 8526542
    Abstract: A diversity receiver configured to receive digital signals, including a first modulator configured to receive a first signal and modulate the first signal to first data, a second modulator configured to receive a second signal and modulate the second signal to second data, a path aligner configured to detect starting points of the first data and the second data and generate a control signal for synchronizing the first data and the second data, and an equalizer/decoder configured to synchronize the first and second data and to generate a signal to noise ratio and an equalizer output by a recursive equalization operation for the diversity signals thus synchronized.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: September 3, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: DoHan Kim, Sergey Zhidkov, Beom kon Kim
  • Patent number: 8494083
    Abstract: An apparatus and method for transmitting digital broadcast signal are provided. The apparatus includes a group formatter to format a data group including mobile service data, where the group formatter further maps the mobile service data into a data group of interleaved format, adds N training sequences into a corresponding location of the data group of interleaved format, adds signaling data into the data group of interleaved format, inserts place holder bytes for MPEG header and non-systematic Reed-Solomon (RS) parity into the data group of interleaved format, and deinterleaves the mobile service data in the data group of interleaved format, a non-systematic RS encoder to non-systematic RS encode the mobile service data in the formatted data group and insert non-systematic RS parity obtained from the non-systematic RS encoding into the formatted data group.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: July 23, 2013
    Assignee: LG Electronics Inc.
    Inventors: Hyoung Gon Lee, Byoung Gill Kim, Won Gyu Song, In Hwan Choi, Jin Woo Kim
  • Patent number: 8494081
    Abstract: The present invention aims to provide a transmission device that, in a communication system using multilevel modulation with 2^n levels (n being an integer greater than or equal to two), limits the run length to a predetermined value or less and guarantees DC balance. The transmission device, which transmits data to which 2^n amplitude modulation has been applied, separates data for transmission into n data sequences; encodes one of the n data sequences to guarantee run length, thereby generating a converted data sequence; generates an intermediate data sequence by either inverting or not inverting a specific data sequence so that, based on candidate data, the next output voltage guarantees DC balance; and applies 2^n amplitude modulation to n-bit symbols each of which has a bit in the intermediate data sequence as a most significant bit and bits in the remaining data sequences, excluding the specific data sequence, as subsequent bits.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: July 23, 2013
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Takahashi, Toshiaki Ohnishi, Kazuhiro Ando
  • Patent number: 8488667
    Abstract: A digital television (DTV) transmitter includes a first randomizer randomizing enhanced data; a Reed-Solomon (RS) frame encoder generating an RS frame; a block processor encoding data in the RS frame, outputting data symbols, interleaving the data symbols, and converting the interleaved data symbols into data bytes; a group formatting unit mapping the data bytes into data groups; a deinterleaver deinterleaving data of the data groups; a packet formatter outputting enhanced data packets; a multiplexer multiplexing the enhanced data packets with main data packets; a second randomizer randomizing the multiplexed main data packets and MPEG header data in the multiplexed enhanced data packets; a Reed-Solomon (RS) encoder RS encoding the multiplexed enhanced data packets; an interleaver interleaving data of the RS-encoded data packets; and a trellis encoding unit trellis encoding the interleaved data.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: July 16, 2013
    Assignee: LG Electronics Inc.
    Inventors: Sung Ryong Hong, In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Young Jin Hong
  • Patent number: 8472544
    Abstract: A digital television (DTV) transmitter and a method of coding data in the DTV transmitter method are disclosed. A pre-processes enhanced data by coding the enhanced data for forward error correction (FEC) and expanding the FEC-coded enhanced data. A data formatter generates enhanced data packets including the pre-processed enhanced data and inserting known data to at least one of the enhanced data packets. A first multiplexer multiplexes main data packets with the enhanced data packets, and a data randomizer randomizes the multiplexed data packets. A Reed-Solomon (RS) encoder RS-codes the randomized data packets by adding first parity data, and a data interleaver interleaves the RS-coded data packets. A trellis encoder trellis-encodes the interleaved data packets, wherein the trellis encoder may be initialized when a known data sequence is inputted thereto.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: June 25, 2013
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Kyung Won Kang, Kook Yeon Kwak, Young Jin Hong, Sung Ryong Hong
  • Patent number: 8458752
    Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: June 4, 2013
    Assignee: LG Electronics Inc.
    Inventors: Chang Sik Yun, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Won Gyu Song, Jin Pil Kim, Jong Moon Kim, Jin Woo Kim, Byoung Gill Kim
  • Patent number: 8451934
    Abstract: A method and system for increasing the throughput of a wireless channel that sends different data on different multi-path components. The channel can be pre-mapped or dynamically mapped, and the different transmissions can be modulated by different complexity signals such as adaptive quadrature amplitude modulation (AQAM). Each multipath component is coded with a signature that will allow it to be separated at a receiver that has an omni-directional antenna. Common signature techniques can be offset PN codes, orthogonal spreading vectors, orthogonal alphabets and other signature techniques. The received channels can be combined for an overall increase in data-rate or used separate as multiplexed data.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: May 28, 2013
    Inventors: Clifford Kraft, Vasilios D. Dossas
  • Patent number: 8416864
    Abstract: A method and modem are provided for obtaining an optimized efficiency of an Orthogonal Frequency Division Multiplex (OFDM) data transmission, such as for power line communication, for example. The length or duration of a guard interval or cyclic prefix in an OFDM symbol is newly selected at each start-up of a modem while initializing or preparing the OFDM data transmission. The length of the guard interval can be given by the number of samples in a time-discrete representation, and the value of such number of samples that is retained for the subsequent data transmission can be selected from a plurality of pre-determined possibilities based on an evaluation of a channel quality of a communication channel including a physical line to which the modem is connected. Hence, the selected value depends on actual transmission conditions, and the optimization potential offered by a more flexible handling of system parameters is exploited to meet changing conditions on the physical line.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: April 9, 2013
    Inventors: Dmitri Korobkov, Patrick Langfeld, Vladimir Potapov, Christian Leeb, Hans-Joerg Maag, Hans Benninger, Stefan Ramseier
  • Patent number: 8416882
    Abstract: In an exemplary embodiment, an active vector generator is configured to generate a composite vector with controlled phase and amplitude, where the active vector generator generates the composite vector with independent variable phase control and independent variable amplitude control. Furthermore, in another exemplary embodiment, an active vector generator is configured to generate a unique number of phase states and configured to generate a unique number of amplitude states. Specifically, an exemplary active vector generator comprises a digital-to-analog converter (DAC) configured to set the phase of the composite vector, a current multiplying switch network configured to control the amplitude of the composite vector, a variable current multiplier configured to adjust the amplitude of the composite vector, and a differential adder configured to control the quadrant of the composite vector and generate the composite vector.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: April 9, 2013
    Assignee: ViaSat, Inc.
    Inventors: David W. Corman, Jennifer Kitchen
  • Patent number: 8344818
    Abstract: A single sideband mixer is constructed with digital logic elements such as T-type flip-flops and inverters and with FETs, and the resulting mixer circuit simultaneously improves control over the frequency resolution, noise floor and operating frequency range. The use of this group of elements also allows the mixer circuit to be easily realized in an integrated circuit.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: January 1, 2013
    Assignee: Scientific Components Corporation
    Inventor: Doron Gamliel
  • Patent number: 8315314
    Abstract: An implementation provides a transmitter that separates sequential portions of data in a first set of data by time intervals allowing a power saving mode (1005). The transmitter transmits the sequential portions of data separated by respective time intervals having lengths configured to allow a receiver to enter and exit a power saving mode between receiving sequentially transmitted portions of data from the first set of data (1010). The transmitter separates sequential portions of data in a second set by time intervals that are not of sufficient length to allow a receiver to enter and exit a power saving mode during the time intervals (1015). The second set of data is then transmitted (1020).
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: November 20, 2012
    Assignee: Thomson Licensing
    Inventors: Paul Gothard Knutson, Kumar Ramaswamy, Joshua Lawrence Koslov, Manoj Viswambharan, Benyuan Zhang, Wen Gao, Yik Chung Wu
  • Patent number: 8311141
    Abstract: Different sets symbols are precluded at prescribed times in time-dependent trellis coding. This increases the distances between different individual symbols as well as the distances between trellis codes, which increases the robustness of data transmission. The symbols that are precluded in this time-dependent trellis coding are determined in advance according to a prescribed pattern, which pattern does not depend on the history of previous symbols. The Viterbi decoder used for trellis decoding in a receiver can be designed to take advantage of knowledge concerning which different sets of symbols are precluded at prescribed times.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: November 13, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Allen LeRoy Limberg
  • Patent number: 8270533
    Abstract: A transmitter for transmitting data in a communication system includes: a serial/parallel (S/P) conversion unit configured to convert data into an I signal and a Q signal; multiplication units configured to multiply the converted I and Q signals by orthogonal sequences, respectively; conversion units configured to Hilbert-transform the I and Q signals multiplied by the orthogonal sequences; addition units configured to add the I and Q signals multiplied by the orthogonal sequences and the Hilbert-transformed Q and I signal, respectively; and an intermediate frequency (IF)/radio frequency (RF) unit configured to up-convert the added I signal and the added Q signal and transmit the converted I and Q signals.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: September 18, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Ik Park, Hyoungsoo Lim, Heung-Mook Kim, Donghoon Kang, Wangrok Oh
  • Patent number: 8254706
    Abstract: An E8-VSB reception system, apparatus for generating data attribute and method thereof, and apparatus for channel encoding and method thereof are disclosed. In the present invention, E8-VSB data resulting from multiplexing a plurality of enhanced data encoded at different coding rates with main data is received. And, the main data and a plurality of the enhanced data are identified to be modulated from the received E8-VSB data. In particular, by generating M/E packet attribute information, enhanced packet attribute information, enhanced byte attribute information and E8-VSB symbol attribute information from the E8-VSB data attribute generating apparatus, the channel decoding apparatus can correctly identify to decode the main data, ½ enhanced data and ¼ enhanced data from one another.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: August 28, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Kyung Won Kang
  • Patent number: 8199839
    Abstract: A digital broadcast transmitting/receiving system and a signal processing method thereof that can improve the receiving performance of the system. A digital broadcast transmitter has a randomizer to randomize an input data stream which has null bytes being inserted at a specified position, a multiplexer to output a data stream formed by inserting specified known data into the position of the null bytes of the randomized data stream, an encoder to encode the data stream outputted from the multiplexer, and a modulator/RF-converter to modulate the encoded data, RF-convert the modulated data and transmit the RF-converted data. The receiving performance of the digital broadcast transmitting/receiving system can be improved even in a multi-path channel by detecting the known data from the received signal and using the known data in synchronization and equalization in a digital broadcast receiver.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-joo Jeong, Yong-deok Chang
  • Patent number: 8175193
    Abstract: 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.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: May 8, 2012
    Assignee: LG Electronics Inc.
    Inventor: Jae Hyung Kim
  • Publication number: 20120106677
    Abstract: A method of transmitting a broadcast signal in a transmitter includes transmitting a transmission frame including a plurality of slots during which data groups of mobile data are transmitted, the mobile data being encoded through a Reed-Solomon (RS) frame and each row of a payload of the RS frame including a transport packet of the mobile data.
    Type: Application
    Filed: January 11, 2012
    Publication date: May 3, 2012
    Applicant: LG ELECTRONICS INC.
    Inventors: Sang Hyup LEE, In Hwan CHOI, Jeong Woo KIM, Chul Soo LEE, Jae Hyung SONG
  • Patent number: 8165227
    Abstract: A method of modulation, which is applied to a communication system transmitting data in one frequency band using at least two orthogonal subcarriers, is disclosed. The present invention includes the steps of adding information bits indicating an amplitude reference and a phase reference to an input bit sequence by a specific time interval unit and carrying out differential amplitude phase shift keying (DAPSK) on the input bit sequence using the amplitude and phase references. The present invention prevents the waste of power and bandwidth due to insertion of a plurality of pilot toes in the related art 1?-QAM system.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: April 24, 2012
    Assignee: LG Electronics Inc.
    Inventors: Youn Woo Yun, Ki Jun Kim
  • Patent number: 8155238
    Abstract: A device for processing data which is to be transmitted by radio, with the data to be transmitted being in the form of a digital baseband signal (DAT1), has a filter unit (301) for pulse shaping and oversampling of the digital baseband signal (DAT1), a predistortion unit (302, 303) for predistortion of the filtered and oversampled digital baseband signal (DAT2), and a control unit (304, 313) for controlling the predistortion unit (302, 303) as a function of the digital baseband signal (DAT1).
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: April 10, 2012
    Assignee: Intel Mobile Communications GmbH
    Inventors: Jan-Erik Müller, Nazim Ceylan
  • Patent number: 8149951
    Abstract: A digital broadcast system including a broadcast receiving system and data processing method are disclosed. In the broadcast receiving system receiving broadcast signals, the broadcast receiving system includes a transmission parameter decoding unit, a known sequence detector, and a burst controller. The transmission parameter decoding unit detects information on a burst of a received signal from broadcast data having main service data and mobile service data multiplexed therein within a field of the received signal and outputs the detected information on the burst. The known sequence detector receives burst information from the transmission parameter decoding unit and uses the received burst information and known data position information included in the received data, so as to output burst control information. The burst controller uses the burst control information to control power supply of the broadcast receiving system.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: April 3, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jong Moon Kim, In Hwan Choi, Kook Yeon Kwak, Byoung Gill Kim, Won Gyu Song, Jin Woo Kim, Hyoung Gon Lee
  • Patent number: 8149755
    Abstract: A digital broadcast system and a method of processing data disclose. A receiving system of the digital broadcast system may include a baseband processor, a management processor, and a presentation processor. The baseband processor receives broadcast signals including mobile service data and main service data. The mobile service data configures a RS frame, and the RS frame includes the mobile service data and at least one type of channel setting information on the mobile service data. The management processor decodes the RS frame to acquire the mobile service data and the at least one type of channel setting information on the mobile service data, then extracts position information of an SDP message. Herein, the SDP message includes Codec information for each component in the respective virtual channel from the channel setting information, thereby accessing the SDP message from the extracted position information and gathers SDP message information.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: April 3, 2012
    Assignee: LG Electronics Inc.
    Inventors: Jae Hyung Song, In Hwan Choi, Jong Yeul Suh, Jin Pil Kim, Choon Lee, Chul Soo Lee
  • Patent number: 8130873
    Abstract: A carrier recovery apparatus usable with a VSB receiver and a method thereof. The carrier recovery apparatus is capable of recovering a carrier even though a pilot signal may be corrupted due to multi-path characteristics of a channel. Accordingly, the carrier recovery apparatus performs a BECM (Band Edge Component Maximization) algorithm on upper and lower sidebands of a received signal to generate phase information therefrom. The phase information is combined in a combiner. Since the BECM algorithm is performed on the upper and lower sidebands, it is possible to execute the carrier recovery even through the upper sideband of a received signal may be corrupted. Therefore, the carrier recovery apparatus can prevent performance degradation of the VSB receiver caused by corruption in the pilot signal.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: March 6, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-hoon Lee
  • Patent number: 8130833
    Abstract: A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the supplemental data to be transmitted, a null sequence inserter for inserting a null sequence to an interleaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the null sequence inserted therein, a multiplexer for multiplexing an MPEG data coded with the supplemental data having the MPEG header added thereto in a preset multiplexing ratio and units. The output of the multiplexer is provided to an 8T-VSB transmission system for modulating a data field from the multiplexer and transmitting the modulated data field to a VSB reception system.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: March 6, 2012
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 8121213
    Abstract: A modulation apparatus is disclosed that enables significant improvements in signal transmission rate in a limited frequency band as compared with conventional modulation schemes. The modulation apparatus has first and second frequency-increasing single side band (SSB) modulators. The modulators are configured to have respective carrier frequencies with a difference by a frequency corresponding to the symbol frequency (i.e. fundamental frequency of the input symbol). An adder combines a lower side band (LSB) signal obtained from the SSB modulator set for a higher carrier frequency, and an upper side band (USB) signal obtained from the SSB modulator set for a lower carrier frequency to obtain a modulation signal.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: February 21, 2012
    Assignee: Panasonic Corporation
    Inventors: Genichiro Ota, Daichi Imamura, Keiji Takakusaki, Mitsuru Uesugi
  • Patent number: 8059718
    Abstract: A VSB communication system or transmitter for processing supplemental data packets with MPEG-II data packets includes a VSB supplemental data processor and a VSB transmission system. The VSB supplemental data processor includes a Reed-Solomon coder for coding the supplemental data to be transmitted, a null sequence inserter for inserting a null sequence to an interleaved supplemental data for generating a predefined sequence, a header inserter for inserting an MPEG header to the supplemental data having the null sequence inserted therein, a multiplexer for multiplexing an MPEG data coded with the supplemental data having the MPEG header added thereto in a preset multiplexing ratio and units. The output of the multiplexer is provided to an 8T-VSB transmission system for modulating a data field from the multiplexer and transmitting the modulated data field to a VSB reception system.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: November 15, 2011
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Young Mo Gu, Kyung Won Kang, Kook Yeon Kwak
  • Patent number: 8014333
    Abstract: A digital broadcast system and a method of processing data disclose. A receiving system of the digital broadcast system may include a baseband processor, a management processor, and a presentation processor. The baseband processor receives broadcast signals including mobile service data and main service data. The mobile service data configures a RS frame, and the RS frame includes the mobile service data and at least one type of channel setting information on the mobile service data. The management processor decodes the RS frame to acquire the mobile service data and the at least one type of channel setting information on the mobile service data, then extracts position information of an SDP message. Herein, the SDP message includes Codec information for each component in the respective virtual channel from the channel setting information, thereby accessing the SDP message from the extracted position information and gathers SDP message information.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: September 6, 2011
    Assignee: LG Electronics, Inc.
    Inventors: Jae Hyung Song, In Hwan Choi, Jong Yeul Suh, Jin Pil Kim, Choon Lee, Chul Soo Lee
  • Patent number: 8005304
    Abstract: An E8-VSB reception system, apparatus for generating data attribute and method thereof, and apparatus for channel encoding and method thereof are disclosed. In the present invention, E8-VSB data resulting from multiplexing a plurality of enhanced data encoded at different coding rates with main data is received. And, the main data and a plurality of the enhanced data are identified to be modulated from the received E8-VSB data. In particular, by generating M/E packet attribute information, enhanced packet attribute information, enhanced byte attribute information and E8-VSB symbol attribute information from the E8-VSB data attribute generating apparatus, the channel decoding apparatus can correctly identify to decode the main data, ½ enhanced data and ¼ enhanced data from one another.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: August 23, 2011
    Assignee: LG Electronics Inc.
    Inventors: In Hwan Choi, Kyung Won Kang
  • Patent number: 8005166
    Abstract: 8VSB-compatible DTV broadcasting that employs outer coding of a sort in which interleaved data and outer coding parity are inner coded by the ? trellis code encoder is improved. This is done by recoding each successive pair of bits in the interleaved data and outer coding parity in accordance with an “anti-Gray” code before being inner coded by the ? trellis code encoder. Accordingly, in the DTV receiver an adjacent-bin error during data slicing may generate a double-bit error in a pair of bits as ? trellis decoded, but this is reduced to a single-bit error after the pair of bits is recoded in accordance with a Gray coding procedure. In one example of such recoding, 10 and 11 bit-pairs of the interleaved data and outer coding parity are recoded to 11 and 10 bit-pairs respectively, but the 00 and 01 bit-pairs are not recoded.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: August 23, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Allen LeRoy Limberg
  • Patent number: 7966633
    Abstract: A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.
    Type: Grant
    Filed: March 19, 2010
    Date of Patent: June 21, 2011
    Assignee: LG Electronics Inc.
    Inventors: Chang Sik Yun, In Hwan Choi, Kook Yeon Kwak, Hyoung Gon Lee, Won Gyu Song, Jin Pil Kim, Jong Moon Kim, Jin Woo Kim, Byoung Gill Kim
  • Patent number: 7949072
    Abstract: A single sideband mixer circuit includes a voltage controlled oscillator operable a tunable frequency f1. The mixer circuit outputs a frequency signal at a frequency f1±f2. A tracking filter operates to filter the frequency signal and generate a first output signal at the frequency f1±f2. A resonance frequency fr of the tracking filter is tunable to substantially match the frequency f1±f2 of the frequency signal. The output signal of the tracking filter may be processed by a phase lock loop circuit to generate a control signal for controlling the setting of the tunable frequency f1 and resonance frequency fr. Alternatively, the output signal of the tracking filter may be divided and the divided signal processed by a phase lock loop circuit to generate the control signal for controlling setting of the tunable frequency f1 and resonance frequency fr.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: May 24, 2011
    Assignee: ST-Ericsson SA
    Inventors: Ivan Krivokapic, Thierry Divel
  • Publication number: 20110110462
    Abstract: A digital broadcast receiving system and a method for controlling the same are disclosed. The method a method for controlling a digital broadcast receiving system includes the steps of receiving a broadcast signal having mobile service data and main service data multiplexed therein, extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data, acquiring a program table, by using the IP signaling channel within an ensemble included in the received broadcast signal, and controlling the system to create a list of channels mapped with all ensembles transmitted through at least one physical frequency, by using the acquired program table.
    Type: Application
    Filed: January 14, 2011
    Publication date: May 12, 2011
    Inventors: Sang Hyup LEE, In Hwan CHOI, Jeong Woo KIM, Chul Soo LEE, Jae Hyung SONG
  • Patent number: 7941735
    Abstract: A digital broadcasting transmission system processes dual transport stream (TS) including multi turbo streams. The digital broadcasting transmission system includes a turbo processor to detect a turbo stream from a dual transport stream (TS) which includes a multiplexed normal stream and a turbo stream, encoding the detected turbo stream and stuffing the encoded turbo stream into the dual TS; and a transmitter to trellis-encode the processed dual TS, and to output the resultant stream, wherein the turbo processor encodes the turbo stream using a plurality of turbo processors. Accordingly, a plurality of turbo streams may be processed in parallel.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: May 10, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hae-joo Jeong, Jung-pil Yu, Yong-sik Kwon, Eui-jun Park, Joon-soo Kim, Jong-hun Kim, Kum-ran Ji, Jin-hee Jeong
  • Publication number: 20110103514
    Abstract: A transmitter for transmitting data in a communication system includes: a serial/parallel (S/P) conversion unit configured to convert data into an I signal and a Q signal; multiplication units configured to multiply the converted I and Q signals by orthogonal sequences, respectively; conversion units configured to Hilbert-transform the I and Q signals multiplied by the orthogonal sequences; addition units configured to add the I and Q signals multiplied by the orthogonal sequences and the Hilbert-transformed Q and I signal, respectively; and an intermediate frequency (IF)/radio frequency (RF) unit configured to up-convert the added I signal and the added Q signal and transmit the converted I and Q signals.
    Type: Application
    Filed: July 29, 2010
    Publication date: May 5, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung-Ik PARK, Hyoungsoo Lim, Heung-Mook Kim, Donghoon Kang, Wangrok Oh
  • Patent number: RE42643
    Abstract: At the transmitter side, carrier waves are modulated according to an input signal for producing relevant signal points in a signal space diagram. The input signal is divided into, two, first and second, data streams. The signal points are divided into signal point groups to which data of the first data stream are assigned. Also, data of the second data stream are assigned to the signal points of each signal point group. A difference in the transmission error rate between first and second data streams is developed by shifting the signal points to other positions in the space diagram expressed at least in the polar coordinate system. At the receiver side, the first and/or second data streams can be reconstructed from a received signal. In TV broadcast service, a TV signal is divided by a transmitter into low and high frequency band components which are designated as first and second data streams respectively.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: August 23, 2011
    Assignee: Panasonic Corporation
    Inventors: Mitsuaki Oshima, Seiji Sakashita
  • Patent number: RE45668
    Abstract: A digital television (DTV) transmitter and a method of coding data in the DTV transmitter are disclosed. A data formatter generates an enhanced data packet including the enhanced data and a known data sequence. A data randomizer randomizes the enhanced data packet. A RS encoder RS-codes the randomized data packet by adding first parity data, and a data interleaver interleaves the RS-coded data packet. A trellis encoding unit trellis-encodes the interleaved data packet. Herein the trellis encoding unit includes a TCM encoder for generating a first output bit by trellis-encoding a first input bit and generating a second output bit by bypassing the first input bit, and a pre-coder for generating a third output bit by pre-coding a second input bit, wherein memories included in the TCM encoder and the pre-coder are initialized when the known data sequence is inputted to the trellis encoding unit.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: September 8, 2015
    Assignee: LG ELECTRONICS INC.
    Inventor: In Hwan Choi
  • Patent number: RE46838
    Abstract: A digital television (DTV) receiving system includes a tuner, a demodulator, a known data detector, an equalizer, a transmission detector, and a block decoder. The tuner receives a DTV signal having a data frame in which main and mobile service data are multiplexed. The demodulator demodulates the DTV signal, and the known data detector detects known data included in the mobile service data. The equalizer equalizes the demodulated DTV signal using the detected known data, and the transmission parameter detector detects an error correction mode from the equalized DTV signal. Finally, the block decoder decodes the equalized DTV signal for error correction using the detected error correction mode.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: May 8, 2018
    Assignee: LG ELECTRONICS INC.
    Inventors: Hyoung Gon Lee, In Hwan Choi, Kook Yeon Kwak, Jong Moon Kim, Won Gyu Song, Byoung Gill Kim, Jin Woo Kim
  • Patent number: RE46883
    Abstract: A method of processing broadcast data in a broadcast transmitting system includes Reed-Solomon (RS) encoding and cyclic redundancy check (CRC) encoding enhanced data bytes; converting the RS-CRC encoded enhanced data bytes into enhanced data bits; encoding each of the converted enhanced data bits with one of a first coding rate and a second coding rate, thereby outputting data symbols; first interleaving the data symbols; converting the first interleaved data symbols into data bytes; forming a first data group including enhanced data corresponding to the converted data bytes; deinterleaving data of the first data group; outputting enhanced data packets including the deinterleaved data of the first data group; multiplexing the enhanced data packets with main data packets including main data; second interleaving data of the multiplexed data packets; and trellis encoding the second interleaved data.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: May 29, 2018
    Assignee: LG Electronics Inc.
    Inventors: Jong Moon Kim, In Hwan Choi, Byoung Gill Kim, Won Gyu Song, Jin Woo Kim, Hyoung Gon Lee