公开(公告)号：KR1020080050236A

公开(公告)日：2008-06-05

申请号：KR1020070067185

申请日：2007-07-04

Applicant: 한국전자통신연구원 ,  부산대학교 산학협력단

Inventor： 임형수 ,  김영수 ,  최서미 ,  임종수 ,  김지현 ,  김완진 ,  김형남

IPC: H04J11/00

CPC classification number: H04L27/261 ,  H03M13/1102 ,  H03M13/235 ,  H04L1/004 ,  H04L5/0048 ,  H04L27/2626

Abstract: A method and an apparatus for hierarchical modulation/demodulation in an OFDM(Orthogonal Frequency Division Multiplexing) system are provided to perform an in-phase demodulation by using a pilot which is transferred to a second layer. A hierarchical modulation apparatus in an OFDM system includes first and second encoders(110,120), a pilot insertion unit(130), and a hierarchical modulation unit(140). The first encoder encodes a first layer signal stream, which is a basic layer signal. The second encoder encodes a second layer signal stream which is an enhancement layer signal. The pilot insertion portion inserts a pilot signal for estimating a channel coefficient to an encoded second layer signal stream. The hierarchical modulation portion modulates the second layer signal stream, to which the pilot signal is inserted, and the encoded first layer signal stream, and combines the encoded signals with each other.

Abstract translation: 提供了一种用于OFDM（正交频分复用）系统中的分级调制/解调的方法和装置，以通过使用传送到第二层的导频来执行同相解调。 OFDM系统中的分级调制装置包括第一和第二编码器（110,120），导频插入单元（130）和分层调制单元（140）。 第一编码器编码作为基本层信号的第一层信号流。 第二编码器对作为增强层信号的第二层信号流进行编码。 导频插入部分将用于估计信道系数的导频信号插入到编码的第二层信号流。 分级调制部分调制导频信号插入到其上的第二层信号流和编码的第一层信号流，并将编码信号相互组合。

公开(公告)号：KR1020030056269A

公开(公告)日：2003-07-04

申请号：KR1020010086466

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 서재현 ,  이용태 ,  김형남 ,  김승원 ,  류영재 ,  김정진 ,  한동석

IPC: H04N7/015

CPC classification number: H04L25/03019 ,  H04L2027/0065 ,  H04L2027/0069

Abstract: PURPOSE: An apparatus and method for compensating for a carrier frequency offset using comparison of power of spectrum edge are provided to compensate for a frequency offset rapidly and accurately even when pilot power is reduced or distortion is generated in a pilot signal. CONSTITUTION: An analog/digital converter(101) converts an analog input signal into a digital signal. An automatic frequency controller(103) compares powers of outer portions of both sides of a baseband signal spectrum converted into a digital signal to estimate a frequency offset. A loop filter(106) and a numerical controlled oscillator(102) compensates for the estimated frequency offset. A phase controller(104) compensates for a remaining phase offset of carrier. The loop filter accumulates the number of times of changing the sign of a signal output from a sign determinator of the phase offset estimator to judge a remaining frequency offset and variably adjusts the bandwidth of the loop filter to compensate for the estimated frequency offset.

Abstract translation: 目的：提供使用频谱边缘功率比较来补偿载波频率偏移的装置和方法，即使当导频功率降低或导频信号中产生失真时，也可以快速，准确地补偿频偏。 构成：模拟/数字转换器（101）将模拟输入信号转换为数字信号。 自动频率控制器（103）比较转换成数字信号的基带信号频谱的两侧的外部功率来估计频率偏移。 环路滤波器（106）和数控振荡器（102）补偿估计的频率偏移。 相位控制器（104）补偿载波的剩余相位偏移。 环路滤波器累积改变从相位偏移估计器的符号确定器输出的信号的符号的次数，以判断剩余频率偏移，并可变地调整环路滤波器的带宽以补偿估计的频率偏移。

公开(公告)号：KR1020020095752A

公开(公告)日：2002-12-28

申请号：KR1020010033943

申请日：2001-06-15

Applicant: 한국전자통신연구원

Inventor： 엄기문 ,  허남호 ,  김형남

IPC: G06T17/00

CPC classification number: G06T17/05 ,  G06T7/30 ,  G06T2200/08

Abstract: PURPOSE: A method for fusing stereo image disparity map and a method for displaying 3D images by the same are provided to fuse two matching results by adaptively applying regulations according to pixel kind for obtaining precise disparity map. CONSTITUTION: A method for fusing stereo image disparity map includes the steps of initiating index for displaying a position in an image(301), checking whether a reference image pixel at the position displayed by the index is an edge image(302), carrying out edge pixel fusion if yes and moving to a next position to proceed to the second step(303,306), and carrying out non-edge pixel fusion in the other case and moving a next position to proceed to the second step(305,306).

Abstract translation: 目的：提供一种融合立体图像视差图的方法和一种用于显示3D图像的方法，通过根据像素种类适应规则来获得精确的视差图来融合两个匹配结果。 一种用于融合立体图像视差图的方法，包括启动用于显示图像中的位置的指标的步骤（301），检查由索引显示的位置处的参考图像像素是否是边缘图像（302），执行 边缘像素融合，并且移动到下一位置以进行到第二步骤（303,306），并且在另一种情况下执行非边缘像素融合并移动下一个位置以进行到第二步骤（305,306）。

公开(公告)号：KR1020020054253A

公开(公告)日：2002-07-06

申请号：KR1020000083384

申请日：2000-12-27

Applicant: 한국전자통신연구원

Inventor： 엄기문 ,  조성배 ,  김형남 ,  허남호 ,  이진환 ,  조숙희 ,  유웅식 ,  조진호

IPC: H04N13/00

Abstract: PURPOSE: A device for processing a digital stereo image is provided to perform a decimation filtering and an interpolation filtering for a digital stereo image, to reduce information lost, and to transmit/restore a stereo image in an existing digital video processing device, thereby obtaining a high-quality stereo image. CONSTITUTION: A decimation filter(210) decimation-filters left/right images pictured from video cameras(200, 201). A multiplexer(220) multiplexes the decimation-filtered images. A recorder/transmitter(230) records or transmits the multiplexed image signals. An image separator(240) reproduces, receives, and decodes data recorded or transmitted from the recorder/transmitter, and separates the left image from the right image. An interpolation filter(250) interpolation-filters the separated images to restore to original size. An image display(260) displays the restored images.

Abstract translation: 目的：提供一种用于处理数字立体声图像的装置，用于对数字立体声图像执行抽取滤波和内插滤波，以减少信息丢失，并在现有数字视频处理装置中发送/恢复立体声图像，从而获得 高质量立体图像。 构成：抽取滤波器（210）对来自摄像机（200,201）的左/右图像进行抽取滤波。 多路复用器（220）复用经抽取滤波的图像。 记录器/发送器（230）记录或发送多路复用的图像信号。 图像分离器（240）再现，接收和解码从记录器/发送器记录或发送的数据，并将左图像与右图像分离。 内插滤波器（250）内插 - 对分离的图像进行滤波以恢复为原始大小。 图像显示（260）显示恢复的图像。

公开(公告)号：KR1020110031062A

公开(公告)日：2011-03-24

申请号：KR1020090128534

申请日：2009-12-21

Applicant: 한국전자통신연구원 ,  부산대학교 산학협력단

Inventor： 음호민 ,  김흥묵 ,  조용구 ,  김형남

IPC: H04B7/14

CPC classification number: H04B7/15585 ,  H04B7/15571

Abstract: PURPOSE: A feedback signal removing device of a same channel relay device and a method thereof are provided to minimize a spectrum distortion due to a DC pilot signal of a restored signal. CONSTITUTION: A reference signal generating unit(508) receives a signal outputted from an RF transmitting unit. The reference generating unit generates a reference signal in which a DC pilot is removed. A replica generating unit(504) generates an output signal of a subtracting unit and a filter factor by using the relationship of a signal generated in a reference signal generating unit. The replica generating unit generates a replica of a feedback signal by using the generating filter factor and a downlink converted signal in a second RF receiving unit.

Abstract translation: 目的：提供相同信道中继装置的反馈信号去除装置及其方法，以使由恢复信号的直流导频信号引起的频谱失真最小化。 构成：参考信号生成单元（508）接收从RF发送单元输出的信号。 参考产生单元产生其中去除直流导频的参考信号。 复制品生成单元（504）通过使用在参考信号生成单元中生成的信号的关系来生成减法单元的输出信号和滤波器系数。 复制品生成单元通过使用第二RF接收单元中的生成滤波器因子和下行链路转换信号来生成反馈信号的副本。

公开(公告)号：KR1020090112190A

公开(公告)日：2009-10-28

申请号：KR1020080037929

申请日：2008-04-23

Applicant: 한국전자통신연구원 ,  부산대학교 산학협력단

Inventor： 음호민 ,  이용태 ,  김흥묵 ,  이영준 ,  김형남

IPC: H04B7/15

CPC classification number: H04B7/15585 ,  H04B1/12 ,  H04B1/16

Abstract: PURPOSE: A method for removing a feedback signal of an on-channel repeater and an apparatus thereof are provided to suppress the feedback signal below a predetermined level by generating a replica to remove the feedback signal. CONSTITUTION: An on-channel repeater comprises the first replica generating unit(150), the second replica generating unit(160), the final replica generating unit(170), and the feedback signal removing unit(130). The first replica generating unit generates the first replica for the feedback signal. The second replica generating unit generates the second replica for the feedback signal. The feedback signal compensates the spectral distortion generated in the feedback removal.

Abstract translation: 目的：提供一种用于去除同信道中继器的反馈信号的方法及其装置，用于通过生成副本来消除反馈信号来将反馈信号抑制在预定电平以下。 构成：同频转发器包括第一副本生成单元（150），第二副本生成单元（160），最终副本生成单元（170）和反馈信号去除单元（130）。 第一副本生成单元生成反馈信号的第一副本。 第二副本生成单元生成反馈信号的第二副本。 反馈信号补偿在反馈消除中产生的频谱失真。

公开(公告)号：KR1020090037268A

公开(公告)日：2009-04-15

申请号：KR1020070109608

申请日：2007-10-30

Applicant: 한국전자통신연구원 ,  부산대학교 산학협력단

Inventor： 박성익 ,  이용태 ,  임종수 ,  이수인 ,  이지봉 ,  김완진 ,  김형남 ,  손경식

IPC: H04B7/14 ,  H04B3/23

CPC classification number: H04B7/15585

Abstract: On-channel repeaters with feedback cancellation based on partitioning of pilots and a method thereof are provided to be capable of removing feedback signals based on pilot partitioning and a method thereof, which can quickly cope with a rapid change of a feedback channel and thus efficiently remove a feedback signal by reducing an update interval of a filter coefficient, i.e., increasing the number of times of filter-coefficient creation through pilot partitioning. An on-channel repeater capable of removing feedback signals based on pilot partitioning includes an Rx antenna(901), an RF receiver(902), a sub tractor(903), an RF transmitter(907), a Tx antennal(908), and a replica creator(909). The replica creator creates a filter coefficient through pilot partitioning, creates a replica of a feedback signal by using the created filter coefficient, and feeds back the created replica to the subtractor. An RF signal received via the Rx antenna from a main transmitter or another repeater is down-converted into a signal of a predetermined band by the RF receiver. The subtractor subtracts a replica of a feedback signal from the down- converted signal of the predetermined band, thereby removing the feedback signal. The replica creator creates a filter coefficient through pilot partitioning, creates a replica of the feedback signal by using the created filter coefficient, and feeds back the created replica to the subtractor. The RF transmitter converts an output signal from the subtractor into an RF signal, and transmits the RF signal via the Tx antenna by radio. The replica creator includes an adaptive filter(904), a filter coefficient creator(905), and a partitioned-pilot storage(906) for storing a partitioned pilot to be used at the filter coefficient creator.

Abstract translation: 提供了基于导频分割的反馈消除的通道中继器及其方法，其能够基于导频分区及其方法去除反馈信号，其可以快速应对反馈信道的快速变化，从而有效地去除 通过减少滤波器系数的更新间隔，即通过导频分割增加滤波器系数创建的次数来提供反馈信号。 能够基于导频分割去除反馈信号的同频中继器包括Rx天线（901），RF接收机（902），子牵引器（903），RF发射机（907），Tx天线（908）， 和复制品创建者（909）。 副本创建者通过导频分区创建滤波器系数，通过使用创建的滤波器系数创建反馈信号的副本，并将创建的副本反馈到减法器。 通过Rx天线从主发射机或另一中继器接收的RF信号被RF接收机下变频成预定频带的信号。 减法器从预定频带的下变频信号中减去反馈信号的副本，从而消除反馈信号。 副本创建者通过导频分区创建滤波器系数，通过使用创建的滤波器系数创建反馈信号的副本，并将创建的副本反馈到减法器。 RF发送器将来自减法器的输出信号转换为RF信号，并通过无线电通过Tx天线发送RF信号。 复制品创建器包括自适应滤波器（904），滤波器系数创建器（905）和用于存储要在滤波器系数创建器处使用的分区导频的分区导频存储器（906）。

公开(公告)号：KR100518029B1

公开(公告)日：2005-10-04

申请号：KR1020020032627

申请日：2002-06-11

Applicant: 한국전자통신연구원

Inventor： 김형남 ,  이용태 ,  김승원

IPC: H04B7/005

CPC classification number: H04L25/0305 ,  H04L2025/0349 ,  H04L2025/03681 ,  H04L2025/03694

Abstract: 1. 청구범위에 기재된 발명이 속한 기술분야
오차 전파(Error Propagation)를 감소시킴으로써 필터부의 수렴 성능을 향상시키고 심벌 오차율을 감소시킬 수 있는 블라인드 판정궤환등화 장치 및 그 방법에 관한 것임.
2. 발명이 해결하고자 하는 기술적 과제
SAG 플래그에 따라 피드백 필터의 입력을 양자화에 의한 오차가 줄어들 수 있도록 선택하여 인가함으로써 오차 전파(Error Propagation)를 감소시키며 이에 따라 수렴 성능 향상 및 수렴 후 정상 상태에서의 심벌 오차율를 감소시킬 수 있는 블라인드 판정궤환등화 장치 및 그 방법을 제공함.
3. 발명의 해결 방법의 요지
기저대역 신호에 대해 블라인드 판정궤환등화를 수행하여 신호 를 출력하는 메인 필터 수단, 상기 를 양자화하여 데이터 심벌 를 출력하는 양자화 수단, 상기 및 를 기초로 탭 계수 갱신 여부를 결정하고 상기 및 중 어느 하나를 상기 메인 필터 수단으로 궤환시키는 블라인드 판정궤환 제어 수단 및 상기 블라인드 판정궤환 제어 수단의 탭 계수 갱신 여부 결정에 따라 상기 메인 필터 수단으로 인가되는 탭 계수를 갱신하는 탭 계수 갱신 수단을 포함함.
4. 발명의 중요한 용도
블라인드 판정궤환등화 장치에 적용됨.

公开(公告)号：KR100399054B1

公开(公告)日：2003-09-26

申请号：KR1020010086466

申请日：2001-12-28

Applicant: 한국전자통신연구원

Inventor： 서재현 ,  이용태 ,  김형남 ,  김승원 ,  류영재 ,  김정진 ,  한동석

IPC: H04N7/015

Abstract: PURPOSE: An apparatus and method for compensating for a carrier frequency offset using comparison of power of spectrum edge are provided to compensate for a frequency offset rapidly and accurately even when pilot power is reduced or distortion is generated in a pilot signal. CONSTITUTION: An analog/digital converter(101) converts an analog input signal into a digital signal. An automatic frequency controller(103) compares powers of outer portions of both sides of a baseband signal spectrum converted into a digital signal to estimate a frequency offset. A loop filter(106) and a numerical controlled oscillator(102) compensates for the estimated frequency offset. A phase controller(104) compensates for a remaining phase offset of carrier. The loop filter accumulates the number of times of changing the sign of a signal output from a sign determinator of the phase offset estimator to judge a remaining frequency offset and variably adjusts the bandwidth of the loop filter to compensate for the estimated frequency offset.

Abstract translation: 目的：提供一种利用频谱边缘的功率比较来补偿载波频率偏移的设备和方法，以即使在导频信号中导频功率减小或失真时也快速和准确地补偿频率偏移。 构成：模拟/数字转换器（101）将模拟输入信号转换为数字信号。 自动频率控制器（103）比较转换成数字信号的基带信号频谱两侧的外部部分的功率，以估计频率偏移。 环路滤波器（106）和数控振荡器（102）补偿估计的频率偏移。 相位控制器（104）补偿载波的剩余相位偏移。 环路滤波器累加改变从相位偏移估计器的符号确定器输出的信号的符号的次数以判断剩余频率偏移并且可变地调整环路滤波器的带宽以补偿估计的频率偏移。

公开(公告)号：KR1020020042917A

公开(公告)日：2002-06-08

申请号：KR1020000072276

申请日：2000-12-01

Applicant: 한국전자통신연구원

Inventor： 엄기문 ,  조성배 ,  허남호 ,  김형남

IPC: H04N13/02

CPC classification number: H04N2013/0081

Abstract: PURPOSE: A device for controlling vergence of a stereo camera is provided to interwork vergence control according to zoom lens operations of the stereo camera, and to perform a more exact vergence control by parallax found through a signal processing, thereby enabling a more exact vergence control in the stereo camera. CONSTITUTION: A focus controller(140) operates lens operators(121) to equalize images photographed by at least two cameras, and performs a focus control. A zoom and vergence controller(130) finds a distance between central points of the two cameras where parallax becomes zero according to positions of lenses(111) and a subject, when the focus control is performed. A camera driver(120) controls a distance between centers of the two cameras according to the distance between the central points of the two cameras, and performs a vergence control. A signal processor transmits a control signal vergence information to the camera driver according to a vergence angle, which is obtained by calculating the parallax by using video data obtained when the vergence control is performed, and carries out a 2-step vergence control.

Abstract translation: 目的：根据立体摄像机的变焦镜头操作，提供用于控制立体摄像机聚光的装置，以便通过信号处理发现的视差来执行更精确的聚焦控制，从而实现更准确的聚集控制 在立体相机中。 构成：聚焦控制器（140）操作透镜操作器（121）以均衡由至少两个照相机拍摄的图像，并且执行聚焦控制。 当执行聚焦控制时，变焦和聚光控制器（130）根据透镜（111）和被摄体的位置，找到两个摄像机的中心点之间的距离，其中视差变为零。 相机驱动器（120）根据两个照相机的中心点之间的距离来控制两个照相机的中心之间的距离，并进行聚光控制。 信号处理器根据通过使用执行聚合控制时获得的视频数据计算视差获得的聚合角度，向照相机驱动器发送控制信号聚合信息，并执行2步聚合控制。