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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
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.
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公开(公告)号：CA2534435C
公开(公告)日：2013-06-18
申请号：CA2534435
申请日：2003-12-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： JEONG YOUNG-HO , LEE HYUN , LEE BONG-HO , PARK SO-RA , HAHM YOUNG-KWON , LEE SOO-IN
IPC: H04N21/236 , H04H1/00 , H04H20/71 , H04H20/95 , H04H60/07 , H04N5/38 , H04N7/24 , H04N7/50 , 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 objectifying data that are outputted from the encoding unit; a multiplexing unit for multiplexing the media stream outputted from the synchronizing unit; an error correction encoding unit for performing additional error correction encoding on the media stream outputted from the multiplexing unit; an interleaving unit 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 unit to the conventional DAB system and other digital broadcasting systems.
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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.
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公开(公告)号：AT484132T
公开(公告)日：2010-10-15
申请号：AT03781076
申请日：2003-12-30
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： YUN KUG-JIN , AHN CHUNG-HYUN , KANG HOON-JONG , HUR NAM-HO , CHO SUK-HEE , LEE SOO-IN
Abstract: Provided is a five sensory data synchronizing and transmitting apparatus and method, and an actual-feeling multimedia data providing system and method using the same. The five sensory data synchronizing and transmitting apparatus and method forms packets by describing vibration, an odor and a taste expressed in video/audio based on touch, odor and taste data descriptors and synchronizes the touch/odor/taste packets with video/audio packets on a frame basis; and then, the actual-feeling multimedia data providing system and method demultiplexes the received packets transmitted from the five sensory data synchronizing and transmitting apparatus into video data, audio data, touch data, odor data and taste data and transmits them to corresponding devices to thereby provide a user with an actual-feeling multimedia service.
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公开(公告)号：CA2698669A1
公开(公告)日：2009-03-12
申请号：CA2698669
申请日：2008-05-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE JAE-YOUNG , PARK SUNG-IK , EUM HO-MIN , SEO JAE-HYUN , KIM HEUNG-MOOK , LIM JONG-SOO , LEE SOO-IN
IPC: H04B7/14
Abstract: Provided is an identification signal analyzing apparatus and method for compensating power of a channel profile occurring at a conventional identification signal analyzing apparatus by using a power compensation. The identification signal analyzing apparatus includes: an identification signal generator for generating an identification signal identical to a known identification signal inserted by a transmission device; a partial correlator for calculating a correlation value between a received signal including the known identification signal inserted by the transmission device and the identification signal generated by the identification signal generator through a partial correlation; a power compensator for compensating power of the correlation value calculated by the partial correlator; and a channel profile extractor for extracting a channel profile from the correlation value compensated by the power compensator.
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Patent Agency Ranking
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.
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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.
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公开(公告)号：CA2464252A1
公开(公告)日：2005-04-29
申请号：CA2464252
申请日：2004-04-08
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： KIM SEUNG-WON , SEO JAE-HYUN , LEE SOO-IN , LEE YONG-TAE , PARK SUNG-IK
IPC: H04N7/015 , H04B1/10 , H04H20/06 , H04L27/06 , H04L27/14 , H04N5/21 , H04N5/38 , H04N5/455 , H04H1/00
Abstract: Provided is a demodulation apparatus capable of reducing time delay of an on-channel repeater in a terrestrial digital television (TV) broadcasting system and a demodulation method thereof. The demodulation method includes the steps of a) converting an analogue intermediate frequency (IF) signal into a digital IF signal; b) generating an in-phase (I) signal and a quadrature (Q) signal by converting the frequency of the digital IF signals and down-converting the frequencies of the pilot components of the I and Q signals so that the center frequencies of the I and Q signals could be shifted to 0; c) filtering the down-converted I and Q signals and maximizing signal-to-noise -ratio; d) up-converting the filtered I and Q signals into baseband signals in which the center frequencies of the filtered I and Q signals are placed in baseband and shifting the frequency of the pilot components of the filtered I and Q signals to 0; and e) adding up the up-converted I and Q signals to restore the signals into baseband signals for broadcasting.
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公开(公告)号：CA2698669C
公开(公告)日：2014-08-05
申请号：CA2698669
申请日：2008-05-15
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： LEE JAE-YOUNG , PARK SUNG-IK , EUM HO-MIN , SEO JAE-HYUN , KIM HEUNG-MOOK , LIM JONG-SOO , LEE SOO-IN
IPC: H04B7/14
Abstract: Provided is an identification signal analyzing apparatus and method for compensating power of a channel profile occurring at a conventional identification signal analyzing apparatus by using a power compensation. The identification signal analyzing apparatus includes: an identification signal generator for generating an identification signal identical to a known identification signal inserted by a transmission device; a partial correlator for calculating a correlation value between a received signal including the known identification signal inserted by the transmission device and the identification signal generated by the identification signal generator through a partial correlation; a power compensator for compensating power of the correlation value calculated by the partial correlator; and a channel profile extractor for extracting a channel profile from the correlation value compensated by the power compensator.
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30.发明专利
公开(公告)号：CA2687675C
公开(公告)日：2014-05-27
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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