公开(公告)号：KR1020150049687A

公开(公告)日：2015-05-08

申请号：KR1020130130546

申请日：2013-10-30

Applicant: 한국전자통신연구원

Inventor： 이재호 ,  라상중 ,  최동준 ,  허남호

IPC: H04J11/00

CPC classification number: H04L27/2659 ,  H04L27/01 ,  H04L27/266

Abstract: OFDM 수신장치는등화기로부터등화된신호로부터잔여주파수오프셋을추정하고, 등화된신호에상기잔여주파수오프셋의역수를곱하여상기잔여주파수오프셋을보상한다.

Abstract translation: 本发明的目的是提供一种用于补偿正交频分复用（OFDM）接收机的残余频率偏移的装置和方法，以减少用于补偿残余频率偏移的硬件的复杂度。 OFDM接收机通过估计由均衡器均衡的信号的残余频率偏移量来补偿残余频率偏移，并将均衡信号乘以残余频率偏移的倒数。

公开(公告)号：KR1020140124684A

公开(公告)日：2014-10-27

申请号：KR1020130042534

申请日：2013-04-17

Applicant: 한국전자통신연구원

Inventor： 라상중 ,  구한승 ,  김양수 ,  이재호 ,  최동준 ,  허남호

IPC: G06F17/14 ,  H04L27/26

CPC classification number: G06F17/142

Abstract: 고속 푸리에 변환(Fast Fourier Transform : FFT) 방법 및 장치가 제공된다. 본 명세서는 시스템에 적용되는 변수를 기초로, FFT 사이즈를 결정하고 버터플라이 연산의 수를 결정하고, 상기 버터플라이 연산의 출력에 이용되는 메모리의 크기를 결정함, 상기 결정한 FFT 사이즈, 버터플라이 연산의 수 및 메모리의 크기를 이용하여 고속 푸리에 변환을 수행함을 포함한다.

Abstract translation: 公开了一种快速傅里叶变换（FFT）方法及其装置。 本说明书包括基于应用于系统的变量来确定FFT大小，蝶形运算的数量和用于蝶形运算的输出的存储器大小，以及通过使用所确定的FFT大小来执行FFT，确定的蝴蝶数 操作和确定的内存大小。

公开(公告)号：KR1020130055247A

公开(公告)日：2013-05-28

申请号：KR1020110120902

申请日：2011-11-18

Applicant: 한국전자통신연구원

Inventor： 이재호 ,  김양수 ,  구한승 ,  라상중 ,  최동준 ,  허남호

IPC: H04L27/26 ,  H04L27/34 ,  H04L25/03

CPC classification number: H04L27/2601 ,  H04L27/3809

Abstract: PURPOSE: An automatic gain controller, an OFDM(Orthogonal Frequency Division Multiplexing) receiver using a QAM(Quadrature Amplitude Modulation) method using the device, and a manufacturing method of the device are provided to prevent performance degradation of an OFDM receiver. CONSTITUTION: An automatic gain controller(500) includes a power calculation unit(510) and a gain control unit(520). The power calculation unit calculates power of a signal received from an OFDM receiver. The power calculation unit receives data about IQ coordinate on a constellation map with respect to a modulated signal using a high order QAM method and calculates power of a received signal. The gain control unit controls a gain of the received signal based on the calculated power. The gain control unit controls the gain of the received signal using the inverse of the square root of power. [Reference numerals] (500) Automatic gain controller; (510) Power calculation unit; (520) Gain control unit; (AA) Reception signal; (BB) Power

Abstract translation: 目的：提供使用该装置的QAM（正交频分调制）方法的自动增益控制器，OFDM（正交频分复用）接收机以及该装置的制造方法，以防止OFDM接收机的性能下降。 构成：自动增益控制器（500）包括功率计算单元（510）和增益控制单元（520）。 功率计算单元计算从OFDM接收机接收的信号的功率。 功率计算单元使用高阶QAM方法相对于调制信号在星座图上接收关于IQ坐标的数据，并计算接收信号的功率。 增益控制单元基于计算出的功率来控制接收信号的增益。 增益控制单元使用功率的平方根的倒数来控制接收信号的增益。 （附图标记）（500）自动增益控制器; （510）功率计算单元; （520）增益控制单元; （AA）接收信号; （BB）电源

公开(公告)号：KR1020120059734A

公开(公告)日：2012-06-11

申请号：KR1020100121136

申请日：2010-12-01

Applicant: 한국전자통신연구원

Inventor： 라상중 ,  이재호 ,  최동준 ,  이수인

IPC: H04N21/47

CPC classification number: H04N21/478 ,  G06F17/30 ,  G06Q50/265

Abstract: PURPOSE: A public service providing system through a settop box is provided to help the old through a settop box for digital cable broadcasting. CONSTITUTION: A public service managing unit(20) receives an urgent call message. The public service managing unit inquires database based on subscriber identifying information. The subscriber identifying information is included in the received urgent call message. The public service managing unit detects information of a requester who requests an urgent call. The public service managing unit transmits the urgent call message to a public service institute. The urgent call message includes information of the requester.

Abstract translation: 目的：通过机顶盒提供公共服务提供系统，以帮助老年人通过数字有线广播的机顶盒。 规定：公共服务管理单元（20）接收紧急呼叫消息。 公共业务管理单元根据用户识别信息查询数据库。 订户识别信息被包括在接收到的紧急呼叫消息中。 公共服务管理单元检测请求紧急呼叫的请求者的信息。 公共服务管理单元向公共服务机构发送紧急呼叫消息。 紧急呼叫消息包括请求者的信息。

公开(公告)号：KR1020110071489A

公开(公告)日：2011-06-29

申请号：KR1020090128075

申请日：2009-12-21

Applicant: 한국전자통신연구원

Inventor： 라상중

IPC: H04N7/015 ,  H04N5/50

CPC classification number: H04N21/4384 ,  H04N21/6125 ,  H04N21/631 ,  H04N21/6371

Abstract: PURPOSE: An IPTV(Internet Protocol Television) STB(Set Top Box) and a channel switching method thereof are provided to receive and display local broadcasting stream for a blank time created in the channel switching. CONSTITUTION: A broadcasting stream receiving unit(110) receives broadcasting stream for local service and broadcasting stream for national service. In the state that the broadcasting stream for national service for a first channel is received, a channel selection signal receiver(120) receives a channel selection signal for a second channel. A channel switching request processor(130) requests channel switching to a network switch.

Abstract translation: 目的：提供IPTV（因特网协议电视）STB（机顶盒）及其信道切换方法，用于接收和显示在信道切换中创建的空白时间的本地广播流。 构成：广播流接收单元（110）接收用于本地业务的广播流和国家业务的广播流。 在接收到用于第一频道的国家业务的广播流的状态下，频道选择信号接收机（120）接收第二频道的频道选择信号。 信道切换请求处理器（130）向网络交换机请求信道切换。

公开(公告)号：KR1020110071422A

公开(公告)日：2011-06-29

申请号：KR1020090127987

申请日：2009-12-21

Applicant: 한국전자통신연구원

Inventor： 라상중

IPC: H04W28/18

CPC classification number: H04W28/20 ,  H04W28/04

Abstract: PURPOSE: A multimedia data transmitting method using variable band width information is provided to decide the transmission parameter according to the variable band width information of a receiving device, and to create the pilot data. CONSTITUTION: A transmitting device(100) receives an abnormal reception response for the multimedia data from a receiving device(300). The transmitting device re-receives the variable bandwidth information from a receiving device(420). The transmitting device varies the transmission parameter(430). The transmitting device creates the pilot data including the varied transmission parameter(440). The transmitting device transmits the pilot data to the receiving device(450). The transmitting device retransmits the multimedia data to the receiving device.

Abstract translation: 目的：提供使用可变带宽信息的多媒体数据传输方法，以根据接收设备的可变带宽信息来决定传输参数，并创建导频数据。 构成：发送装置（100）从接收装置（300）接收多媒体数据的异常接收响应。 发送装置从接收装置重新接收可变带宽信息（420）。 发送装置改变传输参数（430）。 发送装置创建包括变化的发送参数（440）的导频数据。 发送装置将导频数据发送到接收装置（450）。 发送装置将多媒体数据重发到接收装置。

公开(公告)号：KR1020100072891A

公开(公告)日：2010-07-01

申请号：KR1020080131434

申请日：2008-12-22

Applicant: 한국전자통신연구원

Inventor： 라상중 ,  송윤정 ,  이수인

IPC: H04N5/50 ,  H04N21/434

CPC classification number: H04N21/6125 ,  H04N21/42607 ,  H04N21/472 ,  H04N21/64322

Abstract: PURPOSE: A method and an apparatus for an Internet protocol television service to switch a channel are provided to supply user convenience by selecting broadcasting contents of a maximum resolution in priority. CONSTITUTION: A channel switching request processor(510) requests channel switching into a network switch, and a broadcasting stream receiver(520) receives a broadcasting stream of a corresponding channel from a switch. A decoding processor(530) decodes broadcasting contents in priority, wherein the broadcasting contents corresponds to the maximum resolution among broadcasting streams. A broadcasting content transmitter(540) transmits the decoded broadcasting contents to a display device.

Abstract translation: 目的：提供用于互联网协议电视服务切换频道的方法和装置，以通过选择优先级最大分辨率的广播内容来提供用户便利。 构成：信道切换请求处理器（510）向网络交换机请求信道切换，广播流接收机（520）从交换机接收相应信道的广播流。 解码处理器（530）优先解码广播内容，其中广播内容对应于广播流中的最大分辨率。 广播内容发送器（540）将解码的广播内容发送到显示装置。