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    OPTIMAL TCM CODEC SEARCH METHOD FOR DUAL STREAM SYSTEMS, AND ENCODER/DECODER USING THE SAME
    3.
    发明专利
    OPTIMAL TCM CODEC SEARCH METHOD FOR DUAL STREAM SYSTEMS, AND ENCODER/DECODER USING THE SAME 未知

    公开(公告)号：CA2614866C

    公开(公告)日：2014-02-18

    申请号：CA2614866

    申请日：2006-07-11

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SUNG-HOON ,  LEE JAE-YOUNG ,  KIM SEUNG-WON ,  LEE SOO-IN ,  AHN CHIETEUK ,  LEE HO-KYOUNG ,  KIM CHANG-JOONG

    IPC: H04N7/66 ,  H03M13/25

    Abstract: Provided is a method for searching for an optimal coder suitable to a dual stream transmission method of a DTV transceiving apparatus, and an encoder and a decoder employing the optimal coder searching method. The optimal coder searching method includes the steps of: a) determining a mixed pattern of normal stream and robust stream; b) determining a trellis structure of the robust stream which is applied to the mixed pattern based on how coders are connected; c) forming a dual stream trellis by mixing a trellis of the normal stream, which is a normal stream trellis, and a trellis of the robust stream, which is a robust stream trellis; d) computing a free distance at departing points of the dual stream trellis structure based on a dual stream free distance computation termination condition; and e) determining the optimal coder based on the free distance.

    APPARATUS AND METHOD FOR CORRESPONDING FREQUENCY SYNCHRONIZATION IN ON-CHANNEL REPEATER
    4.
    发明专利
    APPARATUS AND METHOD FOR CORRESPONDING FREQUENCY SYNCHRONIZATION IN ON-CHANNEL REPEATER 未知

    公开(公告)号：CA2564044C

    公开(公告)日：2013-08-06

    申请号：CA2564044

    申请日：2005-05-12

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： EUM HO-MIN ,  LEE YONG-TAE ,  KIM SEUNG-WON ,  KIM HEUNG-MOOK ,  SEO JAE-HYUN ,  PARK SUNG-IK ,  LEE SOO-IN

    IPC: H04N7/015 ,  H04H1/00 ,  H04H3/00 ,  H04H20/67 ,  H04H20/72

    Abstract: Provided is a frequency synchronizing apparatus and method that can synchronize frequencies between receiving signals and transmitting signals by extracting a carrier error and sampling timing error information in a synchronization process of the receiving signal from a main transmitter or another repeater and reflecting them in the transmitting signal in an on-channel repeater. The apparatus includes a carrier recovery means for compensating a carrier frequency error of a receiving signal; a timing recovery means for compensating a sampling timing error of the receiving signal; a carrier error reflecting means for reflecting the carrier frequency error extracted from the carrier recovery means to a transmitting signal; and a timing error reflecting means for reflecting the sampling timing error extracted from the timing recovery means to the transmitting signal. The present invention is used to form an on-channel repeating network in any transmission system including a digital television broadcasting system.

    DIGITAL TELEVISION TRANSMITTER AND RECEIVER FOR USING 16 STATE TRELLIS CODING
    5.
    发明专利
    DIGITAL TELEVISION TRANSMITTER AND RECEIVER FOR USING 16 STATE TRELLIS CODING 未知

    公开(公告)号：CA2561183C

    公开(公告)日：2012-01-24

    申请号：CA2561183

    申请日：2005-04-01

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SUNG-HOON ,  JI KUM-RAN ,  LEE JAE-YOUNG ,  KIM SEUNG-WON ,  LEE SOO-IN ,  AHN CHIETEUK

    IPC: H04N7/015

    Abstract: Provided are a Vestigial Side Band (VSB) Digital Television (DTV) transmitter and receiver based on the Advanced Television System Committee (ATSC) A/53, and a method thereof. The present invention provides 8-VSB DTV transmitter and receiver that can improve reception performance of the receiver by transmitting and double streams formed of normal data and robust data without increasing an average power level, regardless of the ratio of the normal data and robust data, by including an encoding unit for performing 16-state trellis coding on the robust data when a data stream includes robust data, and a method thereof.

    TRANSMISION DE TELEVISION DIGITAL CON ESTRUCTURA DE FLUJO DUAL Y METODO PARA SU RECEPCION USANDO EL HIBRIDO DE E-8VSB, E-4VSB Y P-2VSB.
    6.
    发明专利
    TRANSMISION DE TELEVISION DIGITAL CON ESTRUCTURA DE FLUJO DUAL Y METODO PARA SU RECEPCION USANDO EL HIBRIDO DE E-8VSB, E-4VSB Y P-2VSB. 未知

    公开(公告)号：MXPA06011264A

    公开(公告)日：2007-01-16

    申请号：MXPA06011264

    申请日：2005-04-01

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SUNG-HOON ,  KIM SEUNG-WON ,  JI KUM-RAN ,  AHN CHIETEUK ,  LEE SOO-IN ,  LEE JAE-YOUNG

    IPC: H04N7/015

    Abstract: Se proporcionan un transmisor y un receptor de Television Digital (DTV) de Banda Lateral Residual (VSB) basados en el A/53 del Comite de Sistema de Television Avanzado (ATSC) y un metodo para los mismos. La presente invencion proporciona un transmisor y un receptor DTV de 8-VSB que puede mejorar el funcionamiento de la recepcion del receptor mediante transmitir y recibir los datos robustos mezclados con P-2VSB, E-4VSB y/o E-8VSB. El transmisor DTV incluye un medio de entrada para recibir un flujo de datos de video digitales incluyendo los datos normales y los datos robustos, un medio de codificacion para codificar el flujo de datos de video digitales y un medio de transmision para modular y transmitir una senal de salida de los medios de codificacion, en donde los medios de codificacion realizan la codificacion trellis de los datos robustos mediante mezclar y usar una pluralidad de metodos.

    APPARATUS AND METHOD OF ON-CHANNEL REPEATER
    7.
    发明专利
    APPARATUS AND METHOD OF ON-CHANNEL REPEATER 未知

    公开(公告)号：CA2605834A1

    公开(公告)日：2006-11-02

    申请号：CA2605834

    申请日：2005-12-29

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM HEUNG-MOOK ,  SEO JAE-HYUN ,  KIM SEUNG-WON ,  LEE SOO-IN ,  EUM HO-MIN ,  PARK SUNG-IK ,  LEE YONG-TAE

    IPC: H04B7/14

    Abstract: Provided are an on-channel repeater and a method thereof. The on-channel repeater can extract reception channel information from signals transmitted from a main transmitter or another repeater, compensate for channel distortion caused on a transmission channel by inversely reflecting the extracted reception channel information to the received signals, and transmit the channel-distortion compensated signals through the same channel as a reception channel, and a method thereof. The on-channel repeater includes: a receiver for receiving RF signals transmitted from outside; a down-converter for down-converting the received RF signals into signals of a desired band; a channel-estimator for estimating an inverse value of a reception channel based on the down-converted signals; an adaptation filter for compensating for channel distortion by using a filter having the inverse value of the estimated reception channel; an up-converter for up-converting the channel distortion-compensated signals into RF signals; and a transmitter for transmitting the up-converted RF signals.

    KALMAN-VITERBI JOINT CHANNEL EQUALIZER
    10.
    发明专利
    KALMAN-VITERBI JOINT CHANNEL EQUALIZER 未知

    公开(公告)号：AU2003225385A1

    公开(公告)日：2003-11-03

    申请号：AU2003225385

    申请日：2003-04-17

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： SIM YONG-HUN ,  KIM SEUNG-WON ,  AHN CHIETEUK ,  KIM DAE-JIN ,  KIM SUNG-HOON

    IPC: H04N7/015 ,  H04L25/03 ,  H04N5/21 ,  H04N5/44 ,  H04N7/12

    Abstract: In a channel equalizer applicable to a digital television receiver, a forward filter and a backward filter perform filtering to an input signal and a predetermined signal. A Viterbi decoder corrects errors during a transmission procedure in a blind mode. A training symbol storing block stores training symbols. An output signal of the Viterbi decoder and symbols are provided to the backward filter in accordance with a blind mode or a training mode. A Kalman gain is calculated in a Kalman gain calculating block and an error signal is calculated by comparing an equalized signal, symbols, and the output signal of the Viterbi decoder with one another. A tap coefficient is updated by using the calculated error signal and the Kalman gain.

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