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公开(公告)号：CA2543646A1
公开(公告)日：2005-05-06
申请号：CA2543646
申请日：2004-10-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE SOO-IN , KIM SEUNG-WON , LEE YONG-TAE , SEO JAE-HYUN
Abstract: Provided is an on-channel repeater and method thereof. The on-channel repeating apparatus includes: a receiving unit for receiving a Radio Frequency (RF) broadcast signal; a demodulating unit for converting the RF signal into a baseband signal; an equalizing unit for equalizing the baseband signal to generate an equalized baseband signal; a modulating unit for converting the equalized baseband signal into an RF signal; and a transmitting unit for transmitting the RF signal.
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52.发明专利
公开(公告)号：AU2003289586A1
公开(公告)日：2005-04-14
申请号：AU2003289586
申请日：2003-12-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： BAE BYUNG-JUN , LEE JIN-HWAN , CHO SAM-MO , KIM GEON , LEE YONG-HOON , HAHM YOUNG-KWON , LEE SOO-IN
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公开(公告)号：CA2605834C
公开(公告)日：2012-02-14
申请号：CA2605834
申请日：2005-12-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： PARK SUNG-IK , LEE YONG-TAE , EUM HO-MIN , KIM HEUNG-MOOK , SEO JAE-HYUN , KIM SEUNG-WON , LEE SOO-IN
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.
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54.发明专利
公开(公告)号：CA2687675A1
公开(公告)日：2010-06-08
申请号：CA2687675
申请日：2009-12-07
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LIM HYOUNGSOO , KIM HEUNG-MOOK , LEE SOO-IN
Abstract: An apparatus for transmitting a signal for handoff in a transmitter of a broadcasting network where a plurality of center frequencies exist includes: a baseband broadcasting signal generation unit configured to generate a baseband broadcasting signal from broadcasting data to be transmitted; a transmitter identification signal sequence generation unit configured to generate a transmitter identification signal of the transmitter; a first transmission unit configured to combine the baseband broadcasting signal and the transmitter identification signal, and up-convert the combined signal to a center frequency of the transmitter; and a second transmission unit configured to modulate the transmitter identification signal, and up-convert the modulated transmitter identification signal to center frequencies of adjacent transmitters.
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公开(公告)号：AT440447T
公开(公告)日：2009-09-15
申请号：AT03721110
申请日：2003-04-24
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE BONG-HO , LEE HYUN , LEE SOO-IN , AHN CHIETEUK
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.
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Patent Agency Ranking
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.
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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.
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58.发明专利
公开(公告)号：CA2454295C
公开(公告)日：2007-05-15
申请号：CA2454295
申请日：2003-12-29
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE SOO-IN , PARK SUNG-IK , LEE YONG-TAE , KIM SEUNG-WON , EUM HO-MIN , SEO JAE-HYUN
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.
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59.发明专利
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.
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60.发明专利
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
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.
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