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公开(公告)号：KR1020110045696A
公开(公告)日：2011-05-04
申请号：KR1020090102373
申请日：2009-10-27
Applicant: 한국과학기술원
IPC: H04B7/26
CPC classification number: H04L25/0202 , H04L5/0044 , H04L5/0048 , H04L25/022
Abstract: PURPOSE: An apparatus and method for estimating a channel are provided to efficiently estimate a channel through an optimized memory use method. CONSTITUTION: A time axis interpolation unit(340) performs interpolation in a time axis by using the channel estimation value of a pilot subcarrier stored in an internal buffer unit. A frequency axis interpolation unit(350) performs interpolation in a frequency axis by using the channel estimation value stored in the internal buffer unit. An output buffer unit(360) receives and stores the channel estimation value obtained through the frequency axis interpolation unit and the channel estimation value stored in the internal buffer unit.
Abstract translation: 目的：提供一种用于估计信道的装置和方法，以通过优化的存储器使用方法来有效地估计信道。 构成：时间轴插补单元（340）通过使用存储在内部缓冲器单元中的导频子载波的信道估计值在时间轴上进行插值。 频率轴内插单元（350）通过使用存储在内部缓冲器单元中的信道估计值在频率轴上进行内插。 输出缓冲器单元（360）接收并存储通过频率轴内插单元获得的信道估计值和存储在内部缓冲器单元中的信道估计值。
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公开(公告)号：KR101023646B1
公开(公告)日：2011-03-22
申请号：KR1020090090514
申请日：2009-09-24
Applicant: 한국과학기술원
CPC classification number: H04L27/0002 , H04L27/0008 , H04L27/0012
Abstract: PURPOSE: An apparatus and a method for processing a multi channel signal and a multi channel receiver using the same are provided to process channel filtering and sampling of a narrow signal through the calculation capacity of a digital processor. CONSTITUTION: Two or more RF tuners(2013, 2014) receive a radio frequency signal. A channel filter(2010) removes an interference signal included in a signal outputted from a switch(2009). The channel filter passes through the signal of a transmission band. An ADC(analog to digital converter)(2011) converts the signal outputted from the channel filter into the digital filter. A fixed sampling frequency generator(2012) transmits the fixed sampling frequency to the ADC.
Abstract translation: 目的：提供一种用于处理多声道信号的装置和方法以及使用其的多声道接收机，以通过数字处理器的计算能力对窄信号进行信道滤波和采样。 构成：两个或更多个射频调谐器（2013年，2014年）接收射频信号。 信道滤波器（2010）去除从开关（2009）输出的信号中包含的干扰信号。 信道滤波器通过传输频带的信号。 ADC（模数转换器）（2011）将从通道滤波器输出的信号转换为数字滤波器。 固定采样频率发生器（2012）将固定采样频率发送到ADC。
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公开(公告)号：KR1020110027369A
公开(公告)日：2011-03-16
申请号：KR1020090085435
申请日：2009-09-10
Applicant: 한국과학기술원
CPC classification number: H04L25/0222 , H04L1/0009 , H04L1/1825 , H04L5/006 , H04L25/0202
Abstract: PURPOSE: An MCS determining apparatus and a method thereof in order to select an MCS level are provided to increase system performance in order to select a proper MCS(modulation and coding scheme) level. CONSTITUTION: A fading parameter estimating unit(102) estimates an SINR(signal-to-interference plus noise-ratio) average value of a lower link channel and a fading parameter. An MCS selecting unit(104) selects an MCS level by using the packet loss ratio and the average number of transmission. An MCS determining unit(100) transmits the MCS level to a base station(200).
Abstract translation: 目的：提供一种用于选择MCS级别的MCS确定装置及其方法，以增加系统性能以便选择适当的MCS（调制和编码方案）级别。 构成：衰落参数估计单元（102）估计下链路信道和衰落参数的SINR（信号与干扰加噪声比）平均值。 MCS选择单元（104）通过使用分组丢失率和平均发送次数来选择MCS级别。 MCS确定单元（100）将MCS级别发送到基站（200）。
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公开(公告)号：KR1020100058844A
公开(公告)日：2010-06-04
申请号：KR1020080117404
申请日：2008-11-25
Applicant: 한국과학기술원
IPC: H04N21/434 , H04N21/433 , H04N7/00
CPC classification number: H04N21/434 , H04H2201/11 , H04N21/4392 , H04N21/44004
Abstract: PURPOSE: A DMB(Digital Multimedia Broadcasting) receiving device and a method of controlling buffer are provided to minimize the buffering of the DMB signal. CONSTITUTION: A CTS(Composition Time Stamp) Clock controller(252) controls the time of the video frame of the audio frame of the audio ring buffer(223) and video ring buffer(233). According to the control signal of the CTS Clock controller, a video frame corresponding to the synchronization of the audio frame in which the video render thread(234) plays in the audio call back part(224) is received from the video ring buffer. The video render thread adjusts synchronization by the rendering of the video frame and audio frame.
Abstract translation: 目的：提供DMB（数字多媒体广播）接收装置和控制缓冲器的方法以最小化DMB信号的缓冲。 构成：CTS（构图时间戳）时钟控制器（252）控制音频环形缓冲器（223）和视频环形缓冲器（233）的音频帧的视频帧的时间。 根据CTS时钟控制器的控制信号，从视频环形缓冲器接收与视频呈现线程（234）在音频回叫部分（224）中播放的音频帧的同步相对应的视频帧。 视频渲染线程通过渲染视频帧和音频帧来调整同步。
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公开(公告)号：KR1020100058034A
公开(公告)日：2010-06-03
申请号：KR1020080116694
申请日：2008-11-24
Applicant: 한국과학기술원
IPC: H04N21/647
CPC classification number: H04N21/647 , H04H2201/11 , H04N21/41407 , H04N21/4333
Abstract: PURPOSE: An interlocking system between a DMB(Digital Multimedia Broadcasting) service and a VDD service and a method thereof are provided to offer the VDD service by searching reproduction start timing and a reproduction section of contents automatically considering watching state about interruption of DMB service watching. CONSTITUTION: A VOD(Video On Demand) service gateway server(300) stores information about interlocking relation of a DMB service and a VOD service. A user watches the DMB service and VOD service through a user terminal(100). If DMB service watching is interrupted, the user terminal stores user watching information. In case the user watches the same contents with the VOD service, the user terminal reproduces the VOD service considering the watching information of the user.
Abstract translation: 目的：提供DMB（数字多媒体广播）服务和VDD服务之间的联锁系统及其方法，以通过搜索再现开始时间和内容的再现部分自动考虑观看关于DMB服务观看中断的状态来提供VDD服务 。 规定：视频点播（视频点播）服务网关服务器（300）存储有关DMB服务和VOD服务的互锁关系的信息。 用户通过用户终端（100）观看DMB服务和VOD服务。 如果DMB服务观看被中断，则用户终端存储用户观看信息。 在用户观看与VOD服务相同的内容的情况下，用户终端考虑到用户的观看信息再现VOD服务。
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Patent Agency Ranking26.发明公开
公开(公告)号：KR1020100053750A
公开(公告)日：2010-05-24
申请号：KR1020080112517
申请日：2008-11-13
Applicant: 한국과학기술원
IPC: H04J11/00
CPC classification number: H04L27/2662 , H04L27/2656 , H04L27/2659 , H04L27/266 , H04L27/2675 , H04L25/0224
Abstract: PURPOSE: An apparatus for synchronizing of an OFDM signal using an open loop frequency synchronization method are provided to presume and compensate a frequency offset which is generated from the difference between reference clock frequencies. CONSTITUTION: An integer frequency offset estimator(475) uses a frequency offset estimation algorithm using the correlation value of PRS(phase reference symbol) and presumes the integral frequency offset. A frequency offset controller(476) estimates an integral frequency change by using a prime number frequency offset. A frequency offset compensation(477) compensate a frequency offset by using the state position of a collected start position frame and the start location of the corrected OFDM symbol.
Abstract translation: 目的：提供一种使用开环频率同步方法同步OFDM信号的装置，用于设定和补偿从参考时钟频率之间的差异产生的频率偏移。 构成：整数频率偏移估计器（475）使用使用PRS（相位参考符号）的相关值的频率偏移估计算法，并假定积分频率偏移。 频率偏移控制器（476）通过使用素数频率偏移来估计积分频率变化。 频率偏移补偿（477）通过使用收集的开始位置帧的状态位置和校正的OFDM符号的起始位置来补偿频率偏移。
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公开(公告)号：KR1020100041437A
公开(公告)日：2010-04-22
申请号：KR1020080100618
申请日：2008-10-14
Applicant: 한국과학기술원
IPC: H04B7/04
CPC classification number: H04B7/063 , H04B7/0413 , H04B7/061 , H04B7/0854
Abstract: PURPOSE: A transmission antenna selection method of a reception terminal is provided to improve performance and reduce the computational complexity by selecting a transmission antenna through a MMSE(Minimum Mean Square Error) detection method. CONSTITUTION: A sub-channel matrix is extracted from a selectable transmission antenna set between a transmission/reception terminal(S10). A SNR(Signal to Noise Ratio) according to each transmission data stream of the extracted transmission antenna is computed. The SNR is transformed according to the structure about the sub-channel matrix(S20). A sub-channel matrix when a minimum singular value is maximized is fed back to the transmission terminal(S50). According to the sub-channel matrix which the transmission terminal is fed back, the transmission antenna is selected(S60).
Abstract translation: 目的：提供一种接收终端的发射天线选择方法，通过MMSE（最小均方误差）检测方法选择发射天线，提高性能，降低计算复杂度。 构成：从发送/接收终端之间的可选择的发送天线提取子信道矩阵（S10）。 计算根据提取的发送天线的每个发送数据流的SNR（信噪比）。 根据关于子信道矩阵的结构来变换SNR（S20）。 当最小奇异值最大化时的子信道矩阵被反馈到传输终端（S50）。 根据发送端反馈的子信道矩阵，选择发送天线（S60）。
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公开(公告)号：KR1020100039664A
公开(公告)日：2010-04-16
申请号：KR1020080098723
申请日：2008-10-08
Applicant: 한국과학기술원
CPC classification number: G06T5/008 , G06T5/40 , G06T2207/20021 , G09G3/20 , G09G2320/0276 , G09G2320/0285 , G09G2320/0673 , G09G2320/0686 , G09G2360/16
Abstract: PURPOSE: A device and a method for correcting an image are provided to correct the detailed part of a subject in a dark or bright area to an identified image using a plurality of lookup tables. CONSTITUTION: A reverse gamma converter(110) releases a gamma conversion and linearizes R,G, and B. A boundary value calculator(120) calculates (m-1) boundary values for dividing the brightness of a pixel into m regions and designates one among m brightness regions about all pixels. A block divider(130) divides an input image into a plurality of blocks. A block statistical calculator(140) designates each block to the corresponding brightness region among the m brightness regions. An image corrector corrects the image using a lookup table according to the block generated through a lookup table generator.
Abstract translation: 目的：提供用于校正图像的装置和方法，以使用多个查找表将暗区或明亮区域中的被摄体的详细部分校正到所识别的图像。 构成：反向伽马转换器（110）释放伽马变换并使R，G和B线性化。边界值计算器（120）计算（m-1）用于将像素的亮度分割为m个区域的边界值，并指定一个 在关于所有像素的m个亮度区域中。 块分割器（130）将输入图像划分成多个块。 块统计计算器（140）将每个块指定到m个亮度区域中的对应的亮度区域。 图像校正器根据通过查找表生成器生成的块，使用查找表校正图像。
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公开(公告)号：KR100915598B1
公开(公告)日：2009-09-07
申请号：KR1020070094868
申请日：2007-09-18
Applicant: 한국과학기술원
IPC: H04N9/73
Abstract: 본 발명은 화이트밸런스(White Balance) 자동조정장치 및 방법에 관한 것이다.
본 발명에 따른 화이트밸런스 자동조정장치는 RGB 신호의 히스토그램을 칼라별로 평활화하는 히스토그램 평활화부, 평활화된 RGB 신호로부터 변환된 YCbCr 신호 및 기설정된 YCbCr 임계값을 이용하여 RGB 신호의 기준영역을 검출하는 기준영역 검출부, 기준영역에 포함된 G 신호의 평균값을 이용하여 기준영역에 포함된 RGB 신호의 각 게인(Gain) 값을 연산하는 게인 연산부 및 RGB 신호의 게인(Gain) 값을 이용하여 화이트밸런스를 조정하는 화이트밸런스 조정부를 포함한다.
본 발명에 따른 화이트밸런스 자동조정장치는 기설정된 임계값을 이용하여 기준 영역을 검출함으로서, 화이트밸런스 조정을 위한 처리시간을 최소화시킬 수 있다.
화이트밸런스(White Balance), 히스토그램 평활화(histogram Equalization), RGB 신호, 베이어(Bayer) 영상 신호-
公开(公告)号：KR1019950012084A
公开(公告)日：1995-05-16
申请号：KR1019930020763
申请日：1993-10-07
IPC: G01S13/00
Abstract: 입력되는 다수의 셀신호중에서 수서통계 신호를 만들어내기 위한 방법에 있어서, 1) 입력신호 X
i 의 크기에 어떤 계수를 곱하여 신호 X
i '를 만들고, 2) 신호 X
i '를 다른 입력신호와 비교한 개수신호 μ
i 를 "0"으로 초기화하고, 3) 다수의 선행 입력신호들과 하나하나 비교하여 계수신호를 갱신하고, 4) 다수의 후행 입력신호들과 하나하나 비교하여 계수신호를 갱신하고, 5) 미리 설정된 수와 최종 갱신된 계수신호를 비교하여 이 계수신호가 설정된 수보다 작기 아니하면 입력신호 X
i 를 표적신호라고 판단하는 단계들를 포함하여 이루어지는 것이 특징인 순서통계 신호를 발생하는 방법과 이를 실현시키는 시스톨릭구조의 비선형 필터이다.
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