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    DUAL STREAM STRUCTURE DIGITAL TELEVISION TRANSMISSION AND RECEIVING METHOD USING HYBRID OF E-8VSSB, E-4VSB AND P2VSB
    31.
    发明专利
    DUAL STREAM STRUCTURE DIGITAL TELEVISION TRANSMISSION AND RECEIVING METHOD USING HYBRID OF E-8VSSB, E-4VSB AND P2VSB 未知

    公开(公告)号：CA2561185A1

    公开(公告)日：2006-01-12

    申请号：CA2561185

    申请日：2005-04-01

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04N7/015

    Abstract: Provided are a Vestigial Side Band (VSB) Digital Television (DTV) transmitte r and receiver based on the Advanced Television System Committee (ATSC) A/53, and a method thereof. The present invention provides 8-VSB DTV transmitter a nd receiver that can improve reception performance of the receiver by transmitting and receiving robust data mixed with P-2VSB, E-4 VSB, and/or E- 8 VSB. The DTV transmitter includes an input means for receiving a digital vid eo data stream including normal data and robust data; an encoding means for coding the digital video data stream into data symbols; and a transmitting means for modulating and transmitting an output signal of the encoding means , wherein the encoding means performs trellis coding on the robust data by mixing and using a plurality of methods.

    REPETIDOR DISTRIBUIDO Y METODO DE REPETICION DISTRIBUIDA DEL MISMO.
    34.
    发明专利
    REPETIDOR DISTRIBUIDO Y METODO DE REPETICION DISTRIBUIDA DEL MISMO. 未知

    公开(公告)号：MX2009005722A

    公开(公告)日：2009-06-08

    申请号：MX2009005722

    申请日：2007-11-30

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04L25/20

    Abstract: Se proporciona un repetidor distribuido para repetir señales de salida idénticas a las señales de entrada a través de un canal diferente al de las señales de transmisión principales, pero idéntico a los canales de otros repetidores distribuidos y un método de repetición distribuida del mismo. El repetidor distribuido incluye: Una unidad de pre-procesamiento configurada para recibir una señal de radiofrecuencia (RF) transmitida desde de un dispositivo externo y desmodular la señal de RF en una señal de banda base; un ecualizador configurado para ecualizar la señal de banda base para corregir una distorsión que ocurre en un canal de transmisión; una unidad de inserción y generación de señal de identificación configurada para generar una señal de identificación para identificación del repetidor distribuido y acondicionamiento de red e insertar la señal de identificación en la señal de banda base ecualizada; y una unidad de post-procesamiento configurado para convertir la señal de banda base de la unidad de inserción y generación de señal de identificación en una señal de RF y enviar la señal de RF.

    ON-CHANNEL REPEATER AND ON-CHANNEL REPEATING METHOD
    35.
    发明专利
    ON-CHANNEL REPEATER AND ON-CHANNEL REPEATING METHOD 未知

    公开(公告)号：CA2686925A1

    公开(公告)日：2008-11-20

    申请号：CA2686925

    申请日：2007-11-09

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04B7/14

    Abstract: Provided is an on-channel repeater, which removes feedback signals caused due to low isolation of transmission/reception antennas and a method thereo f. The on-channel repeater includes : a receiver for receiving radio frequen cy (RF) signals and converting them into baseband signals; a subtractor for subtracting replicas of feedback signals from the baseband signals to thereb y produce signals whose feedback signals are primarily removed; a demodulato r for demodulating the signals which include the remaining feedback signals; an equalizer for equalizing the demodulated signals to thereby produce equa lized signals; a transmitter for modulating the equalized signals to thereby produce modulated signals, converting the modulated signals into RF signals , and transmitting the RF signals in the air; a down-converter for down-conv erting the RF signals into baseband signals; and a replica generator for cal culating the replicas based on the baseband signals of the down- converter a nd the signals without feedback signals of the subtractor, and feeding back them to the subtractor.

    OPTIMAL TCM CODEC SEARCH METHOD FOR DUAL STREAM SYSTEMS, AND ENCODER/DECODER USING THE SAME
    36.
    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：CA2614866A1

    公开(公告)日：2007-01-18

    申请号：CA2614866

    申请日：2006-07-11

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04N7/24

    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.

    DIGITAL TELEVISION TRANSMISSION AND RECEIVING APPARATUS AND METHOD USING 1/4 RATE CODED ROBUST DATA
    37.
    发明专利
    DIGITAL TELEVISION TRANSMISSION AND RECEIVING APPARATUS AND METHOD USING 1/4 RATE CODED ROBUST DATA 未知

    公开(公告)号：CA2579502A1

    公开(公告)日：2006-03-23

    申请号：CA2579502

    申请日：2005-09-15

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04N7/12 ,  H04N5/00 ,  H04N7/24

    Abstract: Provided is a Vestigial Side Band Digital Television (DTV) transmitter/receiver based on Advanced Television System Committee A/53. The invention provides DTV transmitter/receiver having a dual stream structure through generation of robust data which has a transmission rate a fourth as fast as that of normal data, and a method thereof. The DTV transmitter includes: input means for receiving digital video data stream including normal and robust data; encoding means for performing ¼ rate coding on the digital video data stream so that one bit can be transmitted through two symbols; and transmitting means for modulating/transmitting output signals of the encoding means. This invention can reduce SNR and satisfy TOV of robust data by performing additional FEC on robust data, transmitting/receiving ¼ rate coded robust data, which are capable of transmitting one-bit data for two symbols, and improving decoding ability of an equalizer and a trellis decoder of a DTV receiver.

    APPARATUS AND METHOD FOR ANALYZING IDENTIFICATION SIGNAL BASED ON PARTIAL CORRELATION
    38.
    发明专利
    APPARATUS AND METHOD FOR ANALYZING IDENTIFICATION SIGNAL BASED ON PARTIAL CORRELATION 未知

    公开(公告)号：CA2668058C

    公开(公告)日：2016-03-29

    申请号：CA2668058

    申请日：2007-10-12

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： PARK SUNG-IK ,  LEE JAE-YOUNG ,  SEO JAE-HYUN ,  EUM HO-MIN ,  KIM HEUNG-MOOK ,  LIM JONG-SOO ,  LEE SOO-IN

    IPC: H04B7/14

    Abstract: Provided is an apparatus and method for analyzing identification (ID) signals by converting radio frequency (RF) signals which are transmitted with an ID signal added thereto by a transmitting part, e.g., a plurality of transmitters or repeaters, into signals of a desired band; creating ID signals that are identical to the ID signals added to the RF signals; calculating correlation values between the converted signals and the created ID signals based on partial correlation; and extracting channel profile of multi-path signals caused by a channel between the transmitting part and the ID signal analyzing apparatus from the correlation value. The technology of the present research is applied to broadcasting and communication.

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