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    TRANSMISOR Y RECEPTOR DE TELEVISION DIGITAL PARA USAR UNA CODIFICACION TRELLIS DE 16 ESTADOS.
    41.
    发明专利
    TRANSMISOR Y RECEPTOR DE TELEVISION DIGITAL PARA USAR UNA CODIFICACION TRELLIS DE 16 ESTADOS. 未知

    公开(公告)号：MXPA06011267A

    公开(公告)日：2007-01-26

    申请号：MXPA06011267

    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 ,  JAE-YOUNG-LEE

    IPC: H04N7/015 ,  H04N11/24

    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 flujos dobles formados de datos normales y datos robustos sin incrementar un nivel de energia promedio, sin importar la proporcion de los datos normales y los datos robustos, mediante incluir una unidad de codificacion para realizar la codificacion trellis de 16 estados codificando los datos robustos cuando un flujo de datos incluye datos y un metodo para los mismos.

    APPARATUS AND METHOD FOR RECEIVING DIGITAL TELEVISION SIGNALWITH BACKWARD COMPATIBILITY BYTE
    43.
    发明专利
    APPARATUS AND METHOD FOR RECEIVING DIGITAL TELEVISION SIGNALWITH BACKWARD COMPATIBILITY BYTE 未知

    公开(公告)号：CA2561182A1

    公开(公告)日：2006-01-12

    申请号：CA2561182

    申请日：2005-04-01

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04N7/12

    Abstract: Provided are a Vestigial Side Band (VSB) digital television (DTV) receiver based on is A/53 of the Advanced Television System Committee (ATSC) that can secure backward compatibility of a low-ranked DTV receiver by using parity bytes added to robust data for error correction and obtain RS coding gain fr om the robust data, and a method thereof. The DTV receiver includes: a receivin g unit for receiving a transmission signal including general data and robust data and converting the transmission signal into a base-band signal; an equalizer for determining a symbol level of the transmission signal; a trell is decoder for performing trellis decoding on a symbol of the determined level; a nonsystematic Reed Solomon (NRS) decoder for performing NRS decoding on the trellis-decoded robust data and correcting an error; and a restoring unit fo r restoring a digital video data stream with respect to the trellis-decoded general data and the NRS-decoded robust data.

    APPARATUS AND METHOD OF ON-CHANNEL REPEATER
    45.
    发明专利
    APPARATUS AND METHOD OF ON-CHANNEL REPEATER 未知

    公开(公告)号：CA2564236A1

    公开(公告)日：2005-11-17

    申请号：CA2564236

    申请日：2004-12-31

    Applicant: KOREA ELECTRONICS TELECOMM

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

    IPC: H04N7/015 ,  H04B7/155 ,  H04L25/03 ,  H04L25/24 ,  H04N5/21 ,  H04N5/38

    Abstract: Provided are an on-channel repeater and a method thereof. The repeater receives signals on one channel and distributes the signals on the same channel by converting RF signals from a main transmitter into baseband signals; equalizing them in a high-performance equalizer; adding a repeater identifier to them; modulating the baseband signals with the repeater identifier into RF signals. The repeater includes: a receiver for receiving RF signals; a demodulator for demodulating the RF signals into baseband signals ; an equalizer for equalizing the baseband signals; an adder for adding a repeater identifier to the baseband signals; a modulator for modulating the baseband signals with the repeater identifier added in the adder into RF signals; and a transmitter for transmitting the RF signals modulated in the modulator. The technology of the present invention is used to form an on- channel repeating network in an arbitrary transmission system including a digital television broadcasting system.

    ON-CHANNEL REPEATING APPARATUS AND METHOD FOR TERRESTRIAL DIGITAL TELEVISION BROADCASTING SERVICE
    46.
    发明专利
    ON-CHANNEL REPEATING APPARATUS AND METHOD FOR TERRESTRIAL DIGITAL TELEVISION BROADCASTING SERVICE 未知

    公开(公告)号：CA2454295A1

    公开(公告)日：2004-11-20

    申请号：CA2454295

    申请日：2003-12-29

    Applicant: KOREA ELECTRONICS TELECOMM

    Inventor： KIM SEUNG-WON ,  LEE SOO-IN ,  LEE YONG-TAE ,  PARK SUNG-IK

    IPC: H04N7/015 ,  H04H20/00 ,  H04H20/06 ,  H04N5/21 ,  H04N5/40 ,  H04N5/44 ,  H04N5/455 ,  H04N5/00 ,  H04H1/00 ,  H04B7/005

    Abstract: A repeater and method for an ATSC terrestrial digital TV broadcasting service. The on-channel repeater includes: a receiving unit for receiving a Radio Frequency (RF) broadcast signal from a main transmitter; a frequency downlink converting unit for converting the received RF broadcast signal into an intermediate frequency (IF) signal; a demodulating unit for converting the converted IF signal into a baseband signal; an equalizing unit for removing noise and multi-path signals generated from the converted baseband signal; a modulating unit for converting the baseband signal into an IF signal; a frequency uplink converting unit for converting the IF signal into a RF broadcast signal; a high power amplifying unit for amplifying and repeating the converted RF broadcast signal; a transmitting unit for transmitting the RF broadcast signal outputted from the high power amplifying unit; and a signal synchronizing unit for generating the first reference frequency, and generating the second reference frequency based on the first reference frequency such that the transmission/reception signal are frequency-and-phase synchronized.

    KALMAN-VITERBI JOINT CHANNEL EQUALIZER
    48.
    发明专利
    KALMAN-VITERBI JOINT CHANNEL EQUALIZER 未知

    公开(公告)号：CA2482815A1

    公开(公告)日：2003-10-30

    申请号：CA2482815

    申请日：2003-04-17

    Applicant: KOREA ELECTRONICS TELECOMM

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

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

    Abstract: In a channel equalizer applicable to a digital television receiver, a forwar d filter and a backward filter perform filtering to an input signal and a predetermined signal. A Viterbi decoder corrects errors during a transmissio n 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 outp ut 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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