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.

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.

公开(公告)号：CA2553753A1

公开(公告)日：2005-07-28

申请号：CA2553753

申请日：2004-12-31

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04N7/015 ,  H04B7/155 ,  H04N5/40

Abstract: Provided is a modulating apparatus and method of an on-channel repeater. An object of the present invention is to provide a modulating apparatus of an o n- channel repeater for reducing time delay by configuring and up-sampling a baseband signal, filtering the up-sampled baseband signal with an Equi-Rippl e (ER) filter or in a window method, and converting the filtered baseband sign al into an RF signal. The modulating apparatus includes: a baseband signal configuring unit for configuring a baseband. signal by combining an input field and a segment sync signal; a pilot adding unit for adding a pilot sign al to the baseband signal; a filtering unit for filtering the baseband signal with the pilot signal; and an RF up-converting unit for up-converting the filtered signal into an RF signal. The present invention is used to form an on- channel repeating network in a transmitting system including a digital TV broadcasting system.

公开(公告)号：CA2534435A1

公开(公告)日：2005-03-03

申请号：CA2534435

申请日：2003-12-30

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SO-RA ,  JEONG YOUNG-HO ,  LEE HYUN ,  LEE BONG-HO ,  LEE SOO-IN ,  HAHM YOUNG-KWON

IPC: H04H1/00 ,  H04H20/71 ,  H04H20/95 ,  H04H60/07 ,  H04N5/38 ,  H04N7/24 ,  H04N7/52

Abstract: Provided is a digital multimedia broadcasting (DMB) system that can provide a multimedia data broadcasting service having an excellent reception quality, a method thereof, and a computer-readable recording medium for recording a program that implements the method. The DMB system includes an encoding unit for encoding an inputted audio/video signal; a synchronizing unit for synchronizing media stream, additional data, interactive service objectifyin g data that are outputted from the encoding unit; a multiplexing unit for multiplexing the media stream outputted from the synchronizing unit; an erro r correction encoding unit for performing additional error correction encoding on the media stream outputted from the multiplexing unit; an interleaving un it for removing temporal correlation between adjacent byte units within a data stream outputted from the error correction encoding unit; and a transmitting unit for transmitting a DMB media stream outputted from the interleaving uni t to the conventional DAB system and other digital broadcasting systems.

公开(公告)号：AU2003285812A1

公开(公告)日：2004-12-13

申请号：AU2003285812

申请日：2003-12-27

Applicant: KOREA ELECTRONICS TELECOMM

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

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

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.

公开(公告)号：AU2003224465A1

公开(公告)日：2004-05-04

申请号：AU2003224465

申请日：2003-04-24

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： AHN CHIETEUK ,  LEE BONG-HO ,  LEE HYUN ,  LEE SOO-IN

IPC: G10L13/04 ,  G10L15/26 ,  H04N5/445

Abstract: Disclosed is a system for providing an electronic program guide and a method of providing the same, the electronic program guide (EPG) being about a plurality of programs supplied through a digital broadcasting system, including the steps of receiving service information transmitted from the digital broadcasting system, and extracting the EPG information from the service information to store the EPG information; analyzing a user's request and extracting EPG information that meets the user's request from the stored EPG information to produce tailored EPG information; converting the tailored EPG information into speech EPG information; and reproducing the speech EPG information as speech to provide users with the EPG information.

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.

公开(公告)号：CA2726022A1

公开(公告)日：2009-12-03

申请号：CA2726022

申请日：2009-05-29

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： PARK SUNG-IK ,  LIM HYOUNGSOO ,  KIM HEUNG-MOOK ,  LEE SOO-IN

IPC: H04N7/08

Abstract: A method and apparatus for transmitting/receiving broadcasting-communication data is provided. The apparatus includes: an original signal generator configured to receive the original data and generate baseband original signals; a first modulator configured to receive the baseband additional signals and generate original signals of a predetermined band; an additional signal generator configured to receive the additional data and generate baseband additional signals; a second modulator configured to receive the baseband additional signals and generate additional signals of a predetermined band; an average power controller configured to control an average power of the additional signals of the predetermined band; an inserter configured to insert the additional signals of the predetermined band with a controlled average power to the original signals of the predetermined band to thereby generate mixed signals of a predetermined band; and a transmitter configured to transmit the mixed signals of the predetermined band.

公开(公告)号：DE112007002220T5

公开(公告)日：2009-07-30

申请号：DE112007002220

申请日：2007-09-21

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： JEONG YOUNG-HO ,  KIM HYUN-GON ,  KIM SOON-CHOUL ,  CHO SAM-MO ,  KIM GEON ,  AHN CHUNG-HYUN ,  LEE SOO-IN

IPC: H04N7/08

Abstract: There is provided a method for processing a TPEG-based application service, including the steps of: receiving a TPEG-based broadcasting stream related to RFID application information through a broadcasting communication network; parsing the received broadcasting stream and extracting frames having no errors; analyzing characteristics (application IDs) of service components of the extracted frames to classify the extracted frames into RFID application data, LOC data, and SNI data by corresponding services; storing the classified RFID application data, LOC data, and SNI data in corresponding storage areas; searching RFID application related data of a corresponding service from a corresponding storing area in response to a RFID application service request from a user; and outputting the searched corresponding RFID application related data.

公开(公告)号：MX2007003049A

公开(公告)日：2007-08-02

申请号：MX2007003049

申请日：2005-09-15

Applicant: KOREA ELECTRONICS TELECOMM

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

IPC: H04N5/00 ,  H04N7/24

Abstract: Se proporciona un transmisor/receptor de Television, Digital de Banda Lateral Residual (DTV) con base en el Comite del Sistema de Television Avanzado A/53. la invencion proporciona el transmisor/receptor DTV que tiene una estructura de flujo dual a traves de la generacion de datos robustos que tienen una proporcion de transmision de un cuarto tan rapido como la de los datos normales y un metodo para la misma. El transmisor DTV incluye medios de entrada para recibir el flujo de datos de video digital que incluye datos robustos y datos normales, medios de codificacion para realizar la codificacion de 1/4 de proporcion en el flujo de datos de video digitales de manera que un bit puede transmitirse a traves de dos simbolos y medios de transmision para modular/transmitir las senales de salida de los medios de codificacion. Esta invencion puede reducir el SNR y satisfacer el TOV de los datos robustos mediante realizar el FEC adicional de los datos robustos, transmitiendo/recibiendo los datos robustos 1/4 de proporcion codificados, que son capaces de transmitir datos de un bit para dos simbolos y mejorando la habilidad de decodificacion de un ecualizador y un decodificador trellis de un receptor DTV.